CN113352885B - Control method and device for PTO clutch of power output device - Google Patents
Control method and device for PTO clutch of power output device Download PDFInfo
- Publication number
- CN113352885B CN113352885B CN202110774559.XA CN202110774559A CN113352885B CN 113352885 B CN113352885 B CN 113352885B CN 202110774559 A CN202110774559 A CN 202110774559A CN 113352885 B CN113352885 B CN 113352885B
- Authority
- CN
- China
- Prior art keywords
- pto
- pressure
- clutch
- abnormal
- pto clutch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K25/00—Auxiliary drives
- B60K25/06—Auxiliary drives from the transmission power take-off
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
Abstract
The invention provides a control method and a device for a PTO clutch of a power take-off unit, wherein the method comprises the following steps: responding to the combination instruction, and acquiring the running state of the whole vehicle; judging whether the running state of the whole vehicle meets the combination condition or not; if so, applying pressure to the PTO clutch according to a first pressure application strategy, and detecting the state of the PTO shaft; applying pressure to the PTO clutch according to a second pressure application strategy to engage the PTO clutch when rotation of the PTO shaft is detected; wherein the rate of pressure increase of the second pressure applying strategy is greater than the rate of pressure increase of the first pressure applying strategy; detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal or not in real time in the process of applying pressure to the clutch according to a second pressure applying strategy; and when the speed difference change rate is detected to be abnormal, adjusting the pressure applied to the clutch so that the speed difference change rate is in a normal state. It is possible to reduce wear of the PTO clutch.
Description
Technical Field
The invention relates to the technical field of vehicle safety, in particular to a control method and a control device for a power take-off (PTO) clutch.
Background
Power take-offs are commonly used in vehicles, such as tractors and trucks, to provide power from the vehicle's engine to a machine (e.g., an agricultural implement) that may be attached to or towed behind the vehicle. For example, in agricultural applications, a tractor may tow an implement (e.g., a cultivator, seeder, harvester, etc.) across a field to perform an agricultural task. The PTO may be coupled to an engine of the vehicle (e.g., via a drive shaft) to provide power to the implement. The PTO may include a PTO clutch to couple and decouple the PTO shaft and the drive shaft.
During the operation of the implement, the pressure control for the engagement of the PTO clutch is usually achieved by closed-loop control, however, with the prior art solution, the PTO clutch is susceptible to ineffective engagement due to driver misoperation, resulting in clutch wear.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a control method of a power take-off PTO clutch, which can reduce the abrasion of the PTO clutch.
The invention also provides a control device of the PTO clutch of the power output device, which is used for ensuring the realization and the application of the method in practice.
A method of controlling a PTO clutch of a power take off, comprising:
responding to the combination instruction, and acquiring the running state of the whole vehicle;
judging whether the running state of the whole vehicle meets a preset combination condition or not;
if the running state of the whole vehicle meets the combination condition, applying pressure to a PTO clutch of a power output device according to a first pressure application strategy, and detecting the state of a PTO shaft;
applying pressure to the PTO clutch according to a second pressure application strategy to control engagement of the PTO clutch when rotation of the PTO shaft is detected; wherein the rate of pressure increase of the second pressure applying strategy is greater than the rate of pressure increase of the first pressure applying strategy;
detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal in real time in the process of applying pressure to the clutch according to the second pressure application strategy;
and when the speed difference change rate is detected to be abnormal, adjusting the pressure applied to the clutch so that the speed difference change rate is in a normal state.
Optionally, the judging whether the running state of the entire vehicle meets the preset combination condition includes:
if the engine speed in the whole vehicle running state is less than a preset speed threshold, the actual vehicle speed is less than a preset vehicle speed threshold, the engine load rate is less than a preset load rate threshold, the engine state is in a normal state and the PTO gear combination state is in a whole vehicle state, judging that the whole vehicle running state meets the combination condition; otherwise, judging that the running state of the whole vehicle does not meet the combination condition.
The method described above, optionally, detects in real time whether the rate of change of the speed difference between the current PTO shaft and the engine is abnormal, including:
calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment;
judging whether the difference value is within a preset threshold interval or not;
if the difference value is in the threshold interval, determining that the current speed difference change rate is not abnormal;
and if the difference value is larger than the upper limit value of the threshold interval or smaller than the lower limit value of the threshold interval, determining that the current speed difference change rate is abnormal.
The method described above, optionally, wherein said adjusting the pressure applied to said clutch comprises:
if the difference value is larger than the upper limit value of the threshold interval, reducing the pressure applied to the clutch at the next moment;
and if the difference is smaller than the lower limit value of the threshold interval, increasing the pressure applied to the clutch at the next moment.
The above method, optionally, further includes:
acquiring friction work of the PTO clutch in the process of combining the PTO clutch;
and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
The method described above, optionally, further includes:
if the combination of the PTO clutch is successfully detected, detecting whether the speed difference between the PTO shaft and the engine is abnormal or not, and detecting whether the rotating speed of the engine is abnormal or not;
and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the PTO clutch is disengaged.
A control apparatus for a PTO clutch of a power take-off, comprising:
the acquiring unit is used for responding to the combination instruction and acquiring the running state of the whole vehicle;
the judging unit is used for judging whether the running state of the whole vehicle meets preset combination conditions or not;
the first execution unit is used for applying pressure to the PTO clutch of the power output device according to a first pressure application strategy and detecting the state of the PTO shaft if the running state of the whole vehicle meets the combination condition;
the second execution unit is used for applying pressure to the PTO clutch according to a second pressure application strategy when the rotation of the PTO shaft is detected so as to control the PTO clutch to be combined; wherein the rate of pressure increase of the second pressure applying strategy is greater than the rate of pressure increase of the first pressure applying strategy;
the detection unit is used for detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal in real time in the process of applying pressure to the clutch according to the second pressure application strategy;
and the pressure adjusting unit is used for adjusting the pressure applied to the clutch when the speed difference change rate is detected to be abnormal, so that the speed difference change rate is in a normal state.
Optionally, the above apparatus, wherein the detecting unit includes:
the calculating subunit is used for calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment;
a judging subunit, configured to judge whether the difference is within a preset threshold interval;
the first determining subunit is configured to determine that the current speed difference change rate is not abnormal if the difference value is within the threshold interval;
and the second determining subunit is configured to determine that the current speed difference change rate is abnormal if the difference exceeds the upper limit value of the threshold interval or is lower than the lower limit value of the threshold interval.
The above apparatus, optionally, further comprises:
the friction work detection unit is used for acquiring the friction work of the PTO clutch in the process of combining the PTO clutch; and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
The above apparatus, optionally, further comprises:
an abnormality detection unit for detecting whether or not a speed difference between the PTO shaft and the engine is abnormal and whether or not an abnormality occurs in a rotational speed of the engine if it is detected that the PTO clutch is successfully engaged; and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the PTO clutch is disengaged.
Compared with the prior art, the invention has the following advantages:
the invention provides a control method and a device for a power take-off (PTO) clutch, wherein the method comprises the following steps: responding to the combination instruction, and acquiring the running state of the whole vehicle; judging whether the running state of the whole vehicle meets preset combination conditions or not; if the running state of the whole vehicle meets the combination condition, applying pressure to a PTO clutch of a power output device according to a first pressure application strategy, and detecting the state of a PTO shaft; applying pressure to the PTO clutch according to a second pressure application strategy to control engagement of the PTO clutch when rotation of the PTO shaft is detected; wherein the rate of pressure increase of the second pressure applying strategy is greater than the rate of pressure increase of the first pressure applying strategy; detecting in real time whether a rate of change of a speed difference between the PTO shaft and the engine is abnormal in a process of applying pressure to the clutch according to the second pressure applying strategy; and when the speed difference change rate is detected to be abnormal, adjusting the pressure applied to the clutch so that the speed difference change rate is in a normal state. The control method of the power take-off device PTO clutch provided by the invention can detect the speed difference change rate between the PTO shaft and the engine in the process of quickly applying pressure to the PTO clutch, so that the pressure applied to the PTO clutch can be adjusted according to the speed difference change rate, the PTO clutch can be effectively protected, and the abrasion of the PTO clutch can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart of a method for controlling a PTO clutch of a power take-off provided by the present invention;
FIG. 2 is a flow chart of a process provided by the present invention for detecting if an abnormality has occurred in the rate of change of speed differential between the PTO shaft and the engine;
FIG. 3 is an exemplary diagram of a method for controlling a PTO clutch of the power take-off provided by the present invention;
fig. 4 is a schematic structural view of a control device of a PTO clutch of a power take-off according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
An embodiment of the present invention provides a method for controlling a PTO clutch of a power take-off, which may be applied to a controller in a vehicle, where a flowchart of the method is shown in fig. 1, and specifically includes:
s101: and responding to the combination instruction, and acquiring the running state of the whole vehicle.
The running state of the whole vehicle comprises at least one of the state parameters of the engine speed, the actual vehicle speed, the engine load rate, the engine state, the PTO gear state and the like.
S102: and judging whether the running state of the whole vehicle meets a preset combination condition, if so, executing S103, and if not, executing S104.
The combination condition comprises one or more of the conditions that the engine speed in the running state of the whole vehicle is less than a preset speed threshold, the actual vehicle speed is less than a preset vehicle speed threshold, the engine load rate is less than a preset load rate threshold, the engine state is in a normal state, the PTO gear state is in a normal state and the like.
S103: and applying pressure to the PTO clutch of the power output device according to a preset first pressure application strategy, and detecting the state of the PTO shaft.
In an embodiment of the invention, the first pressure application strategy comprises a first pressure increase rate for the PTO clutch, which may be a smaller rate, i.e. the PTO clutch may be slowly pressurized according to the first pressure application strategy.
S104: the PTO clutch is disengaged.
S105: when the PTO shaft is detected to rotate, applying pressure to the PTO clutch according to a preset second pressure application strategy so as to control the PTO clutch to be combined; wherein a pressure increase rate of the second pressure applying strategy is greater than a pressure increase rate of the first pressure applying strategy.
In an embodiment of the present invention, the PTO shaft is determined to be rotating when the rotational speed of the PTO shaft is obtained, in which case the second pressure applying strategy may be used to rapidly apply pressure to the PTO clutch.
S106: and detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal or not in real time in the process of applying the pressure to the clutch according to the second pressure application strategy.
In an embodiment of the invention the rate of change of speed difference may be the rate of change of the difference in rotational speed between the PTO shaft and the engine.
In the embodiment of the present invention, it may be detected whether the speed difference change rate increases linearly, and if the speed difference change rate increases linearly, it indicates that the current speed difference change rate is not abnormal, and if the speed difference change rate increases non-linearly, it indicates that the current speed difference change rate is abnormal.
S107: and when the speed difference change rate is detected to be abnormal, adjusting the pressure applied to the clutch so that the speed difference change rate is in a normal state.
Wherein the pressure subsequently required to be applied to the clutch can be increased or decreased.
In an embodiment of the present invention, if no anomaly in the rate of change of differential speed is detected, the strategy of currently applied pressure to the PTO clutch may be maintained until the PTO clutch is successfully engaged.
Based on the implementation process, the method provided by the embodiment of the invention specifically judges whether the running state of the whole vehicle meets the preset combination condition, and includes:
if the engine speed in the whole vehicle running state is less than a preset speed threshold, the actual vehicle speed is less than a preset vehicle speed threshold, the engine load rate is less than a preset load rate threshold, the engine state is in a normal state and the PTO gear combination state is in a normal state, judging that the whole vehicle running state meets the combination condition; otherwise, judging that the running state of the whole vehicle does not meet the combination condition.
In the embodiment of the present invention, if any one of the following conditions occurs: the engine speed is not greater than a preset speed threshold, the actual vehicle speed is not less than a vehicle speed threshold, the engine load rate is not less than a load rate threshold, the engine state is in an abnormal state, and the PTO gear combination state is in a normal state; determining that the running state of the whole vehicle does not meet the combination condition.
In the method provided in the embodiment of the present invention, based on the foregoing implementation process, a feasible manner of detecting whether an abnormality occurs in a speed difference change rate between the current PTO shaft and the engine in real time is specifically provided, as shown in fig. 2, which specifically includes:
s201: and calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment.
In the embodiment of the present invention, the difference value may be obtained by subtracting the speed difference change rate at the previous time from the current speed difference change rate.
S202: and judging whether the difference value is in a preset threshold interval.
The threshold interval includes an upper limit value and a lower limit value.
S203: and if the difference value is in the threshold interval, determining that the current speed difference change rate is not abnormal.
In the embodiment of the present invention, if the difference is in the threshold interval, it indicates that the deviation between the current speed difference change rate and the speed difference change rate at the previous time is small, and the deviation is in a normal change range, that is, the current speed difference change rate is not abnormal.
S204: and if the difference value is larger than the upper limit value of the threshold interval or smaller than the lower limit value of the threshold interval, determining that the current speed difference change rate is abnormal.
In the embodiment of the present invention, if the difference is greater than the upper limit value or less than the lower limit value, it indicates that the difference between the current speed difference change rate and the speed difference change rate at the previous time is large, that is, the current speed difference change rate is abnormal.
In the method provided in the embodiment of the present invention, based on the foregoing implementation process, specifically, the adjusting the pressure applied to the clutch includes:
if the difference is larger than the upper limit value of the threshold interval, reducing the pressure applied to the clutch at the next moment;
and if the difference is smaller than the lower limit value of the threshold interval, increasing the pressure applied to the clutch at the next moment.
In the embodiment of the invention, the pressure to be adjusted can be determined according to the difference.
For example, if the difference is greater than the upper limit value of the threshold interval, the currently applied pressure is M newtons, the pressure that needs to be applied at the next time is M + T newtons, and the pressure value that needs to be reduced is K newtons calculated based on the difference, the pressure applied at the next time may be reduced to M + T-K newtons. If the difference is smaller than the lower limit of the threshold interval, and the value of the pressure to be increased is calculated to be P newtons based on the difference, the pressure applied at the next moment may be increased to be M + T + P newtons, where M, T, K, P may be a real number.
In the method provided in the embodiment of the present invention, based on the implementation process, specifically, the method further includes:
acquiring friction work of the PTO clutch in the process of combining the PTO clutch;
and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
In the embodiment of the invention, the friction work threshold can be set according to actual requirements, and by setting the friction work threshold, the combination of the PTO clutch can be quitted under the condition that the friction work of the PTO clutch is large, so that the PTO clutch can be effectively protected.
In the method provided in the embodiment of the present invention, based on the implementation process, specifically, the method further includes:
if the PTO clutch is successfully combined, detecting whether the speed difference between the PTO shaft and the engine is abnormal or not, and detecting whether the rotating speed of the engine is abnormal or not;
and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the coupling of the PTO clutch is released.
In an embodiment of the present invention, one possible way to detect whether the speed difference between the PTO shaft and the engine is abnormal is: and detecting whether the speed difference of the PTO shaft is greater than a preset first speed difference threshold value or not in real time, judging whether the speed difference is greater than a preset second speed difference threshold value or not in a preset first time period when the speed difference is greater than the first speed difference threshold value, if so, determining that the speed difference is abnormal, and otherwise, determining that the speed difference is not abnormal.
In the embodiment of the invention, whether the variation of the rotating speed of the engine is larger than a preset threshold value of the variation of the rotating speed is detected, and if yes, the rotating speed of the engine is determined to be abnormal.
In the method provided by the embodiment of the present invention, based on the foregoing implementation process, specifically, after the PTO clutch is disengaged, the acquiring of the running state of the entire vehicle and the subsequent steps in S101 may be executed again after the preset second time period.
And the second duration is set, so that repeated and repeated combination of the PTO in a short time can be avoided, and the abrasion to the PTO clutch is reduced.
Referring to fig. 3, there is provided a flow chart of still another method for controlling a PTO clutch of a power take-off according to an embodiment of the present invention, in which clutch wear due to driver's misoperation or abnormal coupling of the PTO under a special condition is reduced by providing a protective measure before, during, and after coupling for three periods of stable operation.
Before the PTO clutch is engaged, it is judged whether the engagement condition is satisfied based on the vehicle running state. Before the PTO clutch is combined, whether the current running state of the whole vehicle meets the combination condition or not is judged according to the five conditions of the engine rotating speed, the actual vehicle speed, the engine load rate, the engine state and the PTO gear combination state. And limiting the PTO combination when the engine speed exceeds a threshold value, the actual vehicle speed exceeds a threshold value, the engine load rate exceeds a threshold value, the engine state is abnormal and the PTO gear state is abnormal. The PTO can enter the engaged phase only if all of the above five conditions are within a threshold range or the state is normal. This protective measure is monitored throughout the coupling process and before coupling is successful, and as long as any of the above conditions is not met, this PTO clutch coupling is interrupted.
And in the process of combining the PTO clutch, determining a speed difference change rate based on the speed difference between the PTO shaft and the rotating speed of the engine, and controlling the PTO combining process by taking the speed difference change rate as a criterion for judging whether the adjustment is needed in the process of combining the PTO.
Specifically, the PTO clutch is first filled with oil, and after the oil filling is completed, the pressure is started to be applied to the clutch. The pressure is first slowly increased and when the PTO shaft is about to have output speed, a rapid pressure increase phase is initiated. During the rapid pressure increase, the rate of change of the speed differential between the PTO and the engine is monitored in real time. When the speed difference change rate is increased nonlinearly, the pressure applied to the PTO clutch is adjusted according to the change of the speed difference change rate, so that the stable combination of the PTO is ensured in the whole combination process, and large speed difference fluctuation can not occur. And in the combining process, increasing a friction work judging condition, and stopping combining when the friction work exceeds the limit in the combining process. In addition, due to the fact that the PTO is abnormally withdrawn from the PTO combining mode for a long time due to the fact that the output rotating speed of the PTO is smaller than the threshold value, the friction work is over-limited and the like, the fact that the PTO is combined again is limited, and the situation that the PTO is repeatedly combined for many times in a short time, so that a PTO clutch does not work normally and abrasion is aggravated is avoided.
After the PTO clutch engagement is completed, there are two main protective measures:
(1) and judging the current clutch combination state through monitoring the speed difference. When the coupling is successful, the speed differential is greater than a threshold at some point and for some time the speed differential is greater than another threshold, the PTO clutch is disengaged.
(2) During normal operation after successful engagement, if the engine speed changes abnormally, for example, when a rapid speed drop occurs, the PTO clutch is disengaged.
According to the method provided by the embodiment of the invention, corresponding protection logics are established for the PTO clutch before combination, during combination and after combination in the whole process, the whole process protection for the PTO clutch can be realized, the abrasion caused by the misoperation of a driver or the abnormal combination of the PTO clutch under a special working condition is greatly reduced on the premise of ensuring the normal work of the PTO, and the service life of the PTO clutch can be effectively prolonged.
Corresponding to the method shown in fig. 1, an embodiment of the present invention further provides a control device for a PTO clutch of a power take-off, which is used for implementing the method shown in fig. 1, and a schematic structural diagram of the control device for the PTO clutch of the power take-off provided by the embodiment of the present invention is shown in fig. 4, and specifically includes:
an obtaining unit 401, configured to obtain an entire vehicle running state in response to the combination instruction;
a determining unit 402, configured to determine whether the vehicle running state meets a preset combination condition;
a first executing unit 403, configured to apply pressure to the PTO clutch of the power output apparatus according to a first pressure applying strategy and detect a state of the PTO shaft if the vehicle running state satisfies the engagement condition;
a second execution unit 404, configured to apply pressure to the PTO clutch according to a second pressure application strategy to control engagement of the PTO clutch when rotation of the PTO shaft is detected; wherein the rate of pressure increase of the second pressure applying strategy is greater than the rate of pressure increase of the first pressure applying strategy;
a detecting unit 405, configured to detect in real time whether a speed difference change rate between the PTO shaft and the engine is abnormal in a process of applying pressure to the clutch according to the second pressure application strategy;
a pressure adjusting unit 406, configured to adjust the pressure applied to the clutch when detecting that the speed difference change rate is abnormal, so that the speed difference change rate is in a normal state.
In an embodiment provided by the present invention, based on the above scheme, optionally, the detecting unit 405 includes:
the calculating subunit is used for calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment;
the judgment subunit is used for judging whether the difference value is within a preset threshold interval or not;
the first determining subunit is configured to determine that the current speed difference change rate is not abnormal if the difference value is within the threshold interval;
and the second determining subunit is used for determining that the current speed difference change rate is abnormal if the difference exceeds the upper limit value of the threshold interval or is lower than the lower limit value of the threshold interval.
In an embodiment provided by the present invention, based on the above scheme, optionally, the method further includes:
the friction work detection unit is used for acquiring the friction work of the PTO clutch in the process of combining the PTO clutch; and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
In an embodiment provided by the present invention, based on the above scheme, optionally, the method further includes:
an abnormality detection unit for detecting whether or not a speed difference between the PTO shaft and an engine is abnormal and whether or not a rotational speed of the engine is abnormal, if it is detected that the PTO clutch is successfully engaged; and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the PTO clutch is disengaged.
The specific principle and implementation process of each unit and module in the control device of the PTO clutch of the power take-off disclosed in the embodiment of the present invention are the same as the control method of the PTO clutch of the power take-off disclosed in the embodiment of the present invention, and reference may be made to the corresponding parts in the control method of the PTO clutch of the power take-off provided in the embodiment of the present invention, and details are not repeated here.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functions of the units may be implemented in the same software and/or hardware or in a plurality of software and/or hardware when implementing the invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The above detailed description of the method for controlling a PTO clutch of a power take-off provided by the present invention, and the specific examples applied herein, have been provided to illustrate the principles and embodiments of the present invention, and the above description of the embodiments is only provided to help understand the method of the present invention and its core idea; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of controlling a PTO clutch of a power take-off, comprising:
responding to the combination instruction, and acquiring the running state of the whole vehicle;
judging whether the running state of the whole vehicle meets a preset combination condition or not;
if the running state of the whole vehicle meets the combination condition, applying pressure to a PTO clutch of a power output device according to a preset first pressure applying strategy, and detecting the state of a PTO shaft;
when the PTO shaft is detected to rotate, applying pressure to the PTO clutch according to a preset second pressure application strategy so as to control the PTO clutch to be combined; wherein the second pressure application strategy has a pressure increase rate that is greater than the pressure increase rate of the first pressure application strategy;
detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal in real time in the process of applying pressure to the clutch according to the second pressure application strategy;
and when the speed difference change rate is detected to be abnormal, adjusting the pressure applied to the clutch so that the speed difference change rate is in a normal state.
2. The method according to claim 1, wherein the judging whether the running state of the whole vehicle meets a preset combination condition comprises:
if the engine speed in the whole vehicle running state is less than a preset speed threshold, the actual vehicle speed is less than a preset vehicle speed threshold, the engine load rate is less than a preset load rate threshold, the engine state is in a normal state and the PTO gear combination state is in a normal state, judging that the whole vehicle running state meets the combination condition; otherwise, judging that the running state of the whole vehicle does not meet the combination condition.
3. The method of claim 1, wherein detecting in real time whether an abnormality occurs in a rate of change of a speed differential between the current PTO shaft and the engine comprises:
calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment;
judging whether the difference value is in a preset threshold interval or not;
if the difference value is in the threshold interval, determining that the current speed difference change rate is not abnormal;
and if the difference value is larger than the upper limit value of the threshold interval or smaller than the lower limit value of the threshold interval, determining that the current speed difference change rate is abnormal.
4. The method of claim 3, wherein said adjusting the pressure applied to said clutch comprises:
if the difference value is larger than the upper limit value of the threshold interval, reducing the pressure applied to the clutch at the next moment;
and if the difference is smaller than the lower limit value of the threshold interval, increasing the pressure applied to the clutch at the next moment.
5. The method of claim 1, further comprising:
acquiring friction work of the PTO clutch in the process of combining the PTO clutch;
and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
6. The method of claim 1, further comprising:
if the PTO clutch is successfully combined, detecting whether the speed difference between the PTO shaft and the engine is abnormal or not, and detecting whether the rotating speed of the engine is abnormal or not;
and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the coupling of the PTO clutch is released.
7. A control device for a PTO clutch of a power take-off, comprising:
the acquisition unit is used for responding to the combination instruction and acquiring the running state of the whole vehicle;
the judging unit is used for judging whether the running state of the whole vehicle meets preset combination conditions or not;
the first execution unit is used for applying pressure to the PTO clutch of the power output device according to a preset first pressure application strategy and detecting the state of the PTO shaft if the running state of the whole vehicle meets the combination condition;
the second execution unit is used for applying pressure to the PTO clutch according to a preset second pressure application strategy when the PTO shaft is detected to rotate so as to control the PTO clutch to be combined; wherein the second pressure application strategy has a pressure increase rate that is greater than the pressure increase rate of the first pressure application strategy;
the detection unit is used for detecting whether the speed difference change rate between the PTO shaft and the engine is abnormal in real time in the process of applying pressure to the clutch according to the second pressure application strategy;
and the pressure adjusting unit is used for adjusting the pressure applied to the clutch when the speed difference change rate is detected to be abnormal, so that the speed difference change rate is in a normal state.
8. The apparatus of claim 7, wherein the detection unit comprises:
the calculating subunit is used for calculating the difference value between the current speed difference change rate and the speed difference change rate at the previous moment;
the judgment subunit is used for judging whether the difference value is within a preset threshold interval or not;
the first determining subunit is configured to determine that the current speed difference change rate is not abnormal if the difference value is within the threshold interval;
and the second determining subunit is configured to determine that the current speed difference change rate is abnormal if the difference exceeds the upper limit value of the threshold interval or is lower than the lower limit value of the threshold interval.
9. The apparatus of claim 7, further comprising:
the friction work detection unit is used for acquiring the friction work of the PTO clutch in the process of combining the PTO clutch; and if the friction work of the PTO clutch is greater than a preset friction work threshold value, the combination of the PTO clutch is quitted.
10. The apparatus of claim 7, further comprising:
an abnormality detection unit for detecting whether or not a speed difference between the PTO shaft and the engine is abnormal and whether or not an abnormality occurs in a rotational speed of the engine if it is detected that the PTO clutch is successfully engaged; and if the speed difference is abnormal or the rotating speed of the engine is abnormal, the coupling of the PTO clutch is released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774559.XA CN113352885B (en) | 2021-07-08 | 2021-07-08 | Control method and device for PTO clutch of power output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774559.XA CN113352885B (en) | 2021-07-08 | 2021-07-08 | Control method and device for PTO clutch of power output device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113352885A CN113352885A (en) | 2021-09-07 |
| CN113352885B true CN113352885B (en) | 2022-07-15 |
Family
ID=77538736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110774559.XA Active CN113352885B (en) | 2021-07-08 | 2021-07-08 | Control method and device for PTO clutch of power output device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113352885B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06191298A (en) * | 1992-12-24 | 1994-07-12 | Iseki & Co Ltd | Pto clutch control device or tractor |
| JP2002052947A (en) * | 2000-08-09 | 2002-02-19 | Mitsubishi Automob Eng Co Ltd | Transmission power take-off device for vehicle |
| EP1580063A1 (en) * | 2004-03-26 | 2005-09-28 | CNH Italia S.p.A. | Power take-off control system. |
| CN201450752U (en) * | 2009-07-30 | 2010-05-12 | 重庆泽华农业机械制造有限公司 | Normally disengaged clutch of micro-cultivator |
| CN105437966A (en) * | 2014-10-31 | 2016-03-30 | 徐州重型机械有限公司 | Power takeoff with clutch function and crane |
| CN106956673A (en) * | 2016-01-11 | 2017-07-18 | 凯斯纽荷兰(中国)管理有限公司 | The system and method for determining PTO transmission ratios |
| CN111438822A (en) * | 2020-04-02 | 2020-07-24 | 邵阳学院 | Concrete truck and automatic control method for continuous stirring thereof |
| CN112443655A (en) * | 2019-08-30 | 2021-03-05 | 广州汽车集团股份有限公司 | Clutch semi-joint point self-adaption method and device, control equipment and storage medium |
| CN112594385A (en) * | 2020-12-01 | 2021-04-02 | 潍柴动力股份有限公司 | Rear power take-off assembly, engineering vehicle and control method of engineering vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9771079B2 (en) * | 2016-01-11 | 2017-09-26 | Cnh Industrial America Llc | Systems and method for control of a power take-off clutch |
| US10227942B2 (en) * | 2016-01-11 | 2019-03-12 | Cnh Industrial America Llc | System and method for controlling a powershift transmission |
-
2021
- 2021-07-08 CN CN202110774559.XA patent/CN113352885B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06191298A (en) * | 1992-12-24 | 1994-07-12 | Iseki & Co Ltd | Pto clutch control device or tractor |
| JP2002052947A (en) * | 2000-08-09 | 2002-02-19 | Mitsubishi Automob Eng Co Ltd | Transmission power take-off device for vehicle |
| EP1580063A1 (en) * | 2004-03-26 | 2005-09-28 | CNH Italia S.p.A. | Power take-off control system. |
| CN201450752U (en) * | 2009-07-30 | 2010-05-12 | 重庆泽华农业机械制造有限公司 | Normally disengaged clutch of micro-cultivator |
| CN105437966A (en) * | 2014-10-31 | 2016-03-30 | 徐州重型机械有限公司 | Power takeoff with clutch function and crane |
| CN106956673A (en) * | 2016-01-11 | 2017-07-18 | 凯斯纽荷兰(中国)管理有限公司 | The system and method for determining PTO transmission ratios |
| CN112443655A (en) * | 2019-08-30 | 2021-03-05 | 广州汽车集团股份有限公司 | Clutch semi-joint point self-adaption method and device, control equipment and storage medium |
| CN111438822A (en) * | 2020-04-02 | 2020-07-24 | 邵阳学院 | Concrete truck and automatic control method for continuous stirring thereof |
| CN112594385A (en) * | 2020-12-01 | 2021-04-02 | 潍柴动力股份有限公司 | Rear power take-off assembly, engineering vehicle and control method of engineering vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113352885A (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103982650B (en) | The Half engagement point decision method of hydraulic automatic speed variator clutch and system | |
| DE102018100148A1 (en) | FAULT TOLERANT MOTOR BRAKE SYSTEM | |
| US20110190995A1 (en) | Clutch slip recovery system and method | |
| CN113352885B (en) | Control method and device for PTO clutch of power output device | |
| CN112109547B (en) | Speed limiting method and device for internal combustion industrial vehicle | |
| CN111186310B (en) | Control method, device and equipment for preventing vehicle from sliding down slope | |
| CN105332861A (en) | Pre-protecting system for slipping of wind driven generator coupler and detection control method | |
| US5265705A (en) | Method of preventing wheel loader from slipping | |
| CN114728558A (en) | Method and system for monitoring vehicle load distribution | |
| CN104590252A (en) | Reverse sliding control method based on stability control system (SCS) | |
| CN113602132A (en) | Charging pile charging abnormity detection method and related equipment | |
| EP2851540B1 (en) | Anti-lug and anti-stall control unit | |
| US20150032350A1 (en) | System and method for reducing wear during build-up of engine torque | |
| US20140249726A1 (en) | Vehicle start-up control mechanism | |
| GB2514839B (en) | Clutch pedal torque limiting | |
| CN114347989B (en) | Vehicle speed control method and device | |
| EP3049688B1 (en) | Method for operating a drive train having a hydrodynamic clutch | |
| CN109263642B (en) | Vehicle creep protection method | |
| CN110758097A (en) | Control method and device for torque transmission of rear axle of four-wheel drive vehicle | |
| US10046768B2 (en) | High speed downshift management | |
| CN113203876A (en) | Power takeoff fault determination method and device, electronic equipment and storage medium | |
| EP3995684A1 (en) | Engine control method of an agricultural vehicle | |
| CN211078217U (en) | Safety operation control system of pipe crane | |
| CN113074103B (en) | Electronic oil pump control method and system with communication fault self-adaptive operation function | |
| US7822532B2 (en) | Power-based underspeed control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |