CN114526295A - Overload protection method and device for clutch, vehicle and storage medium - Google Patents

Overload protection method and device for clutch, vehicle and storage medium Download PDF

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Publication number
CN114526295A
CN114526295A CN202210179196.XA CN202210179196A CN114526295A CN 114526295 A CN114526295 A CN 114526295A CN 202210179196 A CN202210179196 A CN 202210179196A CN 114526295 A CN114526295 A CN 114526295A
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China
Prior art keywords
clutch
torque
actual
current state
speed difference
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CN202210179196.XA
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Chinese (zh)
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CN114526295B (en
Inventor
刘海亮
秦军超
丛强
李韶锁
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Honeycomb Transmission Technology Hebei Co Ltd
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Honeycomb Transmission Technology Hebei Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/184—Preventing damage resulting from overload or excessive wear of the driveline
    • B60W30/186—Preventing damage resulting from overload or excessive wear of the driveline excessive wear or burn out of friction elements, e.g. clutches
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The invention discloses an overload protection method and device of a clutch, a vehicle and a storage medium, wherein the method comprises the following steps: acquiring actual micro-slip torque of the clutch; determining a current state of the clutch; responding to the current state as an overload state, and adjusting the maximum engine torque threshold value of the transmission according to the actual micro-sliding friction torque; and adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value. Therefore, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, the clutch does not need to be opened in the whole overload protection process, the power transmission interruption is avoided, and the driving experience of a user is improved.

Description

Overload protection method and device for clutch, vehicle and storage medium
Technical Field
The invention relates to the technical field of clutches, in particular to an overload protection method and device of a clutch, a vehicle and a storage medium.
Background
With the gradual development of a vehicle from a single power source to a multi-power source, the power provided by the vehicle is stronger and stronger, so that the power of the vehicle may be too high at a moment, the actual torque carried by the clutch is already or is about to exceed the design limit, and when the clutch is not completely closed, the clutch is subjected to large sliding abrasion due to the too high torque, so that the clutch is overheated and is ablated or damaged.
The currently common clutch overload protection method is to calculate the clutch slip work, and when the clutch slip work exceeds a certain threshold, the clutch is directly opened to perform the clutch overheat protection, but the method can cause the interruption of power transmission and reduce the driving experience of a user.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide an overload protection method for a clutch, which adjusts an actual torque of an engine by adjusting a maximum engine torque threshold when the clutch is in an overload state, so as to protect the clutch and prevent the clutch from being ablated or damaged due to overheating, and in the whole overload protection process, the clutch does not need to be opened, so that power transmission is not interrupted, and user driving experience is improved.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the invention is to propose a vehicle.
A fourth object of the present invention is to provide an overload protection apparatus for a clutch.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an overload protection method for a clutch, including: acquiring actual micro-slip torque of the clutch; determining a current state of the clutch; responding to the current state as an overload state, and adjusting the maximum engine torque threshold value of the transmission according to the actual micro-sliding friction torque; and adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value.
According to the overload protection method of the clutch, the actual micro-slip torque of the clutch is obtained, the current state of the clutch is determined, when the current state of the clutch is the overload state, the maximum engine torque threshold value of the transmission is adjusted according to the actual micro-slip torque, and the actual torque of the engine is adjusted according to the adjusted maximum engine torque threshold value. Therefore, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, the clutch does not need to be opened in the whole overload protection process, the power transmission interruption is avoided, and the driving experience of a user is improved.
According to one embodiment of the invention, determining the current state of the clutch comprises: acquiring an actual speed difference and a target speed difference of a clutch; acquiring a speed difference value between an actual speed difference and a target speed difference; and determining the current state of the clutch according to the speed difference value and the actual micro-slip torque.
According to one embodiment of the invention, determining the current state of the clutch based on the speed differential difference and the actual micro-slip torque comprises: when the speed difference value is larger than a first threshold value and the actual micro-slip torque is larger than the maximum clutch capacity torque value, determining that the current state of the clutch is an overload state; and when the speed difference value is less than or equal to a first threshold value or the actual micro-slip torque is less than or equal to the maximum clutch capacity torque value, determining that the current state of the clutch is a normal state.
According to one embodiment of the invention, the adjusted maximum engine torque threshold is expressed by the following equation:
P＝a×(L-Lr)+b
wherein P is the adjusted maximum engine torque threshold, L is the actual micro-slip torque, LrThe value of the maximum clutch capacity torque is a first preset coefficient, and b is a second preset coefficient.
According to one embodiment of the invention, adjusting the actual torque of the engine based on the adjusted maximum engine torque threshold comprises: and controlling the engine to operate in a torque limit mode according to the adjusted maximum engine torque threshold value.
In order to achieve the above object, a second aspect of the present invention provides a computer-readable storage medium, on which an overload protection program of a clutch is stored, and the overload protection program of the clutch, when executed by a processor, implements an overload protection method of the clutch as in the first aspect of the present invention.
According to the computer-readable storage medium of the embodiment of the invention, by the overload protection method of the clutch, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, so that the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, and in the whole overload protection process, the clutch is not required to be opened, so that the power transmission interruption is avoided, and the driving experience of a user is improved.
In order to achieve the above object, an embodiment of a third aspect of the invention proposes a vehicle including: the overload protection method for the clutch according to the embodiment of the first aspect is implemented when the processor executes the program.
According to the vehicle provided by the embodiment of the invention, through the overload protection method of the clutch, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, so that the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, and in the whole overload protection process, the clutch is not required to be opened, so that the power transmission interruption is avoided, and the driving experience of a user is improved.
In order to achieve the above object, a fourth aspect of the present invention provides an overload protection apparatus for a clutch, including: the acquisition module is used for acquiring the actual micro-slip torque of the clutch; a determination module to determine a current state of the clutch; and the control module is used for responding to the current state as an overload state, adjusting the maximum engine torque threshold value of the transmission according to the actual micro-slip torque, and adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value.
According to the overload protection device of the clutch, the actual micro-slip torque of the clutch is obtained through the obtaining module, the current state of the clutch is determined through the determining module, when the current state of the clutch is the overload state, the maximum engine torque threshold value of the transmission is adjusted through the control module according to the actual micro-slip torque, and the actual torque of the engine is adjusted according to the adjusted maximum engine torque threshold value. Therefore, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, the clutch does not need to be opened in the whole overload protection process, the power transmission interruption is avoided, and the driving experience of a user is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a method of overload protection for a clutch according to one embodiment of the present invention;
FIG. 2 is a flow chart for determining a current state of a clutch according to one embodiment of the present invention;
fig. 3 is a schematic structural view of an overload protection apparatus of a clutch according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An overload protection method and apparatus for a clutch, a vehicle, and a storage medium according to embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a flowchart of an overload protection method of a clutch according to an embodiment of the present invention. As shown in fig. 1, the overload protection method of the clutch includes the following steps:
and step S101, acquiring the actual micro-slip torque of the clutch.
It should be noted that there are three working states between the engine and the clutch, which are the full linkage state of the engine and the clutch, the non-linkage state of the engine and the clutch, and the semi-linkage state of the engine and the clutch, when the engine and the clutch are in the full linkage state, the clutch pressure plate is pressed tightly against the flywheel friction plate, the friction force between the pressure plate and the friction plate is the largest, the input shaft of the engine and the output shaft of the clutch keep relative static friction, and the rotating speeds of the two are the same; when the engine and the clutch are in a non-linkage state, the pressure plate is separated from the friction plate, the pressure plate and the friction plate are not contacted completely, and relative friction does not exist; when the engine and the clutch are in a semi-linkage state, the clutch pressure plate is in contact with the flywheel friction plate, but the pressure of the clutch pressure plate pressing against the flywheel friction plate is small, so that relative sliding friction can be generated between the clutch pressure plate and the flywheel friction plate.
Specifically, when the engine and the clutch are in a semi-linkage state, the clutch pressure plate and the flywheel friction plate start to be combined, the slip friction torque transmitted by the clutch pressure plate is continuously increased along with the gradual increase of the pressing force of the clutch pressure plate, the rotating speed of the output shaft of the clutch is continuously increased, the angular speed of the engine is reduced to some extent, the clutch pressure plate and the flywheel friction plate are in a micro-slip friction state, and the acquired clutch transmission torque is the actual micro-slip friction torque of the clutch.
In step S102, the current state of the clutch is determined.
It should be noted that the clutch is in different working states due to torque transmission during working, the clutch is in a normal state when the clutch normally transmits output torque, and the clutch is in an overload state when the output torque of the clutch transmission system is too large, and the current state of the clutch needs to be determined in order to ensure the normal operation of the clutch and avoid the ablation or damage of the clutch due to overload.
Specifically, in some embodiments, as shown in FIG. 2, determining the current state of the clutch includes:
step S201, acquiring an actual speed difference and a target speed difference of a clutch;
specifically, when the clutch pressure plate and the flywheel friction plate start to be combined, the clutch pressure plate and the flywheel friction plate are in a slight slip state, a rotation speed difference is allowed between a power input end and a power output end of the clutch, the obtained rotation speed difference in the slight slip state is an actual speed difference of the clutch, a target speed difference is an expected speed difference in the slight slip state of the clutch, the expected speed difference is an optimal rotation speed difference between the power input end and the power output end of the clutch, and the target speed difference can be obtained through experimental tests and is preset in a clutch control system.
Step S202, acquiring a speed difference value between an actual speed difference and a target speed difference;
specifically, when the clutch pressure plate and the flywheel friction plate are in a micro-slip state, a differential difference value between an actual differential speed and a target differential speed is obtained in real time according to the obtained actual differential speed of the clutch and a preset target differential speed.
And step S203, determining the current state of the clutch according to the speed difference value and the actual micro-slip torque.
Specifically, the current working state of the clutch is judged according to the speed difference value of the actual speed difference and the target speed difference of the clutch in the micro-slip friction state and the actual micro-slip friction torque, whether the clutch is in the normal running state or not can be detected in real time, and necessary measures are timely taken to avoid excessive ablation or damage of the clutch when the clutch is in the abnormal working state.
Further, in some embodiments, determining the current state of the clutch based on the speed differential difference and the actual micro-slip torque includes: when the speed difference value is larger than a first threshold value and the actual micro-slip torque is larger than the maximum clutch capacity torque value, determining that the current state of the clutch is an overload state; and when the speed difference value is less than or equal to a first threshold value or the actual micro-slip torque is less than or equal to the maximum clutch capacity torque value, determining that the current state of the clutch is a normal state.
Specifically, when other power sources intervene, the actual torque provided by the engine and the other power sources gradually approaches a threshold value of the maximum engine torque allowed by the transmission, at this time, the actual micro-slip friction torque of the clutch gradually increases, and due to reasons such as insufficient hydraulic pump capacity or processing errors of hydraulic system hardware, the actual micro-slip friction torque of the clutch exceeds a maximum clutch capacity torque value, if the differential speed difference value of the clutch at this time is also greater than a first threshold value, that is, the differential speed difference value between the actual differential speed of the clutch and the target differential speed is too large, it is indicated that the actual torque borne by the clutch is too large, the clutch may be changed from a micro-slip friction working condition to a large-slip friction working condition, the clutch may be overheated, and at this time, it is determined that the clutch is in an overload state; if the speed difference value of the actual speed difference and the target speed difference of the clutch is smaller than or equal to a first threshold value, or the actual micro-slip torque is smaller than or equal to the maximum clutch capacity torque value, it is indicated that the vehicle power input torque is normal, the clutch can bear the current actual input torque, and at this time, the clutch is determined to be in a normal state.
Therefore, the current state of the clutch is determined by acquiring the speed difference value of the actual speed difference and the target speed difference of the clutch and the size relation between the actual micro-slip torque and the maximum clutch capacity torque value in real time, the working condition of the clutch can be pre-judged, and the clutch is reminded to enter an overload state.
And step S103, responding to the current state as an overload state, and adjusting the maximum engine torque threshold value of the transmission according to the actual micro-friction torque.
Specifically, when the current state of the clutch is determined to be an overload state, the maximum engine torque threshold of the transmission is adjusted based on the actual microsliding torque of the clutch and the maximum clutch capacity torque value.
Further, the adjusted maximum engine torque threshold is expressed by the following equation:
P＝a×(L-Lr)+b
wherein P is the adjusted maximum engine torque threshold, L is the actual micro-slip torque, LrAnd a is a first preset coefficient, and b is a second preset coefficient, wherein the value of the maximum clutch capacity torque is the first preset coefficient.
That is to say, when the clutch is in an overload state, the maximum engine torque threshold of the clutch is adjusted according to a preset calculation method through the obtained actual micro-slip torque and the preset maximum clutch capacity torque value, it should be noted that the maximum engine torque threshold of the transmission obtained through the calculation method is firstly decreased and then increased, wherein the maximum engine torque threshold does not exceed the original maximum engine torque threshold in the increasing process, that is, the adjusted maximum engine torque threshold is always smaller than the original maximum engine torque threshold.
And step S104, adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value.
Specifically, the adjusted maximum engine torque threshold of the clutch is fed back to an engine control system, and the engine control system adjusts the real-time output torque of the engine according to the maximum engine torque threshold updated in real time, so that the clutch is restored to a normal working state, and the clutch is prevented from being ablated or damaged due to overheating.
In some embodiments, adjusting the actual torque of the engine based on the adjusted maximum engine torque threshold comprises: and controlling the engine to operate in a torque limit mode according to the adjusted maximum engine torque threshold value.
That is, the real-time output torque of the engine is limited according to the maximum engine torque threshold value updated in real time, so as to ensure that the actual torque of the engine is always smaller than the maximum engine torque threshold value, because the adjusted maximum engine torque threshold value of the transmission is decreased and then increased, when the maximum engine torque threshold value is gradually decreased, the actual torque of the engine is also decreased, when the maximum engine torque threshold value of the transmission is gradually increased, the actual torque of the engine is gradually recovered to be normal, because the adjusted maximum engine torque threshold value is always smaller than or equal to the original maximum engine torque threshold value, the adjusted actual torque of the engine is always smaller than or equal to the original actual torque of the engine, the input torque transmitted to the clutch is also decreased, the speed difference value and the actual micro-slip torque of the clutch are recovered to be within a reasonable range, the clutch is gradually restored to a normal state.
Therefore, the clutch can be protected by adjusting the actual torque of the engine, the clutch is prevented from being ablated or damaged due to overheating, and in the whole adjusting process, the clutch is always in a combined state, and the power transmission interruption caused by the clutch opening does not occur.
In summary, according to the overload protection method for the clutch in the embodiment of the present invention, the actual micro-slip torque of the clutch is obtained, the current state of the clutch is determined, when the current state of the clutch is the overload state, the maximum engine torque threshold of the transmission is adjusted according to the actual micro-slip torque, and the actual torque of the engine is adjusted according to the adjusted maximum engine torque threshold. Therefore, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, the clutch does not need to be opened in the whole overload protection process, the power transmission interruption is avoided, and the driving experience of a user is improved.
Embodiments of the present invention also provide a computer-readable storage medium on which an overload protection program of a clutch is stored, the overload protection program of the clutch implementing the overload protection method of the clutch in the above-described embodiments when executed by a processor.
According to the computer-readable storage medium of the embodiment of the invention, by the overload protection method of the clutch, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, so that the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, and in the whole overload protection process, the clutch is not required to be opened, so that the power transmission interruption is avoided, and the driving experience of a user is improved.
Embodiments of the present invention also provide a vehicle, including: the overload protection method for the clutch comprises a memory, a processor and an overload protection program of the clutch, wherein the overload protection program of the clutch is stored in the memory and can run on the processor, and when the processor executes the program, the overload protection method for the clutch in the embodiment is realized.
According to the vehicle provided by the embodiment of the invention, through the overload protection method of the clutch, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, so that the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, and in the whole overload protection process, the clutch is not required to be opened, so that the power transmission interruption is avoided, and the driving experience of a user is improved.
Fig. 3 is a schematic structural view of an overload protection apparatus of a clutch according to an embodiment of the present invention. As shown in fig. 3, the overload protection apparatus 100 for a clutch includes: an acquisition module 110, a determination module 120, and a control module 130.
The obtaining module 110 is configured to obtain an actual micro-slip torque of the clutch; the determination module 120 is used to determine the current state of the clutch; the control module 130 is configured to adjust a maximum engine torque threshold of the transmission based on the actual micro-slip torque and adjust an actual torque of the engine based on the adjusted maximum engine torque threshold in response to the current state being an overload state.
In some embodiments, the determining module 120 is further specifically configured to: acquiring an actual speed difference and a target speed difference of a clutch; acquiring a speed difference value between an actual speed difference and a target speed difference; and determining the current state of the clutch according to the speed difference value and the actual micro-slip torque.
In some embodiments, the determining module 120 is further specifically configured to: when the speed difference value is larger than a first threshold value and the actual micro-slip torque is larger than the maximum clutch capacity torque value, determining that the current state of the clutch is an overload state; and when the speed difference value is less than or equal to a first threshold value or the actual micro-slip torque is less than or equal to the maximum clutch capacity torque value, determining that the current state of the clutch is a normal state.
In some embodiments, the adjusted maximum engine torque threshold is expressed by the following equation:
P＝a×(L-Lr)+b
wherein P is the adjusted maximum engine torque threshold, L is the actual micro-slip torque, LrTo the maximum clutchAnd the capacity torque value a is a first preset coefficient, and b is a second preset coefficient.
In some embodiments, the control module 130 is specifically configured to: and controlling the engine to operate in a torque limit mode according to the adjusted maximum engine torque threshold value.
It should be noted that, for the description of the overload protection apparatus for a clutch in the present application, please refer to the description of the overload protection method for a clutch in the present application, and details are not repeated herein.
According to the overload protection device of the clutch, the actual micro-slip torque of the clutch is obtained through the obtaining module, the current state of the clutch is determined through the determining module, when the current state of the clutch is the overload state, the maximum engine torque threshold value of the transmission is adjusted through the control module according to the actual micro-slip torque, and the actual torque of the engine is adjusted according to the adjusted maximum engine torque threshold value. Therefore, when the clutch is in an overload state, the actual torque of the engine is adjusted by adjusting the maximum engine torque threshold value, the clutch can be protected, the clutch is prevented from being ablated or damaged due to overheating, the clutch does not need to be opened in the whole overload protection process, the power transmission interruption is avoided, and the driving experience of a user is improved.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. A method of overload protection for a clutch, comprising:
acquiring actual micro-slip torque of the clutch;
determining a current state of the clutch;
in response to the current state being an overload state, adjusting a maximum engine torque threshold of a transmission in accordance with the actual micro-slip torque;
and adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value.
2. The method of claim 1, wherein said determining the current state of the clutch comprises:
acquiring an actual speed difference and a target speed difference of the clutch;
acquiring a speed difference value between the actual speed difference and the target speed difference;
and determining the current state of the clutch according to the speed difference value and the actual micro-slip torque.
3. The method of claim 2, wherein determining the current state of the clutch based on the speed differential difference value and the actual creep torque comprises:
when the speed difference value is larger than a first threshold value and the actual micro-slip torque is larger than a maximum clutch capacity torque value, determining that the current state of the clutch is an overload state;
and when the speed difference value is less than or equal to the first threshold value or the actual micro-slip torque is less than or equal to the maximum clutch capacity torque value, determining that the current state of the clutch is a normal state.
4. The method of claim 1, wherein the adjusted maximum engine torque threshold is expressed by the following equation:
P＝a×(L-Lr)+b
wherein P is the adjusted maximum engine torque threshold, L is the actual micro-slip torque, LrThe value of the maximum clutch capacity torque is a first preset coefficient, and b is a second preset coefficient.
5. The method of claim 1, wherein adjusting the actual torque of the engine based on the adjusted maximum engine torque threshold comprises:
and controlling the engine to operate in a torque limit mode according to the adjusted maximum engine torque threshold value.
6. A computer-readable storage medium, characterized in that an overload protection program of a clutch is stored thereon, which when executed by a processor implements an overload protection method of a clutch according to any one of claims 1 to 5.
7. A vehicle, characterized by comprising: memory, processor and overload protection program for a clutch stored on the memory and operable on the processor, which when executed by the processor implements a method for overload protection of a clutch according to any one of claims 1 to 5.
8. An overload protection apparatus for a clutch, comprising:
the acquisition module is used for acquiring the actual micro-slip torque of the clutch;
a determination module to determine a current state of the clutch;
and the control module is used for responding to the current state as an overload state, adjusting the maximum engine torque threshold value of the transmission according to the actual micro-slip torque, and adjusting the actual torque of the engine according to the adjusted maximum engine torque threshold value.
CN202210179196.XA 2022-02-25 2022-02-25 Overload protection method and device for clutch, vehicle and storage medium Active CN114526295B (en)

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