CN116123228A

CN116123228A - Method and device for determining oil filling time of clutch, storage medium and processor

Info

Publication number: CN116123228A
Application number: CN202310092728.0A
Authority: CN
Inventors: 闫金森; 孙晓鹏; 刘中秀; 王国栋
Original assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Current assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-05-16

Abstract

The application provides a method and a device for determining oil filling time of a clutch, a storage medium and a processor. The determining method comprises the following steps: acquiring a first gear shifting impact degree of a vehicle in a current gear shifting process; acquiring working condition parameters of the clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value, wherein the working condition parameters comprise a first hydraulic pump outlet pressure curve of the clutch in a pre-charging stage, a target parameter value and a second gear shifting impact degree, and a second hydraulic pump outlet pressure curve of the clutch in a torque phase stage; based on working condition parameters of the clutch in the current gear shifting process, whether the clutch is in a target state or not is determined, and under the condition that the clutch is in the target state, the target oil filling time is determined based on the current oil temperature of the gearbox and the rotating speed of the engine, so that the problem that the determination of the oil filling time of the clutch in the prior art is unreasonable is solved.

Description

Method and device for determining oil filling time of clutch, storage medium and processor

Technical Field

The present disclosure relates to the field of clutch technologies, and in particular, to a method and an apparatus for determining oil filling time of a clutch, a computer readable storage medium, and a processor.

Background

In a gear shifting stage of the vehicle, the clutch is required to be filled with oil, so that the gear shifting impact degree of the vehicle in the gear shifting process is reduced. However, during actual application, both the under-and over-filled clutch oil can affect the shift quality of an HMCVT (hydromechanical continuously variable transmission, hydro-mechanical Continuously Variable Transmission, HMCVT for short). Meanwhile, the viscosity of oil is easily affected by temperature, and the problems of abrasion, aging and the like of the clutch are continuously caused in the using process, so that the clutch is pre-filled with oil by adopting fixed oil filling time, and the clutch is obviously unreasonable.

Therefore, there is a need for a method that can more reasonably determine the oil fill time of a clutch.

Disclosure of Invention

The main objective of the present application is to provide a method and a device for determining oil filling time of a clutch, a computer readable storage medium and a processor, so as to at least solve the problem that the determination of the oil filling time of the clutch is not reasonable in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a method for determining oil charge time of a clutch, including: acquiring a first gear shifting impact degree of a vehicle in a current gear shifting process, wherein the first gear shifting impact degree is the gear shifting impact degree in the whole gear shifting process at present; acquiring working condition parameters of a clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value, wherein the working condition parameters comprise a first hydraulic pump outlet pressure curve of the clutch in a pre-charging stage, a target parameter value and a second gear shifting impact degree, and a second hydraulic pump outlet pressure curve of the clutch in a torque phase stage, and the target parameter value is determined at least based on an actual pressure value and a required pressure value of the clutch; determining whether the clutch is in a target state based on the working condition parameters of the clutch in the current gear shifting process, and determining a target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine under the condition that the clutch is in the target state, wherein the target state comprises at least one of the following steps: an under-filled state and an over-filled state.

Optionally, when the target state is the under-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch during the current gear shift includes: determining that the clutch is in the under-filled condition if the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and the target parameter value is less than a second predetermined threshold, wherein the first preset condition includes at least one of: the slope of the second hydraulic pump outlet pressure curve is greater than a first slope value, the slope of the second hydraulic pump outlet pressure curve is less than a second slope value, and the first slope value is greater than the second slope value.

Optionally, when the target state is the oil-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch during the current gear shift includes: and determining that the clutch is in the oil-over state when the slope of the first hydraulic pump outlet pressure curve meets a second preset condition and the second shift shock is greater than a third preset threshold, wherein the second preset condition comprises at least one of the following: the slope of the first hydraulic pump outlet pressure curve is greater than a third slope value, the slope of the first hydraulic pump outlet pressure curve is less than a fourth slope value, and the third slope value is greater than the fourth slope value.

Optionally, determining the target parameter value based at least on the actual pressure value and the demand pressure value of the clutch includes: by using

Calculating the target parameter value, wherein ζ is the target parameter value, T is the pre-charging time of the clutch in the current gear shifting process, and T ₀ For the initial moment of filling the clutch with oil during the current gear shifting process, P _des For the required pressure value, P _act Is the actual pressure value.

Optionally, determining the target oil charge time based on the current oil temperature of the gearbox and the rotational speed of the engine with the clutch in the target state includes: and under the condition that the clutch is in the target state, adopting a table look-up method and determining the target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine.

Optionally, after determining the target oil-filled time based on the current oil temperature of the transmission and the rotational speed of the engine with the clutch in the target state, the determining method further includes: updating the oil filling time curve by adopting the target oil filling time to obtain an updated oil filling time curve; and in the next gear shifting process, determining the oil filling time of the clutch based on the updated oil filling time curve, and filling the clutch with oil based on the determined oil filling time of the clutch.

Optionally, after filling the clutch based on the determined oil filling time of the clutch, the determining method further includes: acquiring a third gear shifting impact degree in the next whole gear shifting process; under the condition that the third gear shifting impact degree is smaller than the first gear shifting impact degree, the updated oil filling time curve is stored; and under the condition that the third gear shifting impact degree is larger than or equal to the first gear shifting impact degree, storing the oil filling time curve which is not updated.

According to another aspect of the present application, there is provided a device for determining oil charge time of a clutch, including: the first acquisition unit is used for acquiring a first gear shifting impact degree of the vehicle in the current gear shifting process, wherein the first gear shifting impact degree is the gear shifting impact degree in the whole gear shifting process at present; a second obtaining unit, configured to obtain, when the first shift impact degree is greater than a first predetermined threshold value, a working condition parameter of a clutch during the current shift, where the working condition parameter includes a first hydraulic pump outlet pressure curve of the clutch during a pre-charge phase, a target parameter value, and a second shift impact degree, and the second hydraulic pump outlet pressure curve of the clutch during a torque phase, where the target parameter value is determined based at least on an actual pressure value and a demand pressure value of the clutch; a determining unit, configured to determine, based on the operating condition parameter of the clutch during the current gear shifting process, whether the clutch is in a target state, where, when the clutch is in the target state, a target oil filling time is determined based on a current oil temperature of a gearbox and a rotational speed of an engine, and the target state includes at least one of: an under-filled state and an over-filled state.

According to still another aspect of the present application, there is provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, the device in which the computer readable storage medium is controlled to execute any one of the methods for determining the oil filling time of the clutch.

According to still another aspect of the present application, there is provided a processor for running a program, wherein the program executes any one of the methods for determining the oil charge time of the clutch.

By applying the technical scheme, first, the first gear shifting impact degree of the vehicle in the current whole gear shifting process is obtained; then, under the condition that the first gear shifting impact degree is larger than a first preset threshold value, working condition parameters of the clutch in the current gear shifting process are obtained; and finally, determining whether the clutch is in a target state according to the acquired working condition parameters. And under the condition that the clutch is in a target state, determining target oil filling time according to the current oil temperature of the gearbox and the rotating speed of the engine. Compared with the prior art that the fixed oil filling time is adopted for filling oil to the clutch, the method and the device for controlling the gear shifting of the clutch have the advantages that whether the clutch is in the target state or not is determined based on the working condition parameters in the current gear shifting process under the condition that the first gear shifting impact degree is larger than the first preset threshold value, so that the fact that whether the clutch is in the over-oil filling state or the under-oil filling state in the current gear shifting process can be accurately determined is guaranteed. And the target oil filling time of the clutch is determined based on the target state of the clutch, so that the dynamic adjustment of the target oil filling time is realized, the determination of the target oil filling time is ensured to be more reasonable, the problem that the determination of the oil filling time of the clutch is more unreasonable in the prior art is solved, and the gear shifting quality of a vehicle is further ensured to be better.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a block diagram of a hardware structure of a mobile terminal for performing a method for determining oil-filled time of a clutch according to an embodiment of the present application;

FIG. 2 is a flow chart illustrating a method for determining oil fill time of a clutch according to an embodiment of the present disclosure;

FIG. 3 illustrates a schematic diagram of a normal upshift of the HMCVT provided by an embodiment of the present application;

FIG. 4 illustrates a schematic diagram of a clutch under-filled condition at upshifting of an HMCVT provided by an embodiment of the present application;

FIG. 5 illustrates a schematic diagram of a clutch over-charge condition at upshifting of an HMCVT provided by an embodiment of the present application;

FIG. 6 is a flow chart illustrating another method for determining oil fill time of a clutch according to an embodiment of the present application;

fig. 7 shows a schematic structural diagram of a device for determining oil filling time of a clutch according to an embodiment of the present application.

Wherein the above figures include the following reference numerals:

102. A processor; 104. a memory; 106. a transmission device; 108. an input-output device; 300. a pre-charging stage; 301. a rotational speed phase stage; 302. a torque phase stage; 303. a shift jerk curve; 304. a first outlet pressure curve; 305. a first bump area; 306. a second mutation region; 10. a first acquisition unit; 20. a second acquisition unit; 30. and a determining unit.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of description, the following will describe some terms or terms related to the embodiments of the present application:

HMCVT: the hydraulic mechanical stepless speed changing box (Hydro-mechanical Continuously Variable Transmission, abbreviated as HMCVT) is used for dividing the power input by an engine, one path of the power is transmitted through a fixed gear, the other path of the power is transmitted through a pump-controlled motor system, and two paths of power are converged by a planet row. And then the power output of different sections is realized by combining different clutches, so that the gearbox is a gearbox with high efficiency and continuously adjustable hydraulic transmission for comprehensive mechanical transmission.

Clutch prefill oil: before the wet clutch performs sliding friction control, oil needs to be filled in advance to eliminate idle stroke between the friction plate and the dual steel plate so as to reduce gear shifting impact.

Shift shock: acceleration rate of the vehicle during a shift.

As described in the background art, the prior art has less reasonable determination of the oil filling time of the clutch, and in order to solve the above problem, embodiments of the present application provide a method, a device, a computer readable storage medium and a processor for determining the oil filling time of the clutch.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to a method for determining oil-filled time of a clutch according to an embodiment of the present invention. As shown in fig. 1, a mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.

The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a display method of device information in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, to implement the above-described method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.

In this embodiment, a method for determining the oil charge time of a clutch operating on a mobile terminal, a computer terminal or a similar computing device is provided, and it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical sequence is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in a different order than that illustrated herein.

FIG. 2 is a flow chart of a method of determining oil fill time for a clutch according to an embodiment of the present application. As shown in fig. 2, the determination method includes the steps of:

step S201, acquiring a first gear shifting impact degree of a vehicle in a current gear shifting process, wherein the first gear shifting impact degree is the gear shifting impact degree in the whole gear shifting process;

specifically, the shift process described above may be a process of adjusting from one gear to another.

Specifically, the shift shock is a rate of change of acceleration of the vehicle during a current shift.

Step S202, acquiring working condition parameters of the clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value, wherein the working condition parameters comprise a first hydraulic pump outlet pressure curve of the clutch in a pre-charging stage, a target parameter value and a second gear shifting impact degree, and a second hydraulic pump outlet pressure curve of the clutch in a torque phase stage, and the target parameter value is determined at least based on an actual pressure value and a required pressure value of the clutch;

Specifically, the first hydraulic pump outlet pressure curve is a curve of an outlet pressure of a hydraulic pump of the hydromechanical continuously variable transmission. The second hydraulic pump outlet pressure curve is a curve of the outlet pressure of a hydraulic pump of the hydromechanical continuously variable transmission. However, the first hydraulic pump outlet pressure curve and the second hydraulic pump outlet pressure curve are curves of outlet pressures of hydraulic pumps of clutches in different oil filling stages.

Specifically, the second shift shock degree is a shift shock degree of the clutch in a pre-charging stage in the oil charging process.

Specifically, the first predetermined threshold may be flexibly set according to the actual situation. In the present application, the magnitude of the first predetermined threshold is not limited.

Step S203, determining whether the clutch is in a target state based on the working condition parameters of the clutch during the current gear shifting process, where the target state includes at least one of the following: an under-filled state and an over-filled state.

Specifically, the target oil filling time is the oil filling time of the clutch in the pre-filling stage.

Specifically, the clutch may be a wet clutch.

Through the embodiment, first, a first gear shifting impact degree of a vehicle in the current whole gear shifting process is obtained; then, under the condition that the first gear shifting impact degree is larger than a first preset threshold value, working condition parameters of the clutch in the current gear shifting process are obtained; and finally, determining whether the clutch is in a target state according to the acquired working condition parameters. And under the condition that the clutch is in a target state, determining target oil filling time according to the current oil temperature of the gearbox and the rotating speed of the engine. Compared with the prior art that the fixed oil filling time is adopted for filling oil to the clutch, the method and the device for controlling the gear shifting of the clutch have the advantages that whether the clutch is in the target state or not is determined based on the working condition parameters in the current gear shifting process under the condition that the first gear shifting impact degree is larger than the first preset threshold value, so that the fact that whether the clutch is in the over-oil filling state or the under-oil filling state in the current gear shifting process can be accurately determined is guaranteed. And the target oil filling time of the clutch is determined based on the target state of the clutch, so that the dynamic adjustment of the target oil filling time is realized, the determination of the target oil filling time is ensured to be more reasonable, the problem that the determination of the oil filling time of the clutch is more unreasonable in the prior art is solved, and the gear shifting quality of a vehicle is further ensured to be better.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

In the prior art, HMCVT consists of a planetary gear transmission and a hydrostatic transmission. It differs from the conventional AMT (automatic transmission of electronic control mechanical type, automated Mechanical Transmission, abbreviated as AMT) or AT (automatic transmission, automatic Transmission, abbreviated as AT) in that: HMCVT have regulation of the hydraulic unit during the shift phase. In particular, the feedback may be performed by the outlet pressure of the hydraulic pump (the first outlet pressure curve 304 as shown in fig. 3, in particular the first outlet pressure curve 304 being the pressure curve at the high pressure outlet of the hydraulic pump). In the shifting process of the vehicle, taking the shift impact (specifically, the shift impact curve 303 shown in fig. 3) as a judging index, and taking the case of first gear up to second gear up, the shifting process of the whole vehicle can be divided into three stages, namely, a pre-charge stage 300, a rotation speed phase stage 301 and a torque phase stage 302, which are shown in fig. 3. The pre-charge stage 300 is to pre-charge the wet clutch to reduce shift shock. The process of pre-filling the wet clutch in the pre-fill phase 300 may be further divided into a fast fill phase and a slow fill phase. The purpose of the fast oil filling stage is to shorten the overall gear shifting time, and the purpose of the slow oil filling stage is to ensure that the clutch is filled with oil to a KP (half junction Point of the clutch, KP for short). In the rotational speed phase stage 301, the pressure value of the clutch is slightly increased, and meanwhile, the swing angle of the hydraulic pump is adjusted, so that the rotational speeds of the master end and the slave end of the 2-gear clutch tend to be consistent. As for the torque phase stage 302, since the rotational speed phase stage 301 has made the clutch master-slave end rotational speeds substantially uniform, the stage mainly increases the pressure in the 2 nd clutch, so that the clutch is compressed.

In the clutch under-filled condition, there may be a gap inside the clutch due to insufficient pre-filling of the clutch. After the clutch enters the torque phase 302, the clutch force may collide, causing a sudden increase in the clutch torque, which in turn causes a sudden increase in the line out of the first outlet pressure curve 304, see in particular the first sudden increase region 305 in fig. 4. The quick oil filling time of the pre-filling stage (namely, the oil filling time of the quick oil filling stage in the pre-filling stage) can also assist in judging whether the clutch is in an underfilled state, and the pressure following in the 2-gear clutch is slower, namely, the quick oil filling time is shorter.

In the state that the clutch is over-filled, as shown in fig. 5, since the oil filling time of the clutch in the pre-filling stage is too long, viscous linking occurs at the master end and the slave end of the clutch during the gear shifting, so that the clutch transmits torque in the pre-filling stage, and the first outlet pressure curve 304 is caused to suddenly increase, specifically, the second sudden increase area 306 in fig. 5 can be seen, and multiple shocks may occur in one gear shifting.

In a specific implementation process, the step S203 may be implemented by the following steps: when the target state is the oil shortage state, determining whether the clutch is in the target state based on the working condition parameter of the clutch in the current gear shifting process includes: and determining that the clutch is in the oil-starved state when the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and the target parameter value is smaller than a second preset threshold, wherein the first preset condition comprises at least one of the following: the slope of the second hydraulic pump outlet pressure curve is greater than a first slope value, the slope of the second hydraulic pump outlet pressure curve is less than a second slope value, and the first slope value is greater than the second slope value. In this embodiment, the target state of the clutch is determined based on the slope of the second hydraulic pump outlet pressure curve of the clutch during the current shift, the torque phase, and the target parameter value, thus ensuring that it is possible to more accurately determine whether the clutch is in an underfilled state. And then, under the condition that the clutch is in an underfilled state, determining the target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine, further ensuring that the determined target oil filling time is reasonable and further ensuring that the gear shifting quality of the vehicle is good.

Specifically, the slope of the second hydraulic pump outlet pressure curve is greater than the first slope value, which is used to indicate that the pressure value of the hydraulic pump outlet increases more rapidly in the torque phase stage when the pressure value of the hydraulic pump outlet is suddenly increased in the torque phase stage, that is, when the slope of the second hydraulic pump outlet pressure curve is greater than the first slope value; the slope of the second hydraulic pump outlet pressure curve is smaller than the second slope value, which is used for representing the situation that the pressure value of the hydraulic pump outlet is suddenly reduced in the torque phase stage, that is, the slope of the second hydraulic pump outlet pressure curve is smaller than the second slope value, so that the pressure value of the hydraulic pump outlet is relatively sharply reduced in the torque phase stage. Specifically, the first slope value is a positive value and the second slope value is a negative value.

Specifically, the second predetermined threshold may be flexibly set according to the actual situation. In the present application, the magnitude of the second predetermined threshold is not limited.

In an actual application process, when the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and the target parameter value is smaller than a second preset threshold value, determining that the clutch is in the oil shortage state includes: determining a first weight value of which the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and a second weight value of which the target parameter value is smaller than a second preset threshold value; determining a first target weight value based on the first weight value and the second weight value; and determining that the clutch is in an under-filled state if the first target weight value is greater than a fourth predetermined threshold.

In order to more accurately determine the target state of the clutch and further ensure that the oil filling time of the clutch determined later is more reasonable, the step S203 of the present application may be implemented by the following steps: when the target state is the oil-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch in the current gear shifting process includes: and determining that the clutch is in the oil-over state when the slope of the first hydraulic pump outlet pressure curve meets a second preset condition and the second shift shock is greater than a third preset threshold, wherein the second preset condition comprises at least one of the following: the slope of the first hydraulic pump outlet pressure curve is greater than a third slope value, the slope of the first hydraulic pump outlet pressure curve is less than a fourth slope value, and the third slope value is greater than the fourth slope value.

Specifically, the slope of the first hydraulic pump outlet pressure curve is greater than the third slope value, which is used to indicate that the pressure value of the hydraulic pump outlet increases more rapidly in the pre-charging stage when the pressure value of the hydraulic pump outlet is suddenly increased in the pre-charging stage, that is, when the slope of the first hydraulic pump outlet pressure curve is greater than the third slope value; the slope of the first hydraulic pump outlet pressure curve is smaller than the fourth slope value, so as to represent the situation that the pressure value of the hydraulic pump outlet is suddenly reduced in the pre-charging stage, that is, in the case that the slope of the first hydraulic pump outlet pressure curve is smaller than the fourth slope value, the pressure value of the hydraulic pump outlet is relatively sharply reduced in the pre-charging stage. Specifically, the third slope value is a positive value and the fourth slope value is a negative value.

Specifically, in an actual application process, when the slope of the outlet pressure curve of the first hydraulic pump meets a second preset condition and the second shift shock is greater than a third preset threshold, determining that the clutch is in the oil-over state includes: determining a third weight of the slope of the first hydraulic pump outlet pressure curve meeting a second preset condition, and determining a fourth weight of the second shift shock degree being greater than a third preset threshold value; determining a second target weight based on the third weight and the fourth weight; in the event that the second target weight is greater than a fifth predetermined threshold, it is determined that the clutch is in an oil-over state.

Specifically, the fourth predetermined threshold and the fifth predetermined threshold may be flexibly adjusted according to actual application situations. In the present application, the magnitudes of the fourth predetermined threshold and the fifth predetermined threshold are not limited.

Specifically, the third predetermined threshold may be flexibly set according to the actual situation. In the present application, the magnitude of the third predetermined threshold is not limited.

In the actual application process, the response speed of the pressure in the clutch can also be used as an important basis for identification. For example, in an HMCVT, the ratio of the area of the actual pressure value of the upshift clutch to the required pressure value may also be used as a reference factor for the under-filled condition. If the clutch is in an underfilled state, the viscosity of the oil is higher and the response time is slower . In order to determine more accurately whether the clutch is in an oil-starved condition, in one embodiment of the present application, determining the target parameter value based at least on the actual pressure value and the demand pressure value of the clutch includes: by using

Calculating the target parameter value, wherein ζ is the target parameter value, T is the pre-charging time of the clutch during the current gear shift, and T ₀ P is the initial time of filling oil into the clutch in the current gear shifting process _des For the above-mentioned required pressure value, P _act Is the actual pressure value.

In some embodiments, the step S203 may be specifically implemented by the following steps: determining a target oil charge time based on a current oil temperature of the transmission and a rotational speed of the engine with the clutch in the target state, comprising: and when the clutch is in the target state, determining the target oil filling time by adopting a table look-up method based on the current oil temperature of the gearbox and the rotating speed of the engine. In this embodiment, a look-up (i.e., table lookup) is performed from a predetermined table based on the current oil temperature of the transmission and the rotational speed of the engine, thus ensuring that the target oil fill time can be determined relatively easily.

In a specific implementation process, when the clutch is in the target state, after determining the target oil filling time based on the current oil temperature of the gearbox and the rotation speed of the engine, the determining method further includes: updating the oil filling time curve by adopting the target oil filling time to obtain an updated oil filling time curve; and in the next gear shifting process, determining the oil filling time of the clutch based on the updated oil filling time curve, and filling the clutch based on the determined oil filling time of the clutch. In the embodiment, in the next gear shifting process, the oil filling time of the clutch is determined based on the updated oil filling time curve, and the oil filling is performed on the clutch based on the oil filling time of the clutch, so that the determined oil filling time of the clutch in the next gear shifting process is reasonable. Meanwhile, the follow-up can also verify whether the correction of the oil filling time of the clutch is reasonable and correct based on the third gear shifting impact degree in the whole next gear shifting process.

In order to more simply verify whether the correction to the oil filling time of the clutch is reasonable and correct, the determining method further includes, after filling the clutch with oil based on the determined oil filling time of the clutch: acquiring a third gear shifting impact degree in the next whole gear shifting process; storing the updated oil charge time curve under the condition that the third gear shift impact degree is smaller than the first gear shift impact degree; and under the condition that the third gear shifting impact degree is larger than or equal to the first gear shifting impact degree, storing the oil filling time curve which is not updated, namely, storing the oil filling time curve which is not updated by adopting the target oil filling time.

In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the method for determining the oil filling time of the clutch of the present application will be described in detail below with reference to specific embodiments.

The embodiment relates to a specific method for determining oil filling time of a clutch, as shown in fig. 6, comprising the following steps:

step S1: and acquiring a first gear shifting impact degree in the current whole gear shifting process.

Step S2: determining whether the first shift shock is greater than a first predetermined threshold; and under the condition that the first gear shifting impact degree is larger than a first preset threshold value, acquiring working condition parameters in the current gear shifting process.

Step S3: and determining whether the clutch is in a target state or not based on the acquired working condition parameters in the current gear shifting process. Specifically, in the case where the slope of the second hydraulic pump outlet pressure curve satisfies the first preset condition and the target parameter value is smaller than the second preset threshold value, determining that the clutch is in the oil shortage state; and determining that the clutch is in an oil-over state under the condition that the slope of the outlet pressure curve of the first hydraulic pump meets a second preset condition and the second gear shifting impact degree is larger than a third preset threshold value.

Step S4: and under the condition that the clutch is in a target state, determining target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine by adopting a table look-up method.

Step S5: and updating the oil filling time curve by adopting the target oil filling time to obtain an updated oil filling time curve.

Step S6: and in the next gear shifting process, determining the oil filling time of the clutch based on the updated oil filling time curve, and filling the clutch with oil based on the determined oil filling time of the clutch.

Step S7: acquiring a third gear shifting impact degree in the next whole gear shifting process;

step S8: under the condition that the third gear shifting impact degree is smaller than the first gear shifting impact degree, the updated oil filling time curve is stored; and under the condition that the third gear shifting impact degree is larger than or equal to the first gear shifting impact degree, storing an unrefreshed oil filling time curve.

The embodiment of the application also provides a device for determining the oil filling time of the clutch, and the device for determining the oil filling time of the clutch can be used for executing the method for determining the oil filling time of the clutch. The device is used for realizing the above embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

The following describes a device for determining the oil filling time of the clutch according to the embodiment of the present application.

Fig. 7 is a schematic structural diagram of a device for determining oil charge time of a clutch according to an embodiment of the present application. As shown in fig. 7, the determining means includes:

a first acquiring unit 10, configured to acquire a first shift impact degree of the vehicle during a current shift process, where the first shift impact degree is a shift impact degree during the entire shift process;

A second obtaining unit 20, configured to obtain, when the first shift shock is greater than a first predetermined threshold, a working condition parameter of the clutch during the current shift, where the working condition parameter includes a first hydraulic pump outlet pressure curve of the clutch during a pre-charge phase, a target parameter value, and a second shift shock, and the second hydraulic pump outlet pressure curve of the clutch during a torque phase, where the target parameter value is determined based at least on an actual pressure value and a demand pressure value of the clutch;

A determining unit 30, configured to determine whether the clutch is in a target state based on the operating condition parameter of the clutch during the current gear shift, where the target state includes at least one of: an under-filled state and an over-filled state.

Specifically, the clutch may be a wet clutch.

Through the embodiment, the first obtaining unit is used for obtaining a first gear shifting impact degree of the vehicle in the current whole gear shifting process; the second acquisition unit is used for acquiring working condition parameters of the clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value; the determining unit is used for determining whether the clutch is in a target state according to the acquired working condition parameters. And under the condition that the clutch is in a target state, determining target oil filling time according to the current oil temperature of the gearbox and the rotating speed of the engine. Compared with the prior art that the fixed oil filling time is adopted for filling oil to the clutch, the method and the device for controlling the gear shifting of the clutch have the advantages that whether the clutch is in the target state or not is determined based on the working condition parameters in the current gear shifting process under the condition that the first gear shifting impact degree is larger than the first preset threshold value, so that the fact that whether the clutch is in the over-oil filling state or the under-oil filling state in the current gear shifting process can be accurately determined is guaranteed. And the target oil filling time of the clutch is determined based on the target state of the clutch, so that the dynamic adjustment of the target oil filling time is realized, the determination of the target oil filling time is ensured to be more reasonable, the problem that the determination of the oil filling time of the clutch is more unreasonable in the prior art is solved, and the gear shifting quality of a vehicle is further ensured to be better.

In a specific implementation process, the determining unit includes a first determining module, configured to determine that the clutch is in the oil-starved state when the target state is the oil-starved state and the slope of the outlet pressure curve of the second hydraulic pump meets a first preset condition and the target parameter value is smaller than a second preset threshold, where the first preset condition includes at least one of: the slope of the second hydraulic pump outlet pressure curve is greater than a first slope value, the slope of the second hydraulic pump outlet pressure curve is less than a second slope value, and the first slope value is greater than the second slope value. In this embodiment, the target state of the clutch is determined based on the slope of the second hydraulic pump outlet pressure curve of the clutch during the current shift, the torque phase, and the target parameter value, thus ensuring that it is possible to more accurately determine whether the clutch is in an underfilled state. And then, under the condition that the clutch is in an underfilled state, determining the target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine, further ensuring that the determined target oil filling time is reasonable and further ensuring that the gear shifting quality of the vehicle is good.

In an actual application process, the first determining module includes a first determining submodule, a second determining submodule and a third determining submodule, where the first determining submodule is used to determine a first weight value that a slope of the outlet pressure curve of the second hydraulic pump meets a first preset condition and a second weight value that a target parameter value is smaller than a second preset threshold; the second determining submodule is used for determining a first target weight value based on the first weight value and the second weight value; the third determining submodule is used for determining that the clutch is in an oil-shortage state under the condition that the first target weight value is larger than a fourth preset threshold value.

In order to more accurately determine a target state of the clutch and further ensure that the oil filling time of the clutch determined later is more reasonable, the determining unit includes a second determining module, configured to determine that the clutch is in the oil filling state when the slope of the outlet pressure curve of the first hydraulic pump meets a second preset condition and the second shift shock is greater than a third preset threshold, where the second preset condition includes at least one of: the slope of the first hydraulic pump outlet pressure curve is greater than a third slope value, the slope of the first hydraulic pump outlet pressure curve is less than a fourth slope value, and the third slope value is greater than the fourth slope value.

Specifically, in an actual application process, the second determining module includes a fourth determining submodule, a fifth determining submodule and a sixth determining submodule, where the fourth determining submodule is configured to determine a third weight of the slope of the first hydraulic pump outlet pressure curve meeting a second preset condition, and determine a fourth weight of the second shift shock degree being greater than a third preset threshold; the fifth determining submodule is used for determining a second target weight based on the third weight and the fourth weight; the sixth determination submodule is used for determining that the clutch is in an oil-filled state when the second target weight is larger than a fifth preset threshold value.

In the actual application process, the response speed of the pressure in the clutch can also be used as an important basis for identification. For example, in an HMCVT, the ratio of the area of the actual pressure value of the upshift clutch to the required pressure value may also be used as a reference factor for the under-filled condition. If the clutch is in an underfilled state, the viscosity of the oil is generally higher and the response time is slower. In order to determine whether the clutch is in an oil-starved state more accurately, in one embodiment of the present application, the second obtaining unit includes a calculating module for adopting

Calculating the target parameter value, wherein ζ is the target parameter value, and T is the current shift of the clutchPrefill time during gear, t ₀ P is the initial time of filling oil into the clutch in the current gear shifting process _des For the above-mentioned required pressure value, P _act Is the actual pressure value.

In some embodiments, the determining unit further includes a third determining module configured to determine the target oil charge time based on a current oil temperature of the transmission and a rotational speed of the engine using a look-up table when the clutch is in the target state. In this embodiment, a look-up (i.e., table lookup) is performed from a predetermined table based on the current oil temperature of the transmission and the rotational speed of the engine, thus ensuring that the target oil fill time can be determined relatively easily.

In a specific implementation process, the determining device further includes an updating unit and an executing unit, where the updating unit is configured to update an oil-filled time curve by using the target oil-filled time after determining the target oil-filled time based on the current oil temperature of the gearbox and the rotational speed of the engine in the case that the clutch is in the target state, to obtain the updated oil-filled time curve; and the execution unit is used for determining the oil filling time of the clutch based on the updated oil filling time curve in the next gear shifting process and filling the clutch based on the determined oil filling time of the clutch. In the embodiment, in the next gear shifting process, the oil filling time of the clutch is determined based on the updated oil filling time curve, and the oil filling is performed on the clutch based on the oil filling time of the clutch, so that the determined oil filling time of the clutch in the next gear shifting process is reasonable. Meanwhile, the follow-up can also verify whether the correction of the oil filling time of the clutch is reasonable and correct based on the third gear shifting impact degree in the whole next gear shifting process.

In order to more simply verify whether the correction of the oil filling time of the clutch is reasonable and correct, the determining device further comprises a third obtaining unit, a first storage unit and a second storage unit, wherein the third obtaining unit is used for obtaining a third gear shifting impact degree in the next whole gear shifting process after the oil filling of the clutch is carried out based on the determined oil filling time of the clutch; the first storage unit is configured to store the updated oil charge time curve when the third shift impact degree is smaller than the first shift impact degree; and the second storage unit is used for storing the oil-filled time curve which is not updated under the condition that the third gear shifting impact degree is larger than or equal to the first gear shifting impact degree, namely, the oil-filled time curve which is not updated by adopting the target oil-filled time.

The device for determining the oil filling time of the clutch comprises a processor and a memory, wherein the first acquisition unit, the second acquisition unit, the determination unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the problem that the determination of the oil filling time of the clutch is unreasonable in the prior art is solved by adjusting the parameters of the inner core.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

The embodiment of the invention provides a computer readable storage medium, which comprises a stored program, wherein the program is controlled to run so as to control equipment where the computer readable storage medium is positioned to execute the method for determining the oil filling time of the clutch.

Specifically, the method for determining the oil filling time of the clutch comprises the following steps:

Specifically, the clutch may be a wet clutch.

Optionally, when the target state is the oil shortage state, determining whether the clutch is in the target state based on the working condition parameter of the clutch during the current gear shifting process includes: and determining that the clutch is in the oil-starved state when the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and the target parameter value is smaller than a second preset threshold, wherein the first preset condition comprises at least one of the following: the slope of the second hydraulic pump outlet pressure curve is greater than a first slope value, the slope of the second hydraulic pump outlet pressure curve is less than a second slope value, and the first slope value is greater than the second slope value.

Optionally, when the target state is the oil-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch during the current gear shifting process includes: and determining that the clutch is in the oil-over state when the slope of the first hydraulic pump outlet pressure curve meets a second preset condition and the second shift shock is greater than a third preset threshold, wherein the second preset condition comprises at least one of the following: the slope of the first hydraulic pump outlet pressure curve is greater than a third slope value, the slope of the first hydraulic pump outlet pressure curve is less than a fourth slope value, and the third slope value is greater than the fourth slope value.

Optionally, the process of determining the target parameter value based at least on the actual pressure value and the demand pressure value of the clutch includes: by using

Calculating the target parameter value, wherein ζ is the target parameter value, T is the pre-charging time of the clutch during the current gear shift, and T ₀ P is the initial time of filling oil into the clutch in the current gear shifting process _des To get up toThe required pressure value, P _act Is the actual pressure value.

Optionally, when the clutch is in the target state, determining the target oil filling time based on the current oil temperature of the gearbox and the rotation speed of the engine includes: and under the condition that the clutch is in the target state, adopting a table look-up method and determining the target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine.

Optionally, after determining the target oil filling time based on the current oil temperature of the gearbox and the rotation speed of the engine in the case that the clutch is in the target state, the determining method further includes: updating the oil filling time curve by adopting the target oil filling time to obtain an updated oil filling time curve; and in the next gear shifting process, determining the oil filling time of the clutch based on the updated oil filling time curve, and filling the clutch based on the determined oil filling time of the clutch.

Optionally, after filling the clutch based on the determined oil filling time of the clutch, the determining method further includes: acquiring a third gear shifting impact degree in the next whole gear shifting process; storing the updated oil charge time curve under the condition that the third gear shift impact degree is smaller than the first gear shift impact degree; and storing the oil charge time curve which is not updated under the condition that the third gear shift impact degree is larger than or equal to the first gear shift impact degree.

The embodiment of the invention provides a processor which is used for running a program, wherein the method for determining the oil filling time of the clutch is executed when the program runs.

Specifically, the clutch may be a wet clutch.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:

The device herein may be a server, PC, PAD, cell phone, etc.

The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:

It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code executable by computing devices, so that they may be stored in a storage device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that 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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

1) In the method for determining the oil charge time of the clutch, first, a first gear shifting impact degree of a vehicle in the current whole gear shifting process is obtained; then, under the condition that the first gear shifting impact degree is larger than a first preset threshold value, working condition parameters of the clutch in the current gear shifting process are obtained; and finally, determining whether the clutch is in a target state according to the acquired working condition parameters. And under the condition that the clutch is in a target state, determining target oil filling time according to the current oil temperature of the gearbox and the rotating speed of the engine. Compared with the prior art that the fixed oil filling time is adopted for filling oil to the clutch, the method and the device for controlling the gear shifting of the clutch have the advantages that whether the clutch is in the target state or not is determined based on the working condition parameters in the current gear shifting process under the condition that the first gear shifting impact degree is larger than the first preset threshold value, so that the fact that whether the clutch is in the over-oil filling state or the under-oil filling state in the current gear shifting process can be accurately determined is guaranteed. And the target oil filling time of the clutch is determined based on the target state of the clutch, so that the dynamic adjustment of the target oil filling time is realized, the determination of the target oil filling time is ensured to be more reasonable, the problem that the determination of the oil filling time of the clutch is more unreasonable in the prior art is solved, and the gear shifting quality of a vehicle is further ensured to be better.

2) In the device for determining the oil charge time of the clutch, the first acquisition unit is used for acquiring the first gear shift impact degree of the vehicle in the current whole gear shift process; the second acquisition unit is used for acquiring working condition parameters of the clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value; the determining unit is used for determining whether the clutch is in a target state according to the acquired working condition parameters. And under the condition that the clutch is in a target state, determining target oil filling time according to the current oil temperature of the gearbox and the rotating speed of the engine. Compared with the prior art that the fixed oil filling time is adopted for filling oil to the clutch, the method and the device for controlling the gear shifting of the clutch have the advantages that whether the clutch is in the target state or not is determined based on the working condition parameters in the current gear shifting process under the condition that the first gear shifting impact degree is larger than the first preset threshold value, so that the fact that whether the clutch is in the over-oil filling state or the under-oil filling state in the current gear shifting process can be accurately determined is guaranteed. And the target oil filling time of the clutch is determined based on the target state of the clutch, so that the dynamic adjustment of the target oil filling time is realized, the determination of the target oil filling time is ensured to be more reasonable, the problem that the determination of the oil filling time of the clutch is more unreasonable in the prior art is solved, and the gear shifting quality of a vehicle is further ensured to be better.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for determining oil fill time of a clutch, comprising:

acquiring a first gear shifting impact degree of a vehicle in a current gear shifting process, wherein the first gear shifting impact degree is the gear shifting impact degree in the whole gear shifting process at present;

acquiring working condition parameters of a clutch in the current gear shifting process under the condition that the first gear shifting impact degree is larger than a first preset threshold value, wherein the working condition parameters comprise a first hydraulic pump outlet pressure curve of the clutch in a pre-charging stage, a target parameter value and a second gear shifting impact degree, and a second hydraulic pump outlet pressure curve of the clutch in a torque phase stage, and the target parameter value is determined at least based on an actual pressure value and a required pressure value of the clutch;

determining whether the clutch is in a target state based on the working condition parameters of the clutch in the current gear shifting process, and determining a target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine under the condition that the clutch is in the target state, wherein the target state comprises at least one of the following steps: an under-filled state and an over-filled state.

2. The determination method according to claim 1, wherein, in the case where the target state is the under-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch during the current shift includes:

determining that the clutch is in the under-filled condition if the slope of the second hydraulic pump outlet pressure curve meets a first preset condition and the target parameter value is less than a second predetermined threshold, wherein the first preset condition includes at least one of: the slope of the second hydraulic pump outlet pressure curve is greater than a first slope value, the slope of the second hydraulic pump outlet pressure curve is less than a second slope value, and the first slope value is greater than the second slope value.

3. The determination method according to claim 1, wherein, in the case where the target state is the oil-filled state, determining whether the clutch is in the target state based on the operating condition parameter of the clutch during the current shift includes:

and determining that the clutch is in the oil-over state when the slope of the first hydraulic pump outlet pressure curve meets a second preset condition and the second shift shock is greater than a third preset threshold, wherein the second preset condition comprises at least one of the following: the slope of the first hydraulic pump outlet pressure curve is greater than a third slope value, the slope of the first hydraulic pump outlet pressure curve is less than a fourth slope value, and the third slope value is greater than the fourth slope value.

4. The method of determining according to claim 1, wherein the process of determining the target parameter value based on at least the actual pressure value and the demand pressure value of the clutch includes:

by using

5. The determination method according to any one of claims 1 to 4, characterized in that, in the case where the clutch is in the target state, determining a target oil charge time based on a current oil temperature of a transmission and a rotational speed of an engine includes:

and under the condition that the clutch is in the target state, adopting a table look-up method and determining the target oil filling time based on the current oil temperature of the gearbox and the rotating speed of the engine.

6. The determination method according to any one of claims 1 to 4, characterized in that, after determining a target oil charge time based on a current oil temperature of a transmission and a rotational speed of an engine with the clutch in the target state, the determination method further comprises:

Updating the oil filling time curve by adopting the target oil filling time to obtain an updated oil filling time curve;

and in the next gear shifting process, determining the oil filling time of the clutch based on the updated oil filling time curve, and filling the clutch with oil based on the determined oil filling time of the clutch.

7. The determination method according to claim 6, characterized in that after filling the clutch based on the determined oil filling time of the clutch, the determination method further comprises:

acquiring a third gear shifting impact degree in the next whole gear shifting process;

under the condition that the third gear shifting impact degree is smaller than the first gear shifting impact degree, the updated oil filling time curve is stored;

and under the condition that the third gear shifting impact degree is larger than or equal to the first gear shifting impact degree, storing the oil filling time curve which is not updated.

8. A device for determining oil charge time of a clutch, comprising:

the first acquisition unit is used for acquiring a first gear shifting impact degree of the vehicle in the current gear shifting process, wherein the first gear shifting impact degree is the gear shifting impact degree in the whole gear shifting process at present;

A second obtaining unit, configured to obtain, when the first shift impact degree is greater than a first predetermined threshold value, a working condition parameter of a clutch during the current shift, where the working condition parameter includes a first hydraulic pump outlet pressure curve of the clutch during a pre-charge phase, a target parameter value, and a second shift impact degree, and the second hydraulic pump outlet pressure curve of the clutch during a torque phase, where the target parameter value is determined based at least on an actual pressure value and a demand pressure value of the clutch;

a determining unit, configured to determine, based on the operating condition parameter of the clutch during the current gear shifting process, whether the clutch is in a target state, where, when the clutch is in the target state, a target oil filling time is determined based on a current oil temperature of a gearbox and a rotational speed of an engine, and the target state includes at least one of: an under-filled state and an over-filled state.

9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to perform the method of determining the oil-filling time of the clutch according to any one of claims 1 to 7.

10. A processor for running a program, wherein the program when run performs the method of determining the oil fill time of the clutch of any one of claims 1 to 7.