CN114427580B

CN114427580B - Self-adaptive control method and device for oil filling of synchronizer

Info

Publication number: CN114427580B
Application number: CN202011182541.2A
Authority: CN
Inventors: 张苏文; 熊杰; 李晓波; 邓云飞; 刘学武
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2024-02-23
Anticipated expiration: 2040-10-29
Also published as: CN114427580A

Abstract

The present disclosure provides a synchronizer oil charge self-adaptive control method and device, the method includes determining a current gear, a current oil temperature, a gear fixed oil charge pressure under a current main pressure, and a gear fixed oil charge pressure maintenance time; controlling the synchronizer to charge oil based on the determined gear-in fixed oil charge pressure and the gear-in fixed oil charge pressure maintaining time, and controlling the synchronizer to shift oil pressure based on gear-in variable pressure until the shifting fork moves; and correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintaining time based on the gear change pressure maintaining time and the preset first reference time. The automatic oil filling device automatically corrects the gear fixed oil filling pressure and/or the gear fixed oil filling maintenance time, so that the oil filling is carried out through the corrected gear fixed oil filling pressure and/or the gear fixed oil filling maintenance time, the oil temperature, the main pressure, the piston cavities and the oil circuit volumes of different gears and the change of the whole transmission along with the durability are self-adaptive, and the oil filling effect is improved.

Description

Self-adaptive control method and device for oil filling of synchronizer

Technical Field

The disclosure relates to the field of automatic transmission control, and in particular relates to a synchronizer oil filling self-adaptive control method and device.

Background

In the process of realizing the invention, the inventor finds that at least the following problems exist in the prior art: the influences of piston cavities and oil paths of different gears, the volume of main pressure and the oil temperature cannot be fully considered, the differences of the piston cavities, the oil paths and the self-locking force of different speed variators and the differences of the same speed variators positioning pins along with the abrasion of the pistons along with the durable mileage cannot be covered, and the oil filling effect is poor, such as the conditions of insufficient oil filling or over-filling, excessively high initial speed of a shifting fork or excessively long oil filling time are easy to occur.

Disclosure of Invention

In order to solve the problem of poor oil filling effect in the prior art, the present disclosure provides a self-adaptive control method and device for oil filling of a synchronizer, and improves the oil filling effect.

In one aspect of the disclosure, a method for adaptively controlling oil filling of a synchronizer includes:

responding to the received gear engaging action instruction, and determining the gear engaging fixed oil charging pressure and the gear engaging fixed oil charging pressure maintaining time of the current gear, the current oil temperature and the current main pressure according to the pre-calibrated gear engaging fixed oil charging pressure and gear engaging fixed oil charging pressure maintaining time of different gears, different oil temperatures and different main pressures;

Controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to shift oil pressure based on gear shift pressure until the shifting fork moves, and recording gear shift pressure maintaining time, wherein the gear shift pressure is gradually increased from a preset first initial value;

and correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintaining time based on the gear change pressure maintaining time and a preset first reference time.

Optionally, the fixed oil charge pressure in gear includes a first-stage oil charge pressure in gear and a second-stage oil charge pressure in gear, and the fixed oil charge pressure maintenance time in gear includes a first-stage oil charge pressure maintenance time in gear and a second-stage oil charge pressure maintenance time in gear, where the first-stage oil charge pressure maintenance time in gear is a maintenance time of the first-stage oil charge pressure in gear, the second-stage oil charge pressure maintenance time in gear is a maintenance time of the second-stage oil charge pressure in gear, and the first-stage oil charge pressure in gear is greater than the second-stage oil charge pressure in gear;

controlling synchronizer oil charge based on the determined fixed oil charge in gear pressure and fixed oil charge in gear pressure hold time, comprising: and controlling the synchronizer to fill the oil at the determined first-stage oil-up pressure for the first-stage oil-up pressure maintenance time, and controlling the synchronizer to fill the oil at the determined second-stage oil-up pressure for the second-stage oil-up pressure maintenance time.

Optionally, correcting the pre-calibrated fixed oil charge pressure in gear and/or the fixed oil charge pressure maintenance time in gear includes:

correcting the pre-calibrated gear fixed oil charge pressure and gear fixed oil charge pressure maintenance time through the following formula;

P’ _{1_a} ＝P _{1_a} +K _{1_a} *(T _{move_a} -T _{basis_a} )

T’ _{1_a} ＝T _{1_a} +K _{2_a} *(T _{move_a} -T _{basis_a} )

P’ _{2_a} ＝P _{2_a} +K _{3_a} *(T _{move_a} -T _{basis_a} )

T’ _{2_a} ＝T _{2_a} +K _{4_a} *(T _{move_a} -T _{basis_a} )

wherein P' _{1_a} Indicating corrected first-stage gear oil charge pressure, P _{1_a} Indicating the first-stage gear oil charge pressure before correction, K _{1_a} Indicating the correction coefficient, T, of the first-stage gear oil-filled pressure _{move_a} Indicating the hold time of the pressure of the gear change, T _{basis_a} Representing a first reference time; t'. _{1_a} Indicating the first-stage oil-charge pressure maintaining time before correction, T _{1_a} Representing the corrected firstKeep off oil charge pressure hold time, K _{2_a} Representing a correction coefficient of the first-stage oil-filled pressure maintenance time; p'. _{2_a} Indicating the corrected second-stage oil-filled pressure, P _{2_a} Indicating the second stage of oil charge pressure, K, before correction _{3_a} Representing a second-stage gear oil-filled pressure correction coefficient; t'. _{2_a} Indicating the corrected second-stage oil-filled pressure maintaining time T _{2_a} Indicating the second stage oil charge pressure maintaining time before correction, K _{4_a} And the second-stage gear oil charge pressure maintaining time correction coefficient is represented.

Optionally, the method further comprises:

Responding to the received gear-off action instruction, and determining gear-off fixed oil-charge pressure and gear-off fixed oil-charge pressure maintaining time of the current gear, the current oil temperature and the current main pressure according to pre-calibrated gear-off fixed oil-charge pressure and gear-off fixed oil-charge pressure maintaining time of different gear, different oil temperatures and different main pressures;

controlling a synchronizer to charge oil according to the determined gear-off fixed oil charge pressure and gear-off fixed oil charge pressure maintaining time, controlling the gear-off oil pressure of the synchronizer based on the gear-off variable pressure until the shifting fork moves, and recording the gear-off variable pressure maintaining time, wherein the gear-off variable pressure is gradually increased from a preset second initial value;

and correcting the pre-calibrated gear shift fixed oil filling pressure and gear shift fixed oil filling pressure maintaining time based on the gear shift variable pressure maintaining time and a preset second reference time.

Optionally, the gear-off fixed oil-filling pressure includes a first-stage gear-off oil-filling pressure and a second-stage gear-off oil-filling pressure, the gear-off fixed oil-filling pressure maintaining time includes a first-stage gear-off oil-filling pressure maintaining time and a second gear-off oil-filling pressure maintaining time, the first-stage gear-off oil-filling pressure maintaining time is a first-stage gear-off oil-filling pressure maintaining time, and the second gear-off oil-filling pressure maintaining time is a second-stage gear-off oil-filling pressure maintaining time, wherein the first-stage gear-off oil-filling pressure is greater than the second-stage gear-off oil-filling pressure;

And controlling the oil filling of the synchronizer according to the determined gear-off fixed oil filling pressure and the gear-off fixed oil filling pressure maintaining time, comprising: and controlling the synchronizer to fill the oil at the determined first-stage oil-off filling pressure for the first-stage oil-off filling pressure maintaining time, and controlling the synchronizer to fill the oil at the determined second-stage oil-off filling pressure for the second oil-off filling pressure maintaining time.

Optionally, correcting the pre-calibrated off-hook fixed charge pressure and/or off-hook fixed charge pressure maintenance time includes:

correcting the pre-calibrated gear shift fixed oil charge pressure and the gear shift fixed oil charge pressure maintenance time through the following formula;

P’ _{1_r} ＝P _{1_r} +K _{1_r} *(T _{move_r} -T _{basis_r} )

T’ _{1_r} ＝T _{1_r} +K _{2_r} *(T _{move_r} -T _{basis_r} )

P’ _{2_r} ＝P _{2_r} +K _{3_r} *(T _{move_r} -T _{basis_r} )

T’ _{2_r} ＝T _{2_r} +K _{4_r} *(T _{move_r} -T _{basis_r} )

wherein P' _{1_r} Indicating corrected first-stage oil-pick-up charge pressure, P _{1_r} Representing the first stage of oil-fill pressure, K, before correction _{1_r} Representing the correction coefficient of the oil charge pressure of the first stage, T _{move_r} Shows the off-shift pressure maintaining time T _{basis_r} Representing a second reference time; t'. _{1_r} Indicating the corrected first-stage oil-pick-up charge pressure maintaining time T _{1_r} Indicating the first stage of oil-pick-up and oil-charge pressure maintaining time before correction, K _{2_r} Representing a correction coefficient of the oil charge pressure maintenance time of the first stage; p'. _{2_r} Indicating the corrected second stage oil-filled pressure, P _{2_r} Representing the oil charge pressure, K, of the gear shift in the second stage before correction _{3_r} Representing a second-stage oil-pick-up filling pressure correction coefficient; t'. _{2_r} Indicating when the corrected second-stage oil-out-of-gear charge pressure is maintainedBetween T _{2_r} Indicating the maintenance time K of the oil charge pressure of the gear shift in the second stage before correction _{4_r} And the second stage of the oil-pick-up filling pressure maintaining time correction coefficient is shown.

Optionally, the gear shift pressure is gradually increased by taking the overcoming neutral gear self-locking pressure of the current gear, the current oil temperature and the current main pressure as a preset first initial value and a preset first fixed slope, and the gear shift pressure is gradually increased by taking the overcoming gear self-locking pressure of the current gear, the current oil temperature and the current main pressure as a preset second initial value and a preset second fixed slope.

In another aspect of the disclosure, a synchronizer oil charge adaptive control device includes:

the first determining module is used for responding to the received gear engaging action instruction and determining the current gear, the current oil temperature, the gear engaging fixed oil charging pressure under the current main pressure and the gear engaging fixed oil charging pressure maintaining time according to the pre-calibrated gear engaging fixed oil charging pressure under the different oil temperatures and the different main pressures;

The first control module is used for controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to gear oil pressure based on gear change pressure until the shifting fork moves, and recording gear change pressure maintaining time, wherein the gear change pressure is gradually increased from a preset first initial value;

and the first correction module is used for correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintaining time based on the gear change pressure maintaining time and a preset first reference time.

According to the determined fixed oil filling pressure in gear and the fixed oil filling pressure maintaining time in gear, the synchronizer is controlled to perform fixed oil filling, and the method comprises the following steps: and controlling the synchronizer to fill the oil at the determined first-stage oil-up pressure for the first-stage oil-up pressure maintenance time, and controlling the synchronizer to fill the oil at the determined second-stage oil-up pressure for the second-stage oil-up pressure maintenance time.

Optionally, the apparatus further comprises:

the second determining module is used for responding to the received gear-off action instruction and determining the current gear, the current oil temperature, the gear-off fixed oil charge pressure under the current main pressure and the gear-off fixed oil charge pressure maintaining time according to the pre-calibrated gear-off fixed oil charge pressure under the different oil temperatures and the different main pressures;

the second control module is used for controlling the synchronizer to charge oil according to the determined gear-off fixed oil charge pressure and gear-off fixed oil charge pressure maintaining time, controlling the gear-off oil pressure of the synchronizer based on the gear-off variable pressure until the shifting fork moves, and recording the gear-off variable pressure maintaining time, wherein the gear-off variable pressure is gradually increased from a preset second initial value;

And the second correction module is used for correcting the pre-calibrated gear shift fixed oil filling pressure and gear shift fixed oil filling pressure maintaining time based on the gear shift variable pressure maintaining time and a preset second reference time.

Optionally, the gear-off fixed oil-filling pressure includes a first-stage gear-off oil-filling pressure and a second-stage gear-off oil-filling pressure, the gear-off fixed oil-filling pressure maintaining time includes a first-stage gear-off oil-filling pressure maintaining time and a second gear-off oil-filling pressure maintaining time, wherein the first-stage gear-off oil-filling pressure maintaining time is a first-stage gear-off oil-filling pressure maintaining time, the second gear-off oil-filling pressure maintaining time is a second-stage gear-off oil-filling pressure maintaining time, and the first-stage gear-off oil-filling pressure is greater than the second-stage gear-off oil-filling pressure;

the step of controlling the synchronizer to perform fixed oil filling according to the determined gear-off fixed oil filling pressure and the gear-off fixed oil filling pressure maintaining time comprises the following steps: and controlling the synchronizer to fill the oil at the determined first-stage oil-off filling pressure for the first-stage oil-off filling pressure maintaining time, and controlling the synchronizer to fill the oil at the determined second-stage oil-off filling pressure for the second oil-off filling pressure maintaining time.

One of the above technical solutions has the following advantages or beneficial effects:

and selecting a gear fixed oil filling pressure and a gear fixed oil filling pressure maintaining time based on the current gear, the current oil temperature and the current main pressure, controlling the synchronizer to fill oil according to the selected gear fixed oil filling pressure and gear fixed oil filling pressure maintaining time, controlling the synchronizer to shift the oil pressure until the shifting fork moves based on the gear change pressure after the oil filling is finished, recording the gear change pressure maintaining time (namely the gear change pressure maintaining time), correcting the gear fixed oil filling pressure and/or the gear fixed oil filling pressure maintaining time by comparing the gear change pressure maintaining time with the reference time, and enabling the gear change pressure maintaining time to be used for filling oil according to the corrected gear fixed oil filling pressure and/or the gear fixed oil filling pressure maintaining time when the gear change action command is responded again, enabling the gear change pressure maintaining time to be closer to the first reference time, ensuring quick oil filling of the shifting fork, overcoming self-locking pressure and static friction displacement at a proper speed, and further ensuring the oil filling effect.

The initial values of the oil filling pressure of the fixed gear and the maintaining time of the oil filling pressure of the fixed gear are calibration values, and different gears, oil temperatures and main pressures are distinguished, so that the oil filling effect in the technical scheme is not influenced by the volumes of piston cavities and oil paths in different gears, the main pressures and the oil temperatures.

Gear-engaged fixed oil-filling pressure oil-filling is divided into two stages; the first stage is used for filling oil pressure with a larger first stage, and the first stage is used for filling oil pressure maintenance time to ensure that a piston cavity and an oil way are quickly flushed with most of oil; the second stage is fixed and uses the smaller second stage oil-engaging and oil-charging pressure to charge the oil-engaging and oil-charging pressure maintenance time in the second stage, so that the piston cavity and the oil way are ensured to be smoothly filled in the oil way, and the overcharge is avoided.

According to the difference value between the gear shift pressure maintaining time and the first reference time, the first-stage gear oil filling pressure maintaining time, the second-stage gear oil filling pressure and the second-stage gear oil filling pressure maintaining time are automatically corrected, so that when the gear shift action command is received and responded again, the corrected first-stage gear oil filling pressure, the first-stage gear oil filling pressure maintaining time, the second-stage gear oil filling pressure and the second-stage gear oil filling pressure maintaining time can be adopted for filling, and the oil filling effect is improved.

And after the oil filling is finished, the synchronizer is controlled to pick up the oil pressure until the shifting fork moves based on the pick-up pressure change, the pick-up pressure change maintaining time (namely the maintaining time of the pick-up pressure change) is recorded, the pick-up pressure change maintaining time and the second reference time are compared, and the pick-up fixed oil filling pressure and/or the pick-up fixed oil filling pressure maintaining time are corrected, so that the oil filling is carried out according to the corrected pick-up fixed oil filling pressure and/or the pick-up fixed oil filling pressure maintaining time when the received pick-up action command is responded again, the pick-up pressure change maintaining time is closer to the first reference time, the quick oil filling of the shifting fork is ensured, the self-locking pressure and the static friction displacement are overcome at a proper speed, and the oil filling effect is ensured.

The initial values of the oil filling pressure of the gear shift fixing and the oil filling pressure maintaining time of the gear shift fixing are standard values, and different gears, oil temperatures and main pressures are distinguished, so that the oil filling effect in the technical scheme is not influenced by the volumes of piston cavities and oil paths in different gears, the main pressures and the oil temperatures.

The gear shifting, fixed oil filling, pressure oil filling and oil filling are divided into two stages; the first stage is to take off the oil-filled pressure with the first stage of bigger first stage and fill the oil-filled pressure and keep the time of first stage of taking off, ensure that piston cavity and oil circuit wash most of the oil fast; the second stage is fixed, and the oil filling pressure is filled by the smaller second stage oil filling pressure, so that the maintenance time of the second oil filling pressure is ensured, the piston cavity and the oil way are smoothly filled in the oil way, and the overcharge is avoided.

According to the difference value between the first-stage gear-shifting oil-filling pressure, the first-stage gear-shifting oil-filling pressure maintaining time, the second-stage gear-shifting oil-filling pressure and the second gear-shifting oil-filling pressure maintaining time based on the gear-shifting pressure maintaining time and the second reference time, the corrected first-stage gear-shifting oil-filling pressure, the first-stage gear-shifting oil-filling pressure maintaining time, the second-stage gear-shifting oil-filling pressure and the second-stage gear-shifting oil-filling pressure maintaining time can be adopted for oil filling when the gear-shifting action instructions are received and responded again, and the oil filling effect is improved.

The gear-shifting pressure is gradually increased by taking the current gear, the current oil temperature and the current main pressure as a preset second initial value and a preset second fixed slope, so that the gear-shifting pressure is ensured to be stably increased, the shifting fork can overcome the self-locking pressure and static friction at a proper speed to displace, and the oil filling effect is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a flow chart of a synchronizer oil charge adaptive control method in one embodiment of the present disclosure;

FIG. 2 is another flow chart of a synchronizer oil charge adaptive control method in one embodiment of the present disclosure;

FIG. 3 is a block diagram of a synchronizer oil filled adaptive control device in one embodiment of the present disclosure;

FIG. 4 is another block diagram of a synchronizer oil filled adaptive control device in one embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the timing of each pressure maintenance and corresponding shift fork position during synchronizer charge adaptive control in one embodiment of the present disclosure.

Detailed Description

The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.

In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1:

referring to fig. 1, a method for adaptively controlling oil filling of a synchronizer includes:

step S1: responding to the received gear engaging action instruction, and determining the gear engaging fixed oil charging pressure and the gear engaging fixed oil charging pressure maintaining time of the current gear, the current oil temperature and the current main pressure according to the pre-calibrated gear engaging fixed oil charging pressure and gear engaging fixed oil charging pressure maintaining time of different gears, different oil temperatures and different main pressures;

step S2: controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to shift oil pressure based on gear shift pressure until the shifting fork moves, and recording gear shift pressure maintaining time, wherein the gear shift pressure is gradually increased from a preset first initial value;

Step S3: and correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintaining time based on the gear change pressure maintaining time and a preset first reference time.

According to the technical scheme, the gear fixed oil filling pressure and the gear fixed oil filling pressure maintaining time are selected based on the current gear, the current oil temperature and the current main pressure, the synchronizer is controlled to fill oil according to the selected gear fixed oil filling pressure and the gear fixed oil filling pressure maintaining time, after the oil filling is finished, the synchronizer is controlled to shift the oil pressure until the shifting fork moves based on the gear change pressure, the gear change pressure maintaining time (namely, the gear change pressure maintaining time) is recorded, the gear fixed oil filling pressure and/or the gear fixed oil filling pressure maintaining time are corrected by comparing the gear change pressure maintaining time with the reference time, so that the oil filling is performed according to the corrected gear fixed oil filling pressure and/or the gear fixed oil filling pressure maintaining time when the received gear change action command is responded again, the gear change pressure maintaining time is closer to the first reference time, the shifting fork is ensured to be rapidly filled with oil, the self-locking pressure and the static friction are overcome, and the oil filling effect is ensured.

In the technical scheme, the initial values of the gear fixed oil filling pressure and the gear fixed oil filling pressure maintaining time are the calibration values, and different gears, oil temperatures and main pressures are distinguished, so that the oil filling effect in the technical scheme is not influenced by the volumes of piston cavities and oil paths in different gears, the main pressures and the oil temperatures. The gear and the clutch are controlled by hydraulic execution, and the main pressure is the pressure of a main oil way.

In the technical scheme, the speed, the first initial value and the first reference time of gradually increasing the gear shifting pressure are set based on gear, oil temperature, main pressure, gear shifting working conditions and the like, so that shifting forks can overcome self-locking pressure and static friction to displace at proper speeds under different working conditions.

In the above technical solution, the pre-calibrated gear, oil temperature and main pressure of different gear, gear fixed oil charge pressure and gear fixed oil charge pressure maintenance time may be a corresponding relation table of gear, oil temperature and main pressure, gear fixed oil charge pressure and gear fixed oil charge pressure maintenance time.

In one embodiment, the fixed gear oil charge pressure comprises a first stage gear oil charge pressure and a second stage gear oil charge pressure, the fixed gear oil charge pressure maintenance time comprises a first stage gear oil charge pressure maintenance time and a second stage gear oil charge pressure maintenance time, wherein the first stage gear oil charge pressure maintenance time is the first stage gear oil charge pressure maintenance time, the second stage gear oil charge pressure maintenance time is the second stage gear oil charge pressure maintenance time, and the first stage gear oil charge pressure is greater than the second stage gear oil charge pressure;

In the technical scheme, the gear-engaged fixed oil-filling pressure oil filling is divided into two stages; the first stage is used for filling oil pressure with a larger first stage, and the first stage is used for filling oil pressure maintenance time to ensure that a piston cavity and an oil way are quickly flushed with most of oil; the second stage is fixed and uses the smaller second stage oil-engaging and oil-charging pressure to charge the oil-engaging and oil-charging pressure maintenance time in the second stage, so that the piston cavity and the oil way are ensured to be smoothly filled in the oil way, and the overcharge is avoided.

In one embodiment, the pre-calibrated fixed-in-range charge pressure and fixed-in-range charge pressure hold time are modified by the following formulas:

P’ _{1_a} ＝P _{1_a} +K _{1_a} *(T _{move_a} -T _{basis_a} )

T’ _{1_a} ＝T _{1_a} +K _{2_a} *(T _{move_a} -T _{basis_a} )

P’ _{2_a} ＝P _{2_a} +K _{3_a} *(T _{move_a} -T _{basis_a} )

T’ _{2_a} ＝T _{2_a} +K _{4_a} *(T _{move_a} -T _{basis_a} )

wherein P' _{1_a} Indicating corrected first-stage gear oil charge pressure, P _{1_a} Indicating the first-stage gear oil charge pressure before correction, K _{1_a} Indicating the correction coefficient, T, of the first-stage gear oil-filled pressure _{move_a} Indicating the hold time of the pressure of the gear change, T _{basis_a} Representing a first reference time; t'. _{1_a} Representing the first stage after correctionHold time of oil charge pressure in gear, T _{1_a} Indicating the first gear charge pressure maintenance time, K, before correction _{2_a} Representing a correction coefficient of the first-stage oil-filled pressure maintenance time; p'. _{2_a} Indicating the corrected second-stage oil-filled pressure, P _{2_a} Indicating the second stage of oil charge pressure, K, before correction _{3_a} Representing a second-stage gear oil-filled pressure correction coefficient; t'. _{2_a} Indicating the corrected second-stage oil-filled pressure maintaining time T _{2_a} Indicating the second stage oil charge pressure maintaining time before correction, K _{4_a} And the second-stage gear oil charge pressure maintaining time correction coefficient is represented.

K as described above _{1_a} 、K _{2_a} 、K _{3_a} 、K _{4_a} And T _{basis_a} The preset value can be set according to actual conditions.

In the above technical solution, according to the difference value between the first-stage gear oil-filling pressure, the first-stage gear oil-filling pressure maintaining time, the second-stage gear oil-filling pressure, and the second-stage gear oil-filling pressure maintaining time based on the gear-shifting pressure maintaining time and the first reference time, the corrected first-stage gear oil-filling pressure, first-stage gear oil-filling pressure maintaining time, second-stage gear oil-filling pressure, and second-stage gear oil-filling pressure maintaining time may be adopted to fill oil when the gear-shifting action command is received and responded again, so as to improve the oil-filling effect.

In one embodiment, the shift pressure is gradually increased with a preset first initial value and a preset first fixed slope with the current gear, the current oil temperature, and the current main pressure overcoming the neutral self-locking pressure.

In the technical scheme, the gear shift pressure is gradually increased by taking the current gear, the current oil temperature and the current main pressure neutral gear overcoming self-locking pressure as a preset first initial value and a preset first fixed slope, so that the gear shift pressure is ensured to be stably increased, the shifting fork can overcome the self-locking pressure and the static friction at a proper speed to displace, and the oil filling effect is improved.

In one embodiment, referring to fig. 2, the method further comprises:

step S01: responding to the received gear-off action instruction, and determining gear-off fixed oil-charge pressure and gear-off fixed oil-charge pressure maintaining time of the current gear, the current oil temperature and the current main pressure according to pre-calibrated gear-off fixed oil-charge pressure and gear-off fixed oil-charge pressure maintaining time of different gear, different oil temperatures and different main pressures;

step S02: controlling a synchronizer to charge oil according to the determined gear-off fixed oil charge pressure and gear-off fixed oil charge pressure maintaining time, controlling the gear-off oil pressure of the synchronizer based on the gear-off variable pressure until the shifting fork moves, and recording the gear-off variable pressure maintaining time, wherein the gear-off variable pressure is gradually increased from a preset second initial value;

Step S03: and correcting the pre-calibrated gear shift fixed oil filling pressure and gear shift fixed oil filling pressure maintaining time based on the gear shift variable pressure maintaining time and a preset second reference time.

According to the technical method, the gear-off fixed oil filling pressure and the gear-off fixed oil filling pressure maintaining time are selected based on the current gear, the current oil temperature and the current main pressure, the synchronizer oil filling is controlled according to the selected gear-off fixed oil filling pressure and the gear-off fixed oil filling pressure maintaining time, after the oil filling is finished, the gear-off oil pressure of the synchronizer is controlled based on the gear-off variable pressure until the shifting fork moves, the gear-off variable pressure maintaining time (namely the gear-off variable pressure maintaining time) is recorded, the gear-off fixed oil filling pressure and/or the gear-off fixed oil filling pressure maintaining time are corrected by comparing the gear-off variable pressure maintaining time with the second reference time, so that the oil filling is carried out according to the corrected gear-off fixed oil filling pressure and/or the gear-off fixed oil filling pressure maintaining time when the received gear-off action command is responded again, the gear-off variable pressure maintaining time is closer to the first reference time, the shifting fork is ensured to be filled with oil rapidly, the self-locking pressure and the static friction displacement is overcome at a proper speed, and the oil filling effect is ensured.

In the technical scheme, the initial values of the oil filling pressure of the gear shift fixing and the maintaining time of the oil filling pressure of the gear shift fixing are standard values, and different gears, oil temperatures and main pressures are distinguished, so that the oil filling effect in the technical scheme is not influenced by the volumes of piston cavities and oil paths in different gears, the main pressures and the oil temperatures.

In the technical method, the speed at which the gear-off pressure is gradually increased, the first initial value and the second reference time can be set according to actual conditions, so that the shifting fork can overcome the self-locking pressure and the static friction to displace at a proper speed in the process of gradually increasing the gear-off fixed oil-filled pressure.

In the above technical method, the off-hook fixed oil charge pressure maintaining time is the off-hook fixed oil charge pressure maintaining time. The pre-calibrated gear, oil temperature and oil pressure and the maintaining time of the gear fixed oil filling pressure under different main pressures are the pre-calibrated gear, oil temperature and oil pressure under different main pressures and the maintaining time of the gear fixed oil filling pressure.

In one embodiment, the fixed oil-filling pressure includes a first-stage oil-filling pressure and a second-stage oil-filling pressure, the fixed oil-filling pressure maintenance time includes a first-stage oil-filling pressure maintenance time and a second-stage oil-filling pressure maintenance time, the first-stage oil-filling pressure maintenance time is a first-stage oil-filling pressure maintenance time, the second-stage oil-filling pressure maintenance time is a second-stage oil-filling pressure maintenance time, and the first-stage oil-filling pressure is greater than the second-stage oil-filling pressure;

Controlling the synchronizer to charge oil according to the determined gear-off fixed oil charge pressure and the gear-off fixed oil charge pressure maintaining time, comprising: and controlling the synchronizer to fill the oil at the determined first-stage oil-off filling pressure for the first-stage oil-off filling pressure maintenance time, and controlling the synchronizer to fill the oil at the determined second-stage oil-off filling pressure for the second-stage oil-off filling pressure maintenance time.

In the technical scheme, the gear shifting, fixed oil filling pressure and oil filling are divided into two stages; the first stage is to take off the oil-filled pressure with the first stage of bigger first stage and fill the oil-filled pressure and keep the time of first stage of taking off, ensure that piston cavity and oil circuit wash most of the oil fast; the second stage is fixed, and the oil-filling pressure is supplied by the smaller second stage oil-filling pressure, and the maintenance time of the second stage oil-filling pressure is ensured, so that the piston cavity and the oil way are smoothly filled in the oil way, and the overcharge is avoided.

In one embodiment, the pre-calibrated off-shift fixed charge pressure and off-shift fixed charge pressure hold time are modified using the following formulas;

P’ _{1_r} ＝P _{1_r} +K _{1_r} *(T _{move_r} -T _{basis_r} )

T’ _{1_r} ＝T _{1_r} +K _{2_r} *(T _{move_r} -T _{basis_r} )

P’ _{2_r} ＝P _{2_r} +K _{3_r} *(T _{move_r} -T _{basis_r} )

T’ _{2_r} ＝T _{2_r} +K _{4_r} *(T _{move_r} -T _{basis_r} )

wherein P' _{1_r} Indicating corrected first-stage oil-pick-up charge pressure, P _{1_r} Representing the first stage of oil-fill pressure, K, before correction _{1_r} Representing the correction coefficient of the oil charge pressure of the first stage, T _{move_r} Shows the off-shift pressure maintaining time T _{basis_r} Representing a second reference time; t'. _{1_r} Indicating the corrected first-stage oil-pick-up charge pressure maintaining time T _{1_r} Indicating the first stage of oil-pick-up and oil-charge pressure maintaining time before correction, K _{2_r} Representing a correction coefficient of the oil charge pressure maintenance time of the first stage; p'. _{2_r} Indicating the corrected second stage oil-filled pressure, P _{2_r} Representing the oil charge pressure, K, of the gear shift in the second stage before correction _{3_r} Representing a second-stage oil-pick-up filling pressure correction coefficient; t'. _{2_r} Indicating the corrected second-stage oil-pick-up and oil-charge pressure maintaining time T _{2_r} Indicating the maintenance time K of the oil charge pressure of the gear shift in the second stage before correction _{4_r} And the second stage of the oil-pick-up filling pressure maintaining time correction coefficient is shown.

According to the technical scheme, the first-stage gear-off oil-filling pressure maintaining time, the second-stage gear-off oil-filling pressure and the second-stage gear-off oil-filling pressure maintaining time are automatically corrected based on the difference value between the gear-off pressure maintaining time and the second reference time, so that oil filling can be carried out by adopting the corrected first-stage gear-off oil-filling pressure, the first-stage gear-off oil-filling pressure maintaining time, the second-stage gear-off oil-filling pressure and the second-stage gear-off oil-filling pressure maintaining time when the gear-off action command is received and responded again, and the oil filling effect is improved.

K as described above _{1_r} 、K _{2_r} 、K _{3_r} 、K _{4_r} And T _{basis_r} The preset value can be set according to actual conditions.

In one embodiment, the off-shift pressure is gradually increased with the current gear, the current oil temperature, and the current main pressure overcoming the on-shift self-locking pressure as a preset second initial value and with a preset second fixed slope.

In the technical scheme, the gear-off variable pressure is gradually increased by taking the current gear, the current oil temperature and the current main pressure as a preset second initial value and a preset second fixed slope, so that the gear-off variable pressure is ensured to be stably increased, the shifting fork can overcome the self-locking pressure and the static friction at a proper speed to displace, and the oil filling effect is improved.

Example 2:

referring to fig. 3, an adaptive control device for oil filling of a synchronizer includes:

the first determining module 1 is configured to determine a current gear, a current oil temperature, and a gear fixed oil charge pressure maintenance time under a current main pressure according to a gear fixed oil charge pressure and a gear fixed oil charge pressure maintenance time under a different main pressure calibrated in advance in response to a received gear action instruction;

the first control module 2 is used for controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to gear oil pressure based on gear change pressure until the shifting fork moves, and recording gear change pressure maintaining time, wherein the gear change pressure is gradually increased from a preset first initial value;

And the first correction module 3 is configured to correct the pre-calibrated fixed oil filling pressure in gear and/or fixed oil filling pressure in gear maintaining time based on the gear shift pressure maintaining time and a preset first reference time.

In the technical scheme, the initial values of the gear fixed oil filling pressure and the gear fixed oil filling pressure maintaining time are the calibration values, and different gears, oil temperatures and main pressures are distinguished, so that the oil filling effect in the technical scheme is not influenced by the volumes of piston cavities and oil paths in different gears, the main pressures and the oil temperatures.

In the technical scheme, the speed, the first initial value and the first reference time of gradually increasing the gear shifting pressure are set based on gear, oil temperature, main pressure, gear shifting working conditions and the like, so that the shifting fork can overcome self-locking pressure and static friction to displace at proper speed under different working conditions.

In one embodiment, the fixed gear oil charge pressure includes a first stage gear oil charge pressure and a second stage gear oil charge pressure, the fixed gear oil charge pressure maintenance time includes a first stage gear oil charge pressure maintenance time and a second stage gear oil charge pressure maintenance time, the first stage gear oil charge pressure maintenance time is a first stage gear oil charge pressure maintenance time, the second stage gear oil charge pressure maintenance time is a second stage gear oil charge pressure maintenance time, and the first stage gear oil charge pressure is greater than the second stage gear oil charge pressure;

According to the determined fixed oil charge pressure in gear and the fixed oil charge pressure maintenance time in gear, the synchronizer is controlled to carry out fixed oil charge, and the method comprises the following steps: and controlling the synchronizer to fill the oil at the determined first-stage oil-up pressure for the first-stage oil-up pressure maintenance time, and controlling the synchronizer to fill the oil at the determined second-stage oil-up pressure for the second-stage oil-up pressure maintenance time.

In one embodiment, the first correction module corrects the pre-calibrated fixed in-gear charge pressure and fixed in-gear charge pressure hold time by:

P’ _{1_a} ＝P _{1_a} +K _{1_a} *(T _{move_a} -T _{basis_a} )

T’ _{1_a} ＝T _{1_a} +K _{2_a} *(T _{move_a} -T _{basis_a} )

P’ _{2_a} ＝P _{2_a} +K _{3_a} *(T _{move_a} -T _{basis_a} )

T’ _{2_a} ＝T _{2_a} +K _{4_a} *(T _{move_a} -T _{basis_a} )

wherein P' _{1_a} Indicating corrected first-stage gear oil charge pressure, P _{1_a} Indicating the first-stage gear oil charge pressure before correction, K _{1_a} Representing the first stageCorrection coefficient of oil filling pressure of gear, T _{move_a} Indicating the hold time of the pressure of the gear change, T _{basis_a} Representing a first reference time; t'. _{1_a} Indicating the first-stage oil-charge pressure maintaining time before correction, T _{1_a} Indicating the corrected first-stage oil-charge pressure maintaining time K _{2_a} Representing a correction coefficient of the first-stage oil-filled pressure maintenance time; p'. _{2_a} Indicating the corrected second-stage oil-filled pressure, P _{2_a} Indicating the second stage of oil charge pressure, K, before correction _{3_a} Representing a second-stage gear oil-filled pressure correction coefficient; t'. _{2_a} Indicating the corrected second-stage oil-filled pressure maintaining time T _{2_a} Indicating the second stage oil charge pressure maintaining time before correction, K _{4_a} And the second-stage gear oil charge pressure maintaining time correction coefficient is represented.

In the technical scheme, the gear shift pressure is gradually increased by taking the current gear, the current oil temperature and the current main pressure and the neutral gear overcoming self-locking pressure as a preset first initial value and a preset first fixed slope, so that the gear shift pressure is ensured to be stably increased, the shifting fork can overcome the self-locking pressure and the static friction at a proper speed to displace, and the oil filling effect is improved.

In one embodiment, referring to fig. 4, the apparatus further comprises:

the second determining module 4 is configured to determine, in response to the received gear-off action instruction, a current gear, a current oil temperature, and a gear-off fixed oil charge pressure maintenance time under the current main pressure according to pre-calibrated gear-off fixed oil charge pressures and gear-off fixed oil charge pressure maintenance times under different gear positions, different oil temperatures, and different main pressures;

the second control module 5 is used for controlling the synchronizer to charge oil according to the determined gear-off fixed oil charge pressure and gear-off fixed oil charge pressure maintaining time, controlling the gear-off oil pressure of the synchronizer based on the gear-off variable pressure until the shifting fork moves, and recording the gear-off variable pressure maintaining time, wherein the gear-off variable pressure is gradually increased from a preset second initial value;

And the second correction module 6 is used for correcting the pre-calibrated gear shift fixed oil filling pressure and gear shift fixed oil filling pressure maintaining time based on the gear shift variable pressure maintaining time and a preset second reference time.

In the technical method, the speed at which the gear-off variable pressure is gradually increased, the second initial value and the second reference time can be set according to actual conditions, so that the shifting fork can overcome the self-locking pressure and the static friction to displace at a proper speed in the process of gradually increasing the gear-off fixed oil-filled pressure.

In one embodiment, the fixed oil-charge-off pressure includes a first-stage oil-charge-off pressure and a second-stage oil-charge-off pressure, the fixed oil-charge-off pressure maintenance time includes a first-stage oil-charge-off pressure maintenance time and a second-stage oil-charge-off pressure maintenance time, the first-stage oil-charge-off pressure maintenance time is a first-stage oil-charge-off pressure maintenance time, the second-stage oil-charge-off pressure maintenance time is a second-stage oil-charge-off pressure maintenance time, and the first-stage oil-charge-off pressure maintenance time is greater than the second-stage oil-charge-off pressure maintenance time;

According to the determined gear-off fixed oil charge pressure and gear-off fixed oil charge pressure maintaining time, controlling the synchronizer to carry out fixed oil charge, comprising: and controlling the synchronizer to fill the oil at the determined first-stage oil-off filling pressure for the first-stage oil-off filling pressure maintenance time, and controlling the synchronizer to fill the oil at the determined second-stage oil-off filling pressure for the second-stage oil-off filling pressure maintenance time.

In one embodiment, the second correction module corrects the pre-calibrated off-shift fixed charge pressure and off-shift fixed charge pressure hold time using the following formula;

P' _{1_r} ＝P _{1_r} +K _{1_r} *(T _{move_r} -T _{basis_r} )

T' _{1_r} ＝T _{1_r} +K _{2_r} *(T _{move_r} -T _{basis_r} )

P' _{2_r} ＝P _{2_r} +K _{3_r} *(T _{move_r} -T _{basis_r} )

T' _{2_r} ＝T _{2_r} +K _{4_r} *(T _{move_r} -T _{basis_r} )

Example 3:

first, the parameters in the present embodiment will be described:

P ₁ : the first-stage oil filling pressure is divided into a first-stage gear oil filling pressure P _{1_apply} First stage oil-filling pressure P _{1_release} ；

P _{1_apply} : the first stage is to shift oil charge pressure, wherein the initial value of the pressure is a calibration value, and different gears, oil temperatures and main pressures are distinguished;

P _{1_release} : the first stage is to pick up oil charge pressure, the initial value of the pressure is a calibration value, and different gears, oil temperatures and main pressures are distinguished;

P' ₁ : the oil charging pressure of the first stage after correction based on shifting fork moving time;

k1: the first stage oil charge pressure correction coefficient;

T ₁ : the first-stage oil filling pressure maintaining time is divided into a first-stage gear oil filling pressure maintaining time T _{1_apply} First stage oil-out and oil-in pressure maintaining time T _{1_release} ；

T _{1_apply} : the first stage is to keep the oil charge pressure for a long time, and distinguish different gears, oil temperatures and main pressures;

T _{1_release} : the first stage is to pick up the oil charge pressure maintenance time, distinguish different gears, oil temperature and main pressure;

T' ₁ : based on shift fork movement timeThe corrected first-stage oil filling pressure maintaining time;

k2: the first stage oil charge pressure maintenance time correction coefficient;

P ₂ : the second stage oil filling pressure is divided into a second stage gear oil filling pressure P _{2_apply} Oil filling pressure P of second stage gear shift _{2_release} ；

P _{2_apply} : the second stage of gear shifting oil filling pressure, the initial value of the pressure is a calibration value, and different gears, oil temperatures and main pressures are distinguished

P _{2_release} : the second stage is to pick up oil charge pressure with initial value of standard value to distinguish different gear, oil temperature and main pressure

P' ₂ : the oil charging pressure of the second stage after correction based on the shifting fork moving time;

and k3: the second stage oil filling pressure correction coefficient;

T ₂ : the second stage oil filling pressure maintaining time is divided into a second stage gear oil filling pressure maintaining time T _{2_apply} Second stage oil-filling pressure maintaining time T _{2_release} ；

T _{2_apply} : the second stage is to keep the oil charge pressure for a long time to distinguish different gears, oil temperatures and main pressures;

T _{2_release} : the second stage is to pick up the oil charge pressure maintenance time, distinguish different gears, oil temperature and main pressure;

T' ₂ : the second-stage oil charging pressure maintaining time after correction based on shifting fork moving time;

k4: the second stage oil charge pressure maintains the time correction coefficient;

T _move : gradually pressurizing to the actual moving time of the shifting fork after the first two-stage oil filling is finished;

T _basis : gradually pressurizing to the reference time of shifting fork movement after the first two-stage oil filling is finished;

P _{neutral gear} : overcoming neutral gear self-locking pressure and distinguishing different gears, oil temperatures and main pressures;

P _{in the gear} : overcome in-gear self-lockingPressure, distinguishing different gears, oil temperature and main pressure;

P _grad : the slope of the pressure change distinguishes the oil temperature and the main pressure;

referring to fig. 5, fig. 5 is a schematic diagram of time for maintaining each pressure and corresponding shift fork position in the control process of the synchronizer oil charge adaptive control method of the present disclosure; the method of the present disclosure comprises the steps of:

step A: at first, calibrating different gears, different oil temperatures, different main pressure, and gear shift fixed oil filling pressure and time, the synchronizer fixed oil filling is divided into 2 stages, and the first stage oil filling pressure P ₁ First stage of oil filling pressure maintenance time T ₁ On the basis of considering hydraulic response, the piston cavity and the oil way are ensured to be quickly flushed with most of oil; second stage oil filling pressure P ₂ Oil-filling pressure maintaining time T in oil-filling second stage ₂ Ensure that piston chamber and oil circuit gently are full of the oil circuit, avoid the overcharge.

I.e. calibrating the first-stage oil charge pressure P of different gears, different oil temperatures and different main pressures ₁ The method comprises the steps of carrying out a first treatment on the surface of the Calibrating the first stage oil filling pressure maintaining time T of different gears, different oil temperatures and different main pressures ₁ The method comprises the steps of carrying out a first treatment on the surface of the Calibrating the second-stage oil filling pressure P with different gears, different oil temperatures and different main pressures ₂ The method comprises the steps of carrying out a first treatment on the surface of the Calibrating the second stage oil filling pressure maintaining time T of different gears, different oil temperatures and different main pressures ₂

And (B) step (B): calibrating neutral gear self-locking pressure P for different gears, different oil temperatures and different main pressures _{Neutral gear} The method comprises the steps of carrying out a first treatment on the surface of the Calibrating self-locking pressure P in gear under different gears, different oil temperatures and different main pressures _{In the gear} ；

Step C: the synchronizer executing mechanism receives a gear-off and gear-on action instruction, wherein the gear-off and gear-on action instruction comprises an action gear and a target action, if the target action is a gear-on action, the step D is entered, and if the target action is a gear-off action, the step G is entered;

step D: selecting a first stage of gear oil charge pressure P based on a current gear, oil temperature and main pressure _{1_apply} First stage oil charge pressure maintenance time T _{1_apply} Setting gear shifting pressure at first-stage gear shifting oil filling pressure P _{1_apply} Maintain the first stage of gear oil charge pressure maintaining time T _{1_apply} Ensure that the piston cavity and the oil way are quickly flushed with most of oil, and if the time exceeds the first-stage gear-engaging oil-charging pressure maintaining time T _{1_apply} E, entering a step E, otherwise maintaining the step D;

step E: selecting second-stage gear oil charge pressure P based on current gear, oil temperature and main pressure _{2_apply} Second stage oil-filled pressure maintaining time T _{2_apply} Setting gear shifting pressure in second stage _{2_apply} Maintain the second stage of gear oil charge pressure maintaining time T _{2_apply} Ensure that the piston cavity and the oil way are smoothly filled in the oil way, if the time exceeds T ₂ Step F is entered, otherwise, the step E is maintained;

step F: neutral gear self-locking pressure P is overcome based on current gear, oil temperature and main pressure _{Neutral gear} In overcoming neutral gear self-locking pressure P _{Neutral gear} Based on the slope P _grad Increasing the gear engaging pressure until the shifting fork moves, and recording the time T of the step F at the moment _move (i.e. the actual time of gradually pressing to shift fork movement after the end of the first two-stage oil charge) and the pressure P _move (namely, gradually pressurizing to the pressure when the shifting fork moves after the oil filling in the first two stages is finished), if the shifting fork moves, entering the step J, otherwise, maintaining the step F;

step G: selecting first-stage gear-off oil charge pressure P based on current gear, oil temperature and main pressure _{1_release} First stage oil-out and oil-in pressure maintaining time T _{1_release} Setting gear shifting pressure at first stage of gear shifting oil charge pressure P _{1_release} Maintaining the first-stage oil-out and filling pressure for a period T _{1_release} Ensure that the piston cavity and the oil way are quickly flushed with most of oil, if the time exceeds the first stage oil-out and oil-in pressure maintaining time T _{1_release} Step H is entered, otherwise, step G is maintained;

step H: selecting second-stage gear-picking oil-filling pressure P based on current gear, oil temperature and main pressure _{2_release} Second stage oil-filled pressure maintaining time T _{2_release} Setting gear shifting pressureOil charge pressure P is plucked to power second stage _{2_release} Maintain the second stage of oil-out and oil-in pressure maintaining time T _{2_release} Ensure that the piston cavity and the oil way are smoothly filled in the oil way, and if the time exceeds the maintaining time T of the second-stage oil-pick-up and oil-charge pressure _{2_release} Step I is entered, otherwise step H is maintained;

step I: on the basis of the current gear, the oil temperature and the main pressure, the automatic pressure P of the gear is overcome _{In the gear} Overcoming the gear self-locking pressure P _{In the gear} Based on the slope P _grad Increasing the gear-shifting pressure until the shifting fork moves, and recording the time T of the step J at the moment _move (i.e. the actual time of gradually pressing to shift fork movement after the end of the first two-stage oil charge) and the pressure P _move (namely, gradually pressurizing to the pressure when the shifting fork moves after the oil filling in the first two stages is finished), if the shifting fork moves, entering the step J, otherwise, maintaining the step I;

step J: based on the actual time T from the gradual pressurization to the shifting fork movement after the end of the first two-stage oil filling _move And the reference time T for gradually pressurizing to shift fork movement after the first two-stage oil filling is finished _basis Correcting and fixing the oil filling pressure and time, wherein,

P' ₁ ＝P ₁ +k1*(T _move -T _basis )

T' ₁ ＝T ₁ +k2*(T _move -T _basis )

P' ₂ ＝P ₂ +k3*(T _move -T _basis )

T' ₂ ＝T ₂ +k4*(T _move -T _basis )

step K: and storing the corrected fixed oil filling pressure and time (namely the first two-stage oil filling pressure and the maintaining time) into the TCU, and receiving the gear shifting action instruction by the synchronizer executing mechanism and filling oil according to the corrected fixed oil filling pressure and the time.

According to the invention, oil charge is distinguished by taking off and taking on, fixed oil charge pressure and time parameters under different gears, different main pressures and different oil temperatures are calibrated through a rack and written into a TCU controller, when an off-taking off and taking off executing structure receives an off-taking off command request, the fixed oil charge pressure and time are selected based on the current action gear, the oil temperature and the main pressure, the pressure is increased according to a certain rate until the shifting fork generates position after the fixed oil charge pressure and time are reached, the variable pressure (increased pressure) time is recorded, the fixed oil charge pressure and time are corrected by comparing the variable pressure time with the reference time, and the shifting fork is ensured to charge oil rapidly and overcome self-locking pressure and static friction displacement at a proper speed. According to the technical scheme, oil filling can be ensured to cover the influences of different gear piston cavities and oil path volumes, main pressure and oil temperature, and the whole vehicle self-learning correction based on shifting fork moving time can fully cover the differences of different transmission piston cavities, oil paths and self-locking force and the differences of the same transmission positioning pin along with piston abrasion along with durable mileage, so that the optimal oil filling effect is ensured.

In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the present application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.

Claims

1. The self-adaptive control method for the oil filling of the synchronizer is characterized by comprising the following steps of:

controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to shift oil pressure based on gear shift pressure until the shifting fork moves, and recording gear shift pressure maintaining time, wherein the gear shift pressure is gradually increased from a preset first initial value; the gear fixed oil charge pressure comprises a first-stage gear oil charge pressure and a second-stage gear oil charge pressure, the gear fixed oil charge pressure maintenance time comprises a first-stage gear oil charge pressure maintenance time and a second-stage gear oil charge pressure maintenance time, the first-stage gear oil charge pressure maintenance time is the maintenance time of the first-stage gear oil charge pressure, the second-stage gear oil charge pressure maintenance time is the maintenance time of the second-stage gear oil charge pressure, and the first-stage gear oil charge pressure is greater than the second-stage gear oil charge pressure;

Controlling synchronizer oil charge based on the determined fixed oil charge in gear pressure and fixed oil charge in gear pressure hold time, comprising: controlling the synchronizer to fill the oil at the determined first-stage oil-up pressure for maintaining the oil at the first-stage oil-up pressure, and controlling the synchronizer to fill the oil at the determined second-stage oil-up pressure for maintaining the oil at the second-stage oil-up pressure;

correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintenance time based on the gear shift pressure maintenance time and a preset first reference time, wherein the pre-calibrated gear fixed oil filling pressure and gear fixed oil filling pressure maintenance time are corrected through the following formula;

wherein,indicating corrected first phase shift fill pressure +.>Indicating the first phase of shift filling pressure before correction,/->Indicating the first phase of oil-filled pressure correction factor, +.>Indicating the hold time of the gear-in pressure change,representing a first reference time; />Indicating the first phase of oil charge pressure hold time before correction, < >>Indicating the corrected first-stage oil-filled pressure maintenance time, < >>Representing a correction coefficient of the first-stage oil-filled pressure maintenance time; / >Indicating corrected second phase shift fill pressure, +.>Indicating the second phase of shift filling pressure before correction, +.>Representing a second-stage gear oil-filled pressure correction coefficient; />Indicating the corrected second-stage oil-filled pressure maintenance time, +.>Indicating the second stage before correction of the hold time of the oil charge pressure in gear, +.>And the second-stage gear oil charge pressure maintaining time correction coefficient is represented.

2. The method of claim 1, wherein the method further comprises:

3. The method of claim 2, wherein the off-hook fixed charge pressure comprises a first stage off-hook charge pressure and a second stage off-hook charge pressure, the off-hook fixed charge pressure maintenance time comprises a first stage off-hook charge pressure maintenance time and a second off-hook charge pressure maintenance time, the first stage off-hook charge pressure maintenance time is a first stage off-hook charge pressure maintenance time, the second off-hook charge pressure maintenance time is a second stage off-hook charge pressure maintenance time, and wherein the first stage off-hook charge pressure is greater than the second stage off-hook charge pressure;

4. A method according to claim 3, wherein modifying the pre-calibrated off-hook fixed charge pressure and/or off-hook fixed charge pressure hold time comprises:

wherein,indicating corrected first phase pick-up filling pressure +.>Indicating the first phase of the oil charge pressure before correction, +.>Indicating the first stage of oil-filled pressure correction factor, +.>The off-shift pressure maintaining time is represented,representing a second reference time; />Indicating the corrected first-stage oil-filled pressure maintenance time, < >>Indicating the first phase of oil charge pressure hold time before correction, < >>Representing a correction coefficient of the oil charge pressure maintenance time of the first stage; />Indicating corrected second phase oil pick-up charge pressure, +.>Indicating the second phase of the oil fill pressure before correction, +.>Representing a second-stage oil-pick-up filling pressure correction coefficient; />Indicating the corrected second-stage oil-filled pressure maintenance time, +.>Indicating the second stage before correction of the hold time of the oil charge pressure in gear, +.>Indicating a second off-hook charge pressure hold time correction factor.

5. Method according to claim 2, characterized in that the shift pressure is increased gradually with the current gear, the current oil temperature and the current main pressure overcoming neutral self-locking pressure as a preset first initial value and with a preset first fixed slope, and/or the shift pressure is increased gradually with the current gear, the current oil temperature and the current main pressure overcoming neutral self-locking pressure as a preset second initial value and with a preset second fixed slope.

6. An oil-filled adaptive control device for a synchronizer, comprising:

the first control module is used for controlling the synchronizer to charge oil based on the determined gear fixed oil charge pressure and gear fixed oil charge pressure maintaining time, controlling the synchronizer to gear oil pressure based on gear change pressure until the shifting fork moves, and recording gear change pressure maintaining time, wherein the gear change pressure is gradually increased from a preset first initial value; the gear fixed oil charge pressure comprises a first-stage gear oil charge pressure and a second-stage gear oil charge pressure, the gear fixed oil charge pressure maintenance time comprises a first-stage gear oil charge pressure maintenance time and a second-stage gear oil charge pressure maintenance time, the first-stage gear oil charge pressure maintenance time is the maintenance time of the first-stage gear oil charge pressure, the second-stage gear oil charge pressure maintenance time is the maintenance time of the second-stage gear oil charge pressure, and the first-stage gear oil charge pressure is greater than the second-stage gear oil charge pressure;

According to the determined fixed oil charge pressure in gear and the fixed oil charge pressure maintenance time in gear, the synchronizer is controlled to carry out fixed oil charge, and the method comprises the following steps: controlling the synchronizer to fill the oil at the determined first-stage oil-up pressure for maintaining the oil at the first-stage oil-up pressure, and controlling the synchronizer to fill the oil at the determined second-stage oil-up pressure for maintaining the oil at the second-stage oil-up pressure;

the first correction module is used for correcting the pre-calibrated gear fixed oil filling pressure and/or gear fixed oil filling pressure maintenance time based on the gear shift pressure maintenance time and a preset first reference time, wherein the pre-calibrated gear fixed oil filling pressure and gear fixed oil filling pressure maintenance time are corrected through the following formula;

wherein,indicating corrected first phase shift fill pressure +.>Indicating the first phase of shift filling pressure before correction,/->Indicating the first phase of oil-filled pressure correction factor, +.>Indicating the hold time of the gear-in pressure change,representing a first reference time; />Indicating the first phase of oil charge pressure hold time before correction, < >>Representing after correctionIs engaged for a first phase of the oil charge pressure maintenance time, < - >Representing a correction coefficient of the first-stage oil-filled pressure maintenance time; />Indicating corrected second phase shift fill pressure, +.>Indicating the second phase of shift filling pressure before correction, +.>Representing a second-stage gear oil-filled pressure correction coefficient; />Indicating the corrected second-stage oil-filled pressure maintenance time, +.>Indicating the second stage before correction of the hold time of the oil charge pressure in gear, +.>And the second-stage gear oil charge pressure maintaining time correction coefficient is represented.

7. The apparatus of claim 6, wherein the apparatus further comprises:

8. The apparatus of claim 7, wherein the off-hook fixed charge pressure comprises a first stage off-hook charge pressure and a second stage off-hook charge pressure, the off-hook fixed charge pressure maintenance time comprises a first stage off-hook charge pressure maintenance time and a second off-hook charge pressure maintenance time, wherein the first stage off-hook charge pressure maintenance time is a first stage off-hook charge pressure maintenance time, the second off-hook charge pressure maintenance time is a second stage off-hook charge pressure maintenance time, and the first stage off-hook charge pressure is greater than the second stage off-hook charge pressure;