CN114439927B - Synchronizer gear shifting control method based on electric actuator - Google Patents
Synchronizer gear shifting control method based on electric actuator Download PDFInfo
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- CN114439927B CN114439927B CN202210144642.3A CN202210144642A CN114439927B CN 114439927 B CN114439927 B CN 114439927B CN 202210144642 A CN202210144642 A CN 202210144642A CN 114439927 B CN114439927 B CN 114439927B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/0403—Synchronisation before shifting
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Abstract
The invention relates to the technical field of control of automatic transmissions, and discloses a synchronizer gear shifting control method based on an electric actuator, which comprises the following steps: s1, gear shifting and gear withdrawing; s2, removing the idle stroke by taking off; s3, locking; s4, synchronizing; s5, dialing a ring; s6, gear shifting, comprising: s61, determining the gear-in motor force and gear-in acceleration of the synchronizer; s62, the motor force output by the electric actuator is a gear-in motor force; s63, judging whether at least one of acceleration of the synchronizer is smaller than or equal to the gear-in acceleration and displacement of the moving end of the synchronizer is larger than gear-in displacement or not, if yes, executing S7; if not, returning to S61; s7, tooth feeding. According to the synchronizer gear shifting control method based on the electric actuator, through controlling the motor force of the electric actuator, the impact load of the synchronizer ring of the synchronizer is reduced, the mechanical impact noise generated during gear shifting is weakened, and the gear shifting time is shortened.
Description
Technical Field
The invention relates to the technical field of control of automatic transmissions, in particular to a synchronizer gear shifting control method based on an electric actuator.
Background
The synchronizer gear shifting is used as a typical gear shifting mode, the gear feeding of the synchronizer under the condition of rotating speed synchronization is ensured through the synchronization effect of the synchronizing ring, and the synchronizer gear shifting method is widely applied to automatic transmissions. In the gear shifting control process of the synchronizer, the motor force output by the electric actuator is unreasonable to control, so that the problems of large impact load of a synchronizer ring of the synchronizer, large mechanical impact noise and long synchronization time when gear shifting is finished are possibly caused.
Disclosure of Invention
Based on the above, the invention aims to provide a synchronizer gear shifting control method based on an electric actuator, which solves the problems of larger impact load of a synchronizer ring, larger mechanical impact noise and long synchronization time caused by unreasonable control of motor force.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a synchronizer gear shifting control method based on an electric actuator comprises the following steps:
s1, a synchronizer executes gear-shifting and gear-withdrawing actions, and motor force output by an electric actuator is gear-shifting and gear-withdrawing motor force;
s2, the synchronizer executes a gear-shifting and idle stroke eliminating action, and the motor force output by the electric actuator is the gear-shifting and idle stroke eliminating motor force;
s3, the synchronizer executes locking action, and the motor force output by the electric actuator is locking motor force;
s4, the synchronizer executes synchronous action, and the motor force output by the electric actuator is synchronous motor force;
s5, the synchronizer executes a shifting ring action, and the motor force output by the electric actuator is a shifting ring motor force;
s6, the synchronizer executes a gear shifting action, which comprises the following steps:
s61, determining a gear-entering motor force and gear-entering acceleration of the synchronizer according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission, wherein the gear-entering acceleration is the acceleration before the synchronizer starts to enter teeth;
s62, the motor force output by the electric actuator is the gear-in motor force;
s63, judging whether at least one of the acceleration of the synchronizer is smaller than or equal to the gear-in acceleration and the displacement of the moving end of the synchronizer, which is larger than the gear-in displacement, occurs, if yes, executing S7; if not, returning to the step S61, wherein the gear-entering displacement is the displacement required to move when the synchronizer starts to enter the gear;
and S7, the synchronizer executes the tooth advancing action, and the motor force output by the electric actuator is the tooth advancing motor force.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S1 includes:
s11, determining the force of the gear-shifting and gear-withdrawing motor according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-shifting and gear-withdrawing motor force;
s13, judging whether the displacement of the moving end of the synchronizer is larger than the tooth withdrawing displacement, and if yes, executing S2; if not, returning to S11, wherein the tooth withdrawing displacement is the displacement of the synchronizer for completing tooth withdrawing to move.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S2 includes:
s21, determining the power of the off-shift elimination idle stroke motor and the off-shift acceleration according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission, wherein the off-shift acceleration is the acceleration before the synchronizer starts to be locked;
s22, the motor force output by the electric actuator is the motor force of the shift removing idle stroke, and the displacement of the moving end movement of the synchronizer is recorded;
s23, judging whether the acceleration of the synchronizer is smaller than the off-shift acceleration and whether the displacement of the moving end of the synchronizer is larger than the off-shift displacement, if so, executing S3; if not, returning to S21; the shift-off displacement is the displacement required to move for starting the locking of the synchronizer.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S3 includes:
s31, determining the locking motor force and the locking time according to the current oil temperature of the transmission, the target gear and the rotating speed of the transmission output shaft, wherein the locking time is the time required by the completion of locking of the synchronizer;
s32, the motor force output by the electric actuator is the locking motor force, and the locking duration of the synchronizer is recorded;
s33, judging whether the locking time of the synchronizer is longer than the locking time, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving, if so, executing S4; if not, return to S31.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S4 includes:
s41, determining the synchronous motor force, the synchronous duration and the synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of the transmission output shaft, wherein the synchronous duration is the duration required by the synchronous completion of the synchronizer, and the synchronous speed is the speed of the synchronous completion of the synchronizer;
s42, the motor force output by the electric actuator is the synchronous motor force, and the synchronous duration of the synchronizer is recorded;
s43, if the synchronization time length of the synchronizer is longer than the synchronization time length and the synchronization speed of the synchronizer is longer than the synchronization speed, executing S5; otherwise, S41 is returned.
As a preferred embodiment of the electric actuator-based synchronizer shift control method, S43 includes:
s431, judging that the synchronization time length of the synchronizer is longer than the synchronization time length, if yes, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, if so, executing S5; if not, the process returns to S41.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S5 includes:
s51, determining the dial ring motor force according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission;
s52, the motor force output by the electric actuator is the dial ring motor force, and the shift of the movable end of the synchronizer is recorded;
s53, judging whether the shift of the movable end of the synchronizer is larger than the shift ring shift or not, if yes, executing S6; if not, returning to S51, wherein the shifting ring displacement is the displacement required to move before the moving end of the synchronizer starts to advance.
As a preferable aspect of the synchronizer shift control method based on the electric actuator, S7 includes:
s71, determining the force of the gear-in motor according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s72, the motor force output by the electric actuator is the tooth-entering motor force;
and S73, judging whether the gear shifting of the synchronizer is in place, if so, ending the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator.
As a preferable mode of the synchronizer shift control method based on the electric actuator, if the shift of the synchronizer determined in S73 is not in place, S7 further includes:
s74, judging whether the synchronizer stops moving, if so, executing S75; if not, returning to S71;
s75, determining the tooth entering waiting time of the synchronizer according to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output duration of the motor-free force of the electric actuator is recorded;
s77, judging whether the output duration of the motor-free force of the electric actuator is longer than the waiting duration of the tooth advance, and if so, returning to S71; if not, return to S75.
The beneficial effects of the invention are as follows: according to the synchronizer gear shifting control method based on the electric actuator, when a gear is shifted, once at least one of the acceleration of the synchronizer is not larger than the gear shifting acceleration and the displacement of the moving end of the synchronizer is larger than the gear shifting displacement, the gear shifting of the synchronizer is realized, and when the synchronizer performs gear shifting and gear withdrawing, gear shifting and idle stroke elimination, locking, synchronization, shifting ring, gear shifting and gear shifting, the impact load of the synchronizer synchronizing ring is reduced by controlling the motor force of the electric actuator, mechanical impact noise generated during gear shifting is weakened, and the time required by gear shifting is shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a flowchart of a synchronizer shift control method based on an electric actuator according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment provides a synchronizer gear shifting control method based on an electric actuator, which comprises the following steps:
s1, a synchronizer executes gear-shifting and gear-withdrawing actions, and motor force output by an electric actuator is gear-shifting and gear-withdrawing motor force;
s2, the synchronizer executes the gear-off and idle stroke eliminating action, and the motor force output by the electric actuator is the gear-off and idle stroke eliminating motor force;
s3, the synchronizer executes locking action, and the motor force output by the electric actuator is locking motor force;
s4, the synchronizer executes synchronous action, and the motor force output by the electric actuator is synchronous motor force;
s5, the synchronizer executes a shifting ring action, and the motor force output by the electric actuator is a shifting ring motor force;
s6, the synchronizer executes a gear shifting action, which comprises the following steps:
s61, determining a gear-in motor force and gear-in acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission, wherein the gear-in acceleration is the acceleration before the synchronizer starts to enter teeth;
s62, the motor force output by the electric actuator is a gear-in motor force;
s63, judging whether at least one of acceleration of the synchronizer is smaller than or equal to the gear-in acceleration and displacement of the moving end of the synchronizer is larger than gear-in displacement or not, if yes, executing S7; if not, returning to S61, wherein the gear-entering displacement is the displacement required to move when the synchronizer starts to enter the gear;
and S7, the synchronizer executes the tooth advancing action, and the motor force output by the electric actuator is the tooth advancing motor force.
It should be noted that, the shift-in shift in S63 is related to the specific structure of the synchronizer, the shift-in shift is already determined when the synchronizer leaves the factory, and the shift-in motor force and the shift-in acceleration are related to the current oil temperature, the target shift position and the rotation speed of the transmission output shaft, that is, once the oil temperature, the target shift position and the rotation speed of the transmission output shaft change, the shift-in motor force and the shift-in acceleration change accordingly.
According to the synchronizer gear shifting control method based on the electric actuator, when gear shifting is performed, once the acceleration of the synchronizer is not larger than the gear shifting acceleration and the displacement of the moving end of the synchronizer is larger than at least one of gear shifting displacement, the synchronizer enters the gear, gear shifting of the synchronizer is achieved, when the synchronizer performs gear shifting and gear withdrawing, gear shifting and idle stroke elimination, locking, synchronization, shifting ring, gear shifting and gear shifting, the impact load of the synchronizer synchronizing ring is reduced by controlling the motor force of the electric actuator, mechanical impact noise generated during gear shifting is weakened, and the time required by gear shifting is shortened.
Specifically, S1 includes:
s11, determining the force of the gear-shifting and gear-withdrawing motor according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-shifting and gear-withdrawing motor force;
s13, judging whether the displacement of the moving end of the synchronizer is larger than the tooth withdrawing displacement, and if so, executing S2; if not, returning to S11, wherein the tooth withdrawing displacement is the displacement of the synchronizer to complete tooth withdrawing.
It should be noted that, the gear-picking and gear-withdrawing motor force of this embodiment is related to the current oil temperature of the transmission, the current gear and the rotation speed of the transmission output shaft, so that the gear-picking and gear-withdrawing motor force is more reasonable, the gear-picking and gear-withdrawing motor is calibrated specifically according to experiments, the gear-withdrawing displacement is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the gear-withdrawing displacement is a fixed value.
Specifically, S2 includes:
s21, determining gear-off elimination idle stroke motor force and gear-off acceleration according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission, wherein the gear-off acceleration is the acceleration before the synchronizer starts to be locked;
s22, motor force output by the electric actuator is a gear-off and idle stroke motor force is eliminated, and displacement of movement of a moving end of the synchronizer is recorded;
s23, judging whether the acceleration of the synchronizer is smaller than the off-shift acceleration and whether the displacement of the moving end of the synchronizer is larger than the off-shift displacement, if so, executing S3; if not, returning to S21; the shift is the shift required for the synchronizer to start to shift.
It should be noted that, the power of the neutral motor for removing the gear and the acceleration of the gear are both related to the current oil temperature of the transmission, the current gear and the rotation speed of the output shaft of the transmission, so that the power of the neutral motor for removing the gear and the acceleration of the gear are more reasonable, the power of the neutral motor for removing the gear and the acceleration of the gear are calibrated specifically according to experiments, the displacement of the gear is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the displacement of the gear is a fixed value.
Specifically, S3 includes:
s31, determining locking motor force and locking time according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission, wherein the locking time is the time required by the completion of locking of the synchronizer;
s32, the motor force output by the electric actuator is locking motor force, and the locking time of the synchronizer is recorded; s33, judging whether the locking time of the synchronizer is longer than the locking time, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving, if so, executing S4; if not, return to S31.
It should be noted that, the locking motor force and the locking duration of the embodiment are related to the current oil temperature of the transmission, the target gear and the rotation speed of the output shaft of the transmission, so that the locking motor force and the locking duration are more reasonable, and the locking motor force and the locking duration are calibrated specifically according to experiments.
Specifically, S4 includes:
s41, determining synchronous motor force, synchronous duration and synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission, wherein the synchronous duration is the duration required by the synchronous completion of the synchronizer, and the synchronous speed is the speed of the synchronous completion of the synchronizer;
s42, the motor force output by the electric actuator is synchronous motor force, and the synchronous duration of the synchronizer is recorded;
s43, if the synchronous duration of the synchronizer is longer than the synchronous duration and the synchronous speed of the synchronizer is longer than the synchronous speed, executing S5; otherwise, S41 is returned.
It should be noted that, the synchronous motor force, the synchronous duration and the synchronous speed of the embodiment are all related to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, so that the synchronous motor force, the synchronous duration and the synchronous speed are more reasonable, and the synchronous motor force, the synchronous duration and the synchronous speed are calibrated specifically according to experiments.
Wherein S43 includes:
s431, judging that the synchronous duration of the synchronizer is longer than the synchronous duration, if yes, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, if so, executing S5; if not, the process returns to S41.
That is, in S43, it is first determined whether the synchronization duration of the synchronizer is longer than the synchronization duration, and S432 can be continuously performed only if the synchronization duration is longer than the synchronization duration, and whether the synchronization speed is greater than the synchronization speed is continuously determined, and if the synchronization speed of the synchronizer is greater than the synchronization speed, S5 is performed. If the synchronization duration is not greater than the synchronization duration, returning to S41; if the synchronization duration is longer than the synchronization duration, but the synchronization speed of the synchronizer is not longer than the synchronization speed, the process returns to S41.
Specifically, S5 includes:
s51, determining the motor force of a dial ring according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission;
s52, the motor force output by the electric actuator is a dial ring motor force, and the shift of the movable end of the synchronizer is recorded;
s53, judging whether the shift of the movable end of the synchronizer is larger than the shift ring shift, if so, executing S6; if not, returning to S51, wherein the shifting ring displacement is the displacement required to move before the moving end of the synchronizer starts to advance.
It should be noted that, the dial ring motor force of this embodiment is related to the current oil temperature of the transmission, the target gear and the rotation speed of the transmission output shaft, so that the dial ring motor force is more reasonable, the dial ring motor force is calibrated specifically according to experiments, the dial ring displacement is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the dial ring displacement is a fixed value.
Specifically, S7 includes:
s71, determining a gear feeding motor force according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission;
s72, the motor force output by the electric actuator is the tooth-entering motor force;
s73, judging whether the gear shifting of the synchronizer is in place, if so, ending the gear shifting of the synchronizer, wherein the motor force output by the electric actuator is 0; if not, then execution S74:
s74, judging whether the synchronizer stops moving, if so, executing S75; if not, returning to S71;
s75, determining the tooth entering waiting time of the synchronizer according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output duration of the motor-free force of the electric actuator is recorded;
s77, judging whether the output duration of the motor-free force of the electric actuator is longer than the waiting duration of the tooth advance, if so, returning to S71; if not, return to S75.
Specifically, once it is determined that the synchronizer gear shift is not in place, S74 is executed, so that a gear-entering top tooth complementary engagement measure is implemented, an increase in gear shift time period caused by the gear-entering top tooth of the synchronizer is prevented, and the time period consumed by synchronous gear shift is shortened.
It should be noted that, in this embodiment, the tooth-entering motor force is related to the current oil temperature of the transmission, the target gear and the rotation speed of the transmission output shaft, and the tooth-entering waiting period is related to the current oil temperature of the transmission, the current gear and the rotation speed of the transmission output shaft, so that the tooth-entering motor force and the tooth-entering waiting period are more reasonable, and the tooth-entering motor force and the tooth-entering waiting period are calibrated specifically according to an experiment.
As shown in fig. 1, the synchronizer gear shift control method based on the electric actuator of the present embodiment specifically includes:
s11, determining gear-off and gear-off motor force according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-shifting and gear-withdrawing motor force;
s13, judging whether the displacement of the moving end of the synchronizer is larger than the tooth withdrawing displacement, and if so, executing S21; if not, returning to S11, wherein the tooth withdrawing displacement is the displacement of the synchronizer for completing the tooth withdrawing to move;
s21, determining gear-off elimination idle stroke motor force and gear-off acceleration according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission, wherein the gear-off acceleration is the acceleration before the synchronizer starts to be locked;
s22, motor force output by the electric actuator is a gear-off and idle stroke motor force is eliminated, and displacement of movement of a moving end of the synchronizer is recorded;
s23, judging whether the acceleration of the synchronizer is smaller than the off-shift acceleration and whether the displacement of the moving end of the synchronizer is larger than the off-shift displacement, if so, executing S31; if not, returning to S21; the shift shifting is the shifting required by the locking start of the synchronizer;
s31, determining locking motor force and locking time according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission, wherein the locking time is the time required by the completion of locking of the synchronizer;
s32, the motor force output by the electric actuator is locking motor force, and the locking time of the synchronizer is recorded;
s33, judging whether the locking time of the synchronizer is longer than the locking time, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving, if so, executing S41; if not, returning to S31;
s41, determining synchronous motor force, synchronous duration and synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission, wherein the synchronous duration is the duration required by the synchronous completion of the synchronizer, and the synchronous speed is the speed of the synchronous completion of the synchronizer;
s42, the motor force output by the electric actuator is synchronous motor force, and the synchronous duration of the synchronizer is recorded;
s431, judging that the synchronous duration of the synchronizer is longer than the synchronous duration, if yes, executing S432; if not, returning to S41;
s431, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, if so, executing S51; if not, returning to S41;
s51, determining the motor force of a dial ring according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission;
s52, the motor force output by the electric actuator is a dial ring motor force, and the shift of the movable end of the synchronizer is recorded;
s53, judging whether the shift of the movable end of the synchronizer is larger than the shift ring shift, if yes, executing S61; if not, returning to S51, wherein the shifting ring displacement is the displacement required to be moved before the moving end of the synchronizer starts to enter the teeth;
s61, determining a gear-in motor force and gear-in acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission, wherein the gear-in acceleration is the acceleration before the synchronizer starts to enter teeth;
s62, the motor force output by the electric actuator is a gear-in motor force;
s63, judging whether at least one of acceleration of the synchronizer is smaller than or equal to the gear-in acceleration and displacement of the moving end of the synchronizer is larger than gear-in displacement or not, if yes, executing S71; if not, returning to S61, wherein the gear-entering displacement is the displacement required to move when the synchronizer starts to enter the gear;
s71, determining a gear feeding motor force according to the current oil temperature of the transmission, the target gear and the rotating speed of an output shaft of the transmission;
s72, the motor force output by the electric actuator is the tooth-entering motor force;
s73, judging whether the gear shifting of the synchronizer is in place, if so, ending the gear shifting of the synchronizer, wherein the motor force output by the electric actuator is 0; if not, executing S74;
s74, judging whether the synchronizer stops moving, if so, executing S75; if not, returning to S71;
s75, determining the tooth entering waiting time of the synchronizer according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output duration of the motor-free force of the electric actuator is recorded;
s77, judging whether the output duration of the motor-free force of the electric actuator is longer than the waiting duration of the tooth advance, if so, returning to S71; if not, return to S75.
The synchronizer gear shifting control method of the electric actuator ensures that the locking function of the synchronizer is reliable, reduces the impact load on the synchronizing ring, prolongs the service life of the synchronizer, reduces the mechanical impact noise after gear shifting of the synchronizer, and shortens the synchronization time and the gear shifting time.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. The synchronizer gear shifting control method based on the electric actuator is characterized by comprising the following steps of:
s1, the synchronizer executes gear-off and gear-off actions, the motor force output by the electric actuator is gear-off and gear-off motor force, comprising,
s11, determining the force of the gear-shifting and gear-withdrawing motor according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-shifting and gear-withdrawing motor force;
s13, judging whether the displacement of the moving end of the synchronizer is larger than the tooth withdrawing displacement, and if yes, executing S2; if not, returning to the step S11, wherein the tooth withdrawing displacement is the displacement of the synchronizer for completing tooth withdrawing to move;
s2, the synchronizer executes a gear-shifting and idle stroke eliminating action, and the motor force output by the electric actuator is the gear-shifting and idle stroke eliminating motor force;
s3, the synchronizer executes locking action, and the motor force output by the electric actuator is locking motor force;
s4, the synchronizer executes synchronous action, and the motor force output by the electric actuator is synchronous motor force;
s5, the synchronizer executes a shifting ring action, and the motor force output by the electric actuator is a shifting ring motor force;
s6, the synchronizer executes a gear shifting action, which comprises the following steps:
s61, determining a gear-entering motor force and gear-entering acceleration of the synchronizer according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission, wherein the gear-entering acceleration is the acceleration before the synchronizer starts to enter teeth;
s62, the motor force output by the electric actuator is the gear-in motor force;
s63, judging whether at least one of the acceleration of the synchronizer is smaller than or equal to the gear-in acceleration and the displacement of the moving end of the synchronizer, which is larger than the gear-in displacement, occurs, if yes, executing S7; if not, returning to the step S61, wherein the gear-entering displacement is the displacement required to move when the synchronizer starts to enter the gear;
and S7, the synchronizer executes the tooth advancing action, and the motor force output by the electric actuator is the tooth advancing motor force.
2. The electric actuator-based synchronizer shift control method according to claim 1, wherein S2 includes:
s21, determining the power of the off-shift elimination idle stroke motor and the off-shift acceleration according to the current oil temperature of the transmission, the current gear and the rotating speed of an output shaft of the transmission, wherein the off-shift acceleration is the acceleration before the synchronizer starts to be locked;
s22, the motor force output by the electric actuator is the motor force of the shift removing idle stroke, and the displacement of the moving end movement of the synchronizer is recorded;
s23, judging whether the acceleration of the synchronizer is smaller than the off-shift acceleration and whether the displacement of the moving end of the synchronizer is larger than the off-shift displacement, if so, executing S3; if not, returning to S21; the shift-off displacement is the displacement required to move for starting the locking of the synchronizer.
3. The electric actuator-based synchronizer shift control method according to claim 1, wherein S3 includes:
s31, determining the locking motor force and the locking time according to the current oil temperature of the transmission, the target gear and the rotating speed of the transmission output shaft, wherein the locking time is the time required by the completion of locking of the synchronizer;
s32, the motor force output by the electric actuator is the locking motor force, and the locking duration of the synchronizer is recorded;
s33, judging whether the locking time of the synchronizer is longer than the locking time, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving, if so, executing S4; if not, return to S31.
4. The electric actuator-based synchronizer shift control method according to claim 1, wherein S4 includes:
s41, determining the synchronous motor force, the synchronous duration and the synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of the transmission output shaft, wherein the synchronous duration is the duration required by the synchronous completion of the synchronizer, and the synchronous speed is the speed of the synchronous completion of the synchronizer;
s42, the motor force output by the electric actuator is the synchronous motor force, and the synchronous duration of the synchronizer is recorded;
s43, if the synchronization time length of the synchronizer is longer than the synchronization time length and the synchronization speed of the synchronizer is longer than the synchronization speed, executing S5; otherwise, S41 is returned.
5. The electric actuator-based synchronizer shift control method according to claim 4, wherein S43 includes:
s431, judging that the synchronization time length of the synchronizer is longer than the synchronization time length, if yes, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, if so, executing S5; if not, the process returns to S41.
6. The electric actuator-based synchronizer shift control method according to claim 1, wherein S5 includes:
s51, determining the dial ring motor force according to the current oil temperature of the transmission, a target gear and the rotating speed of an output shaft of the transmission;
s52, the motor force output by the electric actuator is the dial ring motor force, and the shift of the movable end of the synchronizer is recorded;
s53, judging whether the shift of the movable end of the synchronizer is larger than the shift ring shift or not, if yes, executing S6; if not, returning to S51, wherein the shifting ring displacement is the displacement required to move before the moving end of the synchronizer starts to advance.
7. The electric actuator-based synchronizer shift control method according to claim 1, wherein S7 includes:
s71, determining the force of the gear-in motor according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s72, the motor force output by the electric actuator is the tooth-entering motor force;
and S73, judging whether the gear shifting of the synchronizer is in place, if so, ending the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator.
8. The electric actuator-based synchronizer shift control method according to claim 7, wherein if the shift of the synchronizer determined in S73 is not in place, S7 further includes:
s74, judging whether the synchronizer stops moving, if so, executing S75; if not, returning to S71;
s75, determining the tooth entering waiting time of the synchronizer according to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output duration of the motor-free force of the electric actuator is recorded;
s77, judging whether the output duration of the motor-free force of the electric actuator is longer than the waiting duration of the tooth advance, and if so, returning to S71; if not, return to S75.
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| CN104608769B (en) * | 2014-10-20 | 2016-04-13 | 比亚迪股份有限公司 | The shift control method of electronlmobil and the motor speed control method based on gearshift |
| CN108506476B (en) * | 2018-04-03 | 2019-08-16 | 吉林大学 | A kind of synchronizer based on unilateral control pressurer system is into gear course control method for use |
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| CN111306293B (en) * | 2020-02-27 | 2021-08-10 | 一汽解放汽车有限公司 | Synchronizer gear shifting pneumatic control method based on switch valve |
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