CN114439927A - 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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- CN114439927A CN114439927A CN202210144642.3A CN202210144642A CN114439927A CN 114439927 A CN114439927 A CN 114439927A CN 202210144642 A CN202210144642 A CN 202210144642A CN 114439927 A CN114439927 A CN 114439927A
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- synchronizer
- gear
- motor force
- electric actuator
- shifting
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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
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 stripping and tooth retreating; s2, gear shifting and idle stroke elimination; s3, locking; s4, synchronization; s5, pulling a ring; s6, entering a gear, comprising: s61, determining the gear shifting motor force and the gear shifting acceleration of the synchronizer; 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-entering acceleration and the displacement of the moving end of the synchronizer is larger than the gear-entering displacement occurs, if so, executing S7; if not, returning to S61; and S7, feeding the teeth. According to the synchronizer gear-shifting control method based on the electric actuator, disclosed by the invention, the motor force of the electric actuator is controlled, so that the impact load of a 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 is used as a typical gear shifting mode, the synchronous action of a synchronous ring is used for ensuring that the synchronizer enters the gear under the condition of synchronous rotating speed, and the synchronizer is widely applied to automatic transmissions. In the shifting control process of the synchronizer, the electric actuator outputs unreasonable electric power control, which may cause the problems of large impact load of a synchronizer ring, large mechanical impact noise at the end of shifting, long synchronization time and the like.
Disclosure of Invention
Based on the above, the invention aims to provide a shifting control method of a synchronizer based on an electric actuator, which solves the problems of large impact load of a synchronizer ring, large mechanical impact noise at the end of shifting and long synchronization time caused by unreasonable electric power control.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electric actuator based synchronizer shift control method, comprising:
s1, the synchronizer executes gear-disengaging and gear-withdrawing actions, and the motor force output by the electric actuator is the gear-disengaging and gear-withdrawing motor force;
s2, the synchronizer executes a neutral stroke removing action of gear picking, and the motor force output by the electric actuator is the neutral stroke removing motor force of gear picking;
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 ring shifting action, and the motor force output by the electric actuator is ring shifting motor force;
s6, the synchronizer executes a gear shifting action, and the gear shifting action comprises the following steps:
s61, determining a gear-shifting motor force and a gear-shifting acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the gear-shifting acceleration is the acceleration before the synchronizer starts to shift gears;
s62, the motor force output by the electric actuator is the gear-shifting 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 is larger than the gear-in displacement or not, if yes, executing S7; if not, returning to the step S61, wherein the gear shifting displacement is the displacement required by the synchronizer to start to move;
and S7, the synchronizer executes a tooth entering action, and the motor force output by the electric actuator is the tooth entering motor force.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S1 includes:
s11, determining the gear disengaging and reversing motor force according to the current oil temperature and the current gear of the transmission and the rotating speed of the output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-disengaging and gear-reversing motor force;
s13, judging whether the moving displacement of the moving end of the synchronizer is larger than the tooth retreating displacement or not, if so, executing S2; if not, returning to S11, wherein the tooth-stripping displacement is the displacement of the synchronizer to complete tooth stripping.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S2 includes:
s21, determining neutral stroke motor force and gear disengaging acceleration of the gear disengaging elimination according to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission, wherein the gear disengaging acceleration is the acceleration before the synchronizer starts to lock;
s22, taking the motor force output by the electric actuator as the neutral stroke motor force for gear disengagement elimination, and recording the displacement of the moving end of the synchronizer;
s23, judging whether the acceleration of the synchronizer is smaller than the gear-off acceleration and whether the moving displacement of the moving end of the synchronizer is larger than the gear-off displacement, if so, executing S3; if not, returning to S21; and the gear-off displacement is the displacement which needs to be moved when the locking of the synchronizer starts.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S3 includes:
s31, determining the locking motor force and the locking duration according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the locking duration is the duration required by the completion of the locking of the synchronizer;
s32, taking the motor force output by the electric actuator as the locking motor force, and recording the locking time length of the synchronizer;
s33, judging whether the locking duration of the synchronizer is greater than the locking duration, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving or not, if so, executing S4; if not, the process returns to S31.
As a preferable aspect of the electric actuator-based synchronizer shift control method, 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 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 the synchronous motor force, and the synchronous time length of the synchronizer is recorded;
s43, if the synchronous time length of the synchronizer is greater than the synchronous time length and the synchronous speed of the synchronizer is greater than the synchronous speed, executing S5; otherwise, return to S41.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S43 includes:
s431, judging that the synchronization time length of the synchronizer is greater than the synchronization time length, and if so, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, and if so, executing S5; if not, the process returns to S41.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S5 includes:
s51, determining the ring shifting motor force according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s52, the motor force output by the electric actuator is the ring shifting motor force, and the shift of the moving end of the synchronizer into the gear is recorded;
s53, judging whether the shift of the moving end of the synchronizer is larger than the shift ring displacement, 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 enter the teeth.
As a preferable aspect of the electric actuator-based synchronizer shift control method, S7 includes:
s71, determining the gear-entering motor force 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 gear-in motor force;
and S73, judging whether the gear shifting of the synchronizer is in place or not, if so, finishing the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator.
As a preferable mode of the electric actuator-based synchronizer shift control method, if the shift of the synchronizer determined in S73 is not in place, S7 further includes:
s74, judging whether the synchronizer stops moving or not, 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 and the current gear of the transmission 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 time length of the electric actuator without the motor force is recorded;
s77, judging whether the output time length of the electric actuator without the motor power is longer than the gear-in waiting time length, if so, returning to S71; if not, the process returns to S75.
The invention has the beneficial effects that: the invention discloses a synchronizer gear-shifting control method based on an electric actuator, which is characterized in that when a synchronizer enters a gear, once the acceleration of the synchronizer is not more than the gear-entering acceleration and the moving displacement of a moving end of the synchronizer is more than at least one of the gear-entering displacement, the synchronizer enters the gear to realize the gear shifting of the synchronizer, and when the synchronizer performs gear-disengaging and gear-disengaging, gear-disengaging to eliminate idle stroke, locking, synchronization, a shifting ring, gear entering and gear entering, the impact load of the synchronizing ring of the synchronizer is reduced by controlling the motor force of the electric actuator, the 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 in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a flow chart of a method for electric actuator based synchronizer shift control in accordance with an exemplary embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, 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 a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a synchronizer gear-shifting control method based on an electric actuator, which comprises the following steps:
s1, the synchronizer executes gear-disengaging and gear-withdrawing actions, and the motor force output by the electric actuator is the gear-disengaging and gear-withdrawing motor force;
s2, the synchronizer executes the action of gear-off and idle stroke elimination, and the motor force output by the electric actuator is the motor force of gear-off and idle stroke elimination;
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 ring shifting action, and the motor force output by the electric actuator is ring shifting motor force;
s6, the synchronizer executes the gear shifting action and comprises the following steps:
s61, determining the gear-shifting motor force and the gear-shifting acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the gear-shifting acceleration is the acceleration before the synchronizer starts to shift gears;
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-entering acceleration and the displacement of the moving end of the synchronizer is larger than the gear-entering displacement occurs, if so, executing S7; if not, returning to S61, wherein the shift displacement is the displacement required by the start of the synchronizer shift;
and S7, the synchronizer executes a tooth entering action, and the motor force output by the electric actuator is the tooth entering motor force.
It should be noted that the shift-in displacement in S63 is related to the specific structure of the synchronizer, the shift-in displacement is determined when the synchronizer is shipped from the factory, and the shift-in motor force and the shift-in acceleration are related to the current oil temperature, the target gear and the rotation speed of the output shaft of the transmission, that is, once the oil temperature, the target gear and the rotation speed of the output shaft of the transmission are changed, the shift-in motor force and the shift-in acceleration are also changed accordingly.
In the shifting control method of the synchronizer based on the electric actuator provided by the embodiment, during shifting, once the acceleration of the synchronizer is not greater than the shifting acceleration and the moving displacement of the moving end of the synchronizer is greater than at least one of the shifting displacements, the synchronizer shifts gears, and when the synchronizer performs gear disengagement and gear disengagement, gear disengagement and idle stroke elimination, locking, synchronization, a shifting ring, shifting and gear shifting, the motor force of the electric actuator is controlled, so that the impact load of the synchronizer synchronizing ring is reduced, the mechanical impact noise generated during shifting is weakened, and the time required by shifting is shortened.
Specifically, S1 includes:
s11, determining the gear-disengaging and gear-reversing motor force according to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission;
s12, the motor force output by the electric actuator is a gear-disengaging and gear-disengaging motor force;
s13, judging whether the moving displacement of the moving end of the synchronizer is larger than the tooth retreating displacement or not, if so, executing S2; if not, the process returns to step S11, where the tooth-stripping displacement is the displacement that the synchronizer needs to move to complete tooth stripping.
It should be noted that, the gear-disengaging and gear-reversing motor force of the embodiment is related to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission, so that the gear-disengaging and gear-reversing motor force is more reasonable, the gear-disengaging and gear-reversing motor body is calibrated according to experiments, the gear-reversing displacement is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the gear-reversing displacement is a fixed value.
Specifically, S2 includes:
s21, determining neutral stroke motor force and gear-disengaging acceleration for gear-disengaging elimination according to the current oil temperature and the current gear of the transmission and the rotating speed of the output shaft of the transmission, wherein the gear-disengaging acceleration is the acceleration before the synchronizer starts to lock;
s22, taking the motor force output by the electric actuator as the neutral stroke motor force for gear disengagement elimination, and recording the displacement of the moving end of the synchronizer;
s23, judging whether the acceleration of the synchronizer is smaller than the gear-off acceleration and whether the moving displacement of the moving end of the synchronizer is larger than the gear-off displacement, if so, executing S3; if not, returning to S21; the gear-off displacement is the displacement required for starting locking of the synchronizer to move.
It should be noted that, the neutral trip motor force and the gear disengaging acceleration for gear disengaging elimination in this embodiment are both related to the current oil temperature of the transmission, the current gear and the rotation speed of the transmission output shaft, so that the neutral trip motor force and the gear disengaging acceleration for gear disengaging elimination are more reasonable, the neutral trip motor force and the gear disengaging acceleration for gear disengaging elimination are specifically calibrated according to experiments, the gear disengaging displacement is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the gear disengaging displacement is a fixed value.
Specifically, S3 includes:
s31, determining the locking motor force and the locking duration according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the locking duration is the duration required by the completion of the locking of the synchronizer;
s32, taking the motor force output by the electric actuator as a locking motor force, and recording the locking duration of the synchronizer; s33, judging whether the locking duration of the synchronizer is greater than the locking duration, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving, if so, executing S4; if not, the process returns to S31.
It should be noted that, the locking motor force and the locking duration of this embodiment are all related to the current oil temperature of the transmission, the target gear and the rotation speed of the transmission output shaft, so that the locking motor force and the locking duration are more reasonable, and the locking motor force and the locking duration are specifically calibrated according to experiments.
Specifically, S4 includes:
s41, determining synchronous motor force, synchronous time and synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the synchronous time is the time required by the synchronizer to finish synchronization, and the synchronous speed is the speed of the synchronizer to finish synchronization;
s42, the motor force output by the electric actuator is synchronous motor force, and the synchronous time length of the synchronizer is recorded;
s43, if the synchronous time length of the synchronizer is greater than the synchronous time length and the synchronous speed of the synchronizer is greater than the synchronous speed, executing S5; otherwise, return to S41.
It should be noted that the synchronous motor force, the synchronous time length, and the synchronous speed of the present embodiment are all related to the current oil temperature of the transmission, the target gear, and the rotational speed of the transmission output shaft, so that the synchronous motor force, the synchronous time length, and the synchronous speed are more reasonable, and the synchronous motor force, the synchronous time length, and the synchronous speed are specifically calibrated according to experiments.
Wherein S43 includes:
s431, judging that the synchronization time length of the synchronizer is greater than the synchronization time length, if so, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, and if so, executing S5; if not, the process returns to S41.
That is, in S43, it is first determined whether the length of time for synchronizer synchronization is greater than the synchronization length of time, S432 is continuously performed only if the length of time for synchronization is greater than the synchronization length of time, and it is continuously determined whether the speed for synchronization is greater than the synchronization speed, and if the speed for synchronizer synchronization is greater than the synchronization speed, S5 is performed. If the synchronous time length is not greater than the synchronous time length, returning to the step S41; if the synchronization duration is greater than the synchronization duration but the synchronizer synchronization speed is not greater than the synchronization speed, the process also returns to S41.
Specifically, S5 includes:
s51, determining the power of a ring shifting motor according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s52, the motor force output by the electric actuator is the ring shifting motor force, and the shift of the moving end of the synchronizer into the gear is recorded;
s53, judging whether the shift of the moving end of the synchronizer is larger than the shift ring displacement, if so, executing S6; if not, the process returns to S51, where the shift ring displacement is the displacement required to move before the moving end of the synchronizer starts to enter the teeth.
It should be noted that, the ring shifting motor force of the embodiment is 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 ring shifting motor force is more reasonable, the ring shifting motor force is specifically calibrated according to an experiment, the ring shifting displacement is related to the structure of the synchronizer, and once the structure of the synchronizer is determined, the ring shifting displacement is a fixed value.
Specifically, S7 includes:
s71, determining a gear-entering motor force 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 gear-entering motor force;
s73, judging whether the gear shifting of the synchronizer is in place or not, if so, finishing the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator; if not, go to 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 the output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output time length of the electric actuator without the motor force is recorded;
s77, judging whether the output time length of the electric actuator without the motor power is longer than the tooth entering waiting time length, if so, returning to S71; if not, the process returns to S75.
Specifically, once it is determined that the synchronizer shift is not in place, S74 is executed, so that an upshift operation measure is implemented, an increase in shift time period caused by the synchronizer upshift is prevented, and the time period required for the synchronous shift is shortened.
It should be noted that the tooth entering motor force of the embodiment is related to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, and the tooth entering waiting time is related to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission, so that the tooth entering motor force and the tooth entering waiting time are more reasonable, and the tooth entering motor force and the tooth entering waiting time are specifically calibrated according to experiments.
As shown in fig. 1, the method for controlling shifting of a synchronizer based on an electric actuator of the present embodiment specifically includes:
s11, determining the gear-disengaging and gear-reversing motor force according to the current oil temperature and the current gear of the transmission and the rotating speed of the output shaft of the transmission;
s12, the motor force output by the electric actuator is a gear-disengaging and gear-disengaging motor force;
s13, judging whether the moving displacement of the moving end of the synchronizer is larger than the tooth retreating displacement or not, if so, executing S21; if not, returning to S11, wherein the tooth-withdrawing displacement is the displacement of the synchronizer to complete tooth-withdrawing movement;
s21, determining neutral stroke motor force and gear-disengaging acceleration for gear-disengaging elimination according to the current oil temperature and the current gear of the transmission and the rotating speed of the output shaft of the transmission, wherein the gear-disengaging acceleration is the acceleration before the synchronizer starts to lock;
s22, taking the motor force output by the electric actuator as the neutral stroke motor force for gear disengagement elimination, and recording the displacement of the moving end of the synchronizer;
s23, judging whether the acceleration of the synchronizer is smaller than the gear-off acceleration and whether the moving displacement of the moving end of the synchronizer is larger than the gear-off displacement, if so, executing S31; if not, returning to S21; the gear-off displacement is the displacement required to move when the locking of the synchronizer starts;
s31, determining the locking motor force and the locking duration according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the locking duration is the duration required by the completion of the locking of the synchronizer;
s32, taking the motor force output by the electric actuator as a locking motor force, and recording the locking duration of the synchronizer;
s33, judging whether the locking duration of the synchronizer is greater than the locking duration, 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 time and synchronous speed according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the synchronous time is the time required by the synchronizer to finish synchronization, and the synchronous speed is the speed of the synchronizer to finish synchronization;
s42, the motor force output by the electric actuator is synchronous motor force, and the synchronous time length of the synchronizer is recorded;
s431, judging that the synchronization time length of the synchronizer is greater than the synchronization time length, if so, 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 power of a ring shifting motor according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s52, the motor force output by the electric actuator is the ring shifting motor force, and the shift of the moving end of the synchronizer into the gear is recorded;
s53, judging whether the shift of the moving end of the synchronizer is larger than the shift ring displacement, if so, executing S61; if not, returning to S51, wherein the shifting ring displacement is the displacement required to move before the moving end of the synchronizer enters the teeth;
s61, determining the gear-shifting motor force and the gear-shifting acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the gear-shifting acceleration is the acceleration before the synchronizer starts to shift gears;
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-entering acceleration and the displacement of the moving end of the synchronizer is larger than the gear-entering displacement occurs, if so, executing S71; if not, returning to S61, wherein the shift entering displacement is the displacement of the synchronizer required to move when the gear entering of the synchronizer starts;
s71, determining a gear-entering motor force 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 gear-entering motor force;
s73, judging whether the gear shifting of the synchronizer is in place or not, if so, finishing the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator; if not, go to 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 the output shaft of the transmission;
s76, the motor force output by the electric actuator is 0, and the output time length of the electric actuator without the motor force is recorded;
s77, judging whether the output time length of the electric actuator without the motor power is longer than the tooth entering waiting time length, if so, returning to S71; if not, the process returns to S75.
The shifting control method for the synchronizer of the electric actuator ensures that the locking function of the synchronizer is reliable, reduces impact load on a synchronizing ring, prolongs the service life of the synchronizer, reduces mechanical impact noise generated when the shifting of the synchronizer is finished, and shortens the synchronizing time and the shifting time.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. A method for controlling shifting of a synchronizer based on an electric actuator is characterized by comprising the following steps:
s1, the synchronizer executes gear-disengaging and gear-withdrawing actions, and the motor force output by the electric actuator is the gear-disengaging and gear-withdrawing motor force;
s2, the synchronizer executes a neutral stroke removing action of gear picking, and the motor force output by the electric actuator is the neutral stroke removing motor force of gear picking;
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 ring shifting action, and the motor force output by the electric actuator is ring shifting motor force;
s6, the synchronizer executes a gear shifting action, and the gear shifting action comprises the following steps:
s61, determining a gear-shifting motor force and a gear-shifting acceleration of the synchronizer according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the gear-shifting acceleration is the acceleration before the synchronizer starts to shift gears;
s62, the motor force output by the electric actuator is the gear-shifting 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 is larger than the gear-in displacement or not, if yes, executing S7; if not, returning to the step S61, wherein the gear shifting displacement is the displacement required by the synchronizer to start to move;
and S7, the synchronizer executes a tooth entering action, and the motor force output by the electric actuator is the tooth entering motor force.
2. The electric actuator-based synchronizer shift control method according to claim 1, wherein S1 comprises:
s11, determining the gear disengaging and reversing motor force according to the current oil temperature and the current gear of the transmission and the rotating speed of the output shaft of the transmission;
s12, the motor force output by the electric actuator is the gear-disengaging and gear-reversing motor force;
s13, judging whether the moving displacement of the moving end of the synchronizer is larger than the tooth retreating displacement or not, if so, executing S2; if not, returning to S11, wherein the tooth-stripping displacement is the displacement of the synchronizer to complete tooth stripping.
3. The electric actuator-based synchronizer shift control method according to claim 1, wherein S2 comprises:
s21, determining neutral stroke motor force and gear disengaging acceleration of the gear disengaging elimination according to the current oil temperature of the transmission, the current gear and the rotating speed of the output shaft of the transmission, wherein the gear disengaging acceleration is the acceleration before the synchronizer starts to lock;
s22, taking the motor force output by the electric actuator as the neutral stroke motor force for gear disengagement elimination, and recording the displacement of the moving end of the synchronizer;
s23, judging whether the acceleration of the synchronizer is smaller than the gear-off acceleration and whether the moving displacement of the moving end of the synchronizer is larger than the gear-off displacement, if so, executing S3; if not, returning to S21; and the gear-disengaging displacement is the displacement required to move when the locking of the synchronizer starts.
4. The electric actuator-based synchronizer shift control method according to claim 1, wherein S3 comprises:
s31, determining the locking motor force and the locking duration according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission, wherein the locking duration is the duration required by the synchronizer to complete locking;
s32, taking the motor force output by the electric actuator as the locking motor force, and recording the locking time length of the synchronizer;
s33, judging whether the locking duration of the synchronizer is greater than the locking duration, if so, executing S34; if not, returning to S31;
s34, judging whether the synchronizer stops moving or not, if so, executing S4; if not, the process returns to S31.
5. The electric actuator-based synchronizer shift control method according to claim 1, wherein S4 comprises:
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 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 the synchronous motor force, and the synchronous time length of the synchronizer is recorded;
s43, if the synchronous time length of the synchronizer is greater than the synchronous time length and the synchronous speed of the synchronizer is greater than the synchronous speed, executing S5; otherwise, return to S41.
6. The electric actuator-based synchronizer shift control method according to claim 5, wherein S43 comprises:
s431, judging that the synchronization time length of the synchronizer is greater than the synchronization time length, and if so, executing S432; if not, returning to S41;
s432, judging whether the synchronous speed of the synchronizer is greater than the synchronous speed, and if so, executing S5; if not, the process returns to S41.
7. The electric actuator-based synchronizer shift control method according to claim 1, wherein S5 comprises:
s51, determining the ring shifting motor force according to the current oil temperature of the transmission, the target gear and the rotating speed of the output shaft of the transmission;
s52, the motor force output by the electric actuator is the ring shifting motor force, and the shift of the moving end of the synchronizer into the gear is recorded;
s53, judging whether the shift of the moving end of the synchronizer is larger than the shift ring displacement, 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 enters the teeth.
8. The electric actuator-based synchronizer shift control method according to claim 1, wherein S7 comprises:
s71, determining the gear-entering motor force 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 gear-in motor force;
and S73, judging whether the gear shifting of the synchronizer is in place or not, if so, finishing the gear shifting of the synchronizer, and outputting the motor force of 0 by the electric actuator.
9. The electric actuator-based synchronizer shift control method according to claim 8, wherein if the shift of the synchronizer determined in S73 is not in place, S7 further comprises:
s74, judging whether the synchronizer stops moving or not, 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 and the current gear of the transmission 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 time length of the electric actuator without the motor force is recorded;
s77, judging whether the output time length of the electric actuator without the motor power is longer than the gear-in waiting time length, if so, returning to S71; if not, return is made to S75.
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