Method for Controlling Rear Axle Clutch of Hybrid Electric Vehicle

Abstract

The invention discloses a method for controlling the rear axle clutch of a hybrid electric vehicle, comprising: S1: the powertrain controller collects relevant signals in real time; S2: judges whether it is necessary to enter the rear axle to shift gears according to the collected data, and if not, then Return to step S1, if yes, issue a corresponding gear shift request, and enter step S3; S3: Determine whether to perform the corresponding rear drive motor torque unloading process according to the corresponding gear shift request, if it is necessary to perform rear drive motor torque unloading, then in the rear When the actual torque of the driving motor reaches near zero torque, the shifting process is started; if it is not necessary to untwist the rear driving motor, the shifting process is directly started according to the corresponding shifting request judgment; S4: Judging according to the corresponding shifting request Rear drive motor mode request, whether the gear shift actuator is executed; S5: If the gear is successfully engaged, the rear drive motor enters the torque mode; if the gear is reversed successfully, the rear drive motor enters the standby state. The invention improves the drivability of the whole vehicle and reduces the shifting time.

Description

technical field [0001] The invention belongs to the technical field of clutch control, and in particular relates to a method for controlling a rear axle clutch of a hybrid electric vehicle. Background technique [0002] Many shifting mechanisms of electric vehicles and hybrid vehicles cancel the synchronizer of the traditional gearbox in structure, and generally rely on motor speed regulation to achieve the synchronization of the gear speed of the next target gear, and then complete the shift. [0003] The shifting process control is to avoid the phenomenon of the vehicle's frustration, gear hitting, and long-term loss of power during the shifting process, to ensure the smoothness and comfort of the whole vehicle, and to prolong the service life of related parts. [0004] The current vehicle still has the following problems in the gear shifting process: when the motor speed is adjusted, the torque of the speed adjustment is not limited, which will cause the vehicle to have a...

AI Technical Summary

Problems solved by technology

[0004] The current vehicle still has the following problems in the gear shifting process: when the motor speed is adjusted, the torque of the speed adjustment is not limited, which will cause the vehicle to have a large shifting impact under some working conditions, and even an obvious rattling sound, which will affect the smoothness of the vehicle sex and ride comfort

When the actual gear is in neutral, the motor is in a free state and will stay in the high speed zone for a long time, resulting in greater mechanical loss and wear of the motor, which affects the service life of the motor

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