Downshift control method in deceleration process and related equipment

A control method and deceleration process technology, applied in the field of vehicles, can solve problems such as poor driving experience

Pending Publication Date: 2022-02-08
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that during the above downshifting process, the output torque of the motor undergoes a change of decrease and then increase, so that the acceleration of the vehicle deceleration also undergoes a change of decrease and then increase, which leads to a significant change in vehicle deceleration, resulting in a poor driving experience

Method used

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  • Downshift control method in deceleration process and related equipment
  • Downshift control method in deceleration process and related equipment
  • Downshift control method in deceleration process and related equipment

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Embodiment Construction

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0051] method embodiment

[0052] see figure 1 , which is a flow chart of a downshift control method during deceleration provided by an embodiment of the present application.

[0053] The downshift control method during the deceleration process provided by the embodiment of the present application includes S1-S6:

[0054] S1: After the controller receives the ...

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Abstract

The invention discloses a downshift control method in a deceleration process and related equipment, and the method comprises the steps: obtaining a wheel end demand torque after a motor downshift request is received; determining a first target torque of the motor and a first target torque of compensation equipment according to the wheel end demand torque; controlling the actual torque of the motor to be unloaded to 0 according to the first target torque of the motor, and controlling the actual torque of the compensation equipment to be loaded to the wheel end required torque according to the first target torque of the compensation equipment; controlling the motor to perform downshift, and determining a second target torque of the motor and a second target torque of the compensation equipment according to the wheel end demand torque when the motor is determined to descend to the target gear; controlling the actual torque of the motor to be loaded to the wheel end demand torque according to the second target torque of the motor, and controlling the actual torque of the compensation equipment to be unloaded to 0 according to the second target torque of the compensation equipment. In this way, vehicle deceleration is stable in the motor downshift process, and the driving experience is improved.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a downshift control method and related equipment during deceleration. Background technique [0002] At present, during the deceleration process of vehicles (for example, new energy vehicles such as pure electric vehicles and hybrid vehicles) (for example, deceleration processes such as loose throttle coasting and braking deceleration), when the motor in the vehicle needs to downshift, it can control The motor is downshifted according to the following downshifting process, and the downshifting process is as follows: first control the motor to unload the feedback torque (that is, the torque required by the wheel end) in the non-shifting process, then control the motor to downshift, and when the motor downshifts After the gear is completed, the motor is reloaded back to the feedback torque of the non-shifting process. It can be seen that during the downshifting process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20H02P29/00
CPCB60L15/20H02P29/00Y02T10/64Y02T10/72
Inventor 孙俊耿鹏马良峰罗翔
Owner SAIC MOTOR
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