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A method for anti-vibration braking of a drive motor of a hybrid vehicle

A technology for hybrid vehicles and drive motors, which is applied in electric vehicles, control drives, vehicle components, etc., and can solve problems such as rotational speed fluctuations

Active Publication Date: 2018-05-08
CHANGSHA CRRC INTELLIGENT CONTROL & NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the purposes of the present invention is to solve the technical defect that the driving motor of the existing hybrid vehicle easily causes speed fluctuations in the braking process

Method used

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  • A method for anti-vibration braking of a drive motor of a hybrid vehicle
  • A method for anti-vibration braking of a drive motor of a hybrid vehicle
  • A method for anti-vibration braking of a drive motor of a hybrid vehicle

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] The embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. And the features in the embodiments of the present invention can be combined with each other under the condition of no conflict.

[0044] Depend on figure 2 It can be seen that the braking vibration of the hybrid vehicle is mainly concentrated in the low speed range of the drive motor. At this time, the change of the motor speed will lead to the change of the maximum braking torque. In order to prevent vibration, the embodiment of the present invention sets the ...

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Abstract

The invention discloses a brake anti-shake method for a drive motor of a hybrid electric vehicle. The method comprises the following steps of detecting the required brake torque of the drive motor at the current moment, the brake target torque of the previous moment and the current speed of the drive motor; comparing the required brake torque at the current moment with the brake target torque of the previous moment, to identify the change tendency of brake torque; and under the condition that the drive motor is at a brake working condition at the previous moment and the change tendency of the brake torque tends to decline, if the current speed of the drive motor is at the low-speed stage, and the required brake torque at the current moment is lower than a low torque preset value, decreasing the required brake torque at the current moment according to the dynamic decline rate, wherein the dynamic decline rate is reduced as the speed of the drive motor is reduced, to avoid too fast decline of the speed of the drive motor. By applying the brake anti-shake method, the brake torque output by the drive motor is optimized on the premise of not changing the configuration of factory vehicles, and the brake performance of vehicles is improved.

Description

technical field [0001] The invention relates to the technical field of hybrid vehicles, in particular to a braking anti-vibration method for a drive motor of a hybrid vehicle. Background technique [0002] According to the different drive structure types of hybrid electric vehicles, the common structure of the drive chain of the hybrid power system is divided into two types: "engine-clutch-drive motor" or "engine-ISG motor-clutch-drive motor". When the vehicle speed is low, the clutch is disengaged, and the vehicle is directly driven by the driving motor; when the vehicle speed is high, the clutch is engaged, and the engine and the motor work together to jointly drive the vehicle. [0003] The hybrid system uses the drive motor to recover braking energy, and the recovered power is used to drive the vehicle, which can effectively reduce the driving time of the engine and reduce the fuel consumption of the vehicle. Most of the transmission chain structures of existing hybrid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/2009B60L2240/421B60L2240/423Y02T10/72
Inventor 汪伟宋超谢勇波李双龙席力克文健峰罗锐李熙
Owner CHANGSHA CRRC INTELLIGENT CONTROL & NEW ENERGY TECH CO LTD