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A control method for dual-motor electro-hydraulic brake system based on force control

An electro-hydraulic composite and braking system technology, applied in the direction of brakes, brake transmissions, transportation and packaging, etc., can solve the problems of increased control difficulty, achieve good brake pedal feel, and ensure the effect of brake pedal feel

Active Publication Date: 2017-02-08
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its dual-motor control mode, its control difficulty increases accordingly

Method used

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  • A control method for dual-motor electro-hydraulic brake system based on force control
  • A control method for dual-motor electro-hydraulic brake system based on force control
  • A control method for dual-motor electro-hydraulic brake system based on force control

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0036] When the driver steps on the brake pedal to generate a corresponding brake pedal displacement, the system tries to obtain the target total vehicle braking force requirement by querying the brake pedal displacement / brake pedal. At the same time, VMS obtains the maximum regenerative braking force through the driving state of the vehicle. The variation of maximum regenerative braking force with vehicle speed is as follows: image 3shown. When the vehicle is running at a very low speed, there are many fluctuations because the torque of the electric motor is unstable at low speed. Therefore, when the vehicle is at a very low speed, regenerative braking usually does not work, and the braking of the vehicle is all done by the traditional hydraulic braking system. And when the vehicle is in a low-speed state, because the working efficiency of...

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Abstract

The invention discloses a method for controlling a double-motor electric-hydraulic composite brake system on the basis of force control. The method includes controlling a brake motor to control target torque of the brake motor so as to brake a pedal force motor under the matching effect of the pedal force motor and regenerative brake force to generate corresponding target brake force; controlling a pedal force simulating motor to control brake pedal feel provided for a driver, and braking the pedal force motor under the matching effect of the pedal force motor and regenerative brake force to generate corresponding target brake force. The brake motor and the pedal force simulating motor are controlled in a force control mode. The method for controlling the double-motor electric-hydraulic composite brake system has the advantages the double-motor electric-hydraulic composite brake system can be controlled precisely, the robustness is excellent, and the excellent brake feel can be provided for the driver on the premise that brake intension of the driver can be implemented.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a brake system control technology, in particular to a force control-based dual-motor electro-hydraulic composite brake system control method. Background technique [0002] The braking system is a vital system related to the safety performance of the vehicle, and its performance will directly affect the driving safety performance of the vehicle. A traditional braking system usually consists of a brake pedal, vacuum booster, brake master cylinder, ESC / ABS, brake wheel cylinder and its corresponding pipelines. The whole system is relatively complex, and is at a disadvantage in volume, quality and integration. Moreover, as the efficiency of the engine continues to improve, the degree of vacuum it can provide to the vacuum booster becomes more and more limited. In order to make up for this problem caused by high-efficiency engines, many vehicles adopt an additional vacuum pump to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/66
Inventor 熊璐徐松云汪阳光余卓平
Owner TONGJI UNIV
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