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Control method for hydraulic dual motor-driven electronic hydraulic braking system

A dual-motor drive, hydraulic braking technology, applied in the direction of brakes, brake components, regenerative braking, etc., can solve the problem of increased control difficulty, achieve fast response, good robustness, and ensure the feel of the brake pedal. Effect

Inactive Publication Date: 2015-01-28
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although its structure has obvious advantages compared with other electronic hydraulic braking systems, due to its dual-motor control mode, the difficulty of control increases accordingly

Method used

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  • Control method for hydraulic dual motor-driven electronic hydraulic braking system
  • Control method for hydraulic dual motor-driven electronic hydraulic braking system
  • Control method for hydraulic dual motor-driven electronic hydraulic braking system

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0049] A hydraulic dual-motor driven electronic hydraulic brake system control method, when the brake pedal displacement sensor receives the brake pedal displacement signal to judge whether the vehicle is in the beginning of braking or braking in progress, first judge whether the brake system is faulty step:

[0050] (a) If it is judged that there is no fault and the vehicle is in normal working condition, then if figure 1 with figure 2 shown

[0051] (1) Determine the adjustment torque T of the second motor 25 in the second electronically controlled linear motion module 29 2 , used for the second motor 25 to make it cooperate with the driver to step on the brake pedal force and the regenerative braking force to generate the braking torque to obtain the target braking force;

[0052] (1-1) Obtain the total braking force demand F of the veh...

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Abstract

The invention discloses a control method for a hydraulic dual motor-driven electronic hydraulic braking system based on torque control. The control method comprises the following steps: judging whether the braking system is in failure, determining the adjustment torque T2 of a second motor in a second electronic control straight line motion module if the braking system is not in failure so as to match the second motor with the force of treading a brake pedal by a driver and regenerative brake force to generate a braking torque, and obtaining target braking force; meanwhile determining the adjustment torque T1 of a first motor in a first electronic control straight line motion module so as to provide the brake pedal feeling of the driver by the first motor; if the braking system is in failure, controlling electromagnetic valves through a switch to realize the switching of system braking modes under different failure conditions. The control method disclosed by the invention is accurate in control and high in response speed, and has good robustness; under the precondition of realizing the braking intention of the driver, a good braking feeling is provided for the driver, and hydraulic force is actively controlled, so that maximum recycling for braking energy is realized, and the braking requirement of automatic driving vehicles is met.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to an automobile braking control method, in particular to a dual-motor driven electronic hydraulic braking system control method. Background technique [0002] Electro-hydraulic brake system (EHB), as a relatively new type of brake system, is a kind of brake-by-wire system. It replaces some mechanical components with electronic components, and there is no direct connection between the brake pedal and the brake wheel cylinder. Connected, use the sensor to collect the driver's operation information and use it as the control intention, and the braking operation is completely completed by the hydraulic actuator. During the braking process of new energy vehicles, when the hydraulic braking force is applied to the wheels, the drive motor works in the state of regenerative braking and also applies regenerative braking force to the wheels, so that the effective braking of the vehicle is c...

Claims

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Application Information

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IPC IPC(8): B60T13/66B60T8/34
CPCB60T8/34B60T13/68B60T2270/60B60T2270/82B60T8/4081
Inventor 熊璐侯一萌广学令徐松云余卓平
Owner TONGJI UNIV
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