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ABS system based on combined mechanical hydraulic and motor feedback

An anti-lock braking and combined action technology, applied in the direction of brakes, etc., can solve the problems of high cost, poor control effect, complex system, etc., and achieve the effect of convenient control, fast response speed and cost reduction.

Inactive Publication Date: 2007-06-27
SHANGHAI FUEL CELL VEHICLE POWERTRAIN +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the hydraulic anti-lock braking system and the pneumatic anti-lock braking system have the disadvantages of complex system, high cost, and poor control effect under complex working conditions such as docking roads.

Method used

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  • ABS system based on combined mechanical hydraulic and motor feedback

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Embodiment Construction

[0008] As shown in Figure 1, the composite anti-lock control system of the four-wheel electric-wheel-drive electric vehicle of the present invention consists of an electro-hydraulic control unit, four hydraulic friction brakes, four wheel motors, four wheel speed sensors, and The motor drive power supply is composed.

[0009] When the driver implements an emergency braking operation, first, the electro-hydraulic control unit controls the hydraulic friction brake and the motor feedback braking to generate the maximum braking torque to ensure that the braking action takes effect in time. Calculate the angular deceleration of the wheels and the identified vehicle speed signal according to the rotational speed signal obtained by the wheel speed sensor. According to the anti-lock brake control logic, the target braking torque required by the wheel is given, and the target braking torque is calculated. The command is distributed to the hydraulic brake system and the motor at the same ti...

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Abstract

The ABS system based on mechanical hydraulic pressure and motor feedback consists of one electro-hydraulic control unit, one hydraulic friction brake, one wheel motor, one wheel rotation speed sensor and one motor power source. During emergency braking, the electro-hydraulic control unit controls the hydraulic friction brake and motor feedback brake to generate maximum braking torque for timely braking. The electro-hydraulic control unit obtains the rotation speed signal from the wheel rotation speed sensor, calculates the angular decoration of the wheel the vehicle speed signal and the required braking moment based on anti-locking logic, distributes the required braking moment in the hydraulic braking system and the motor, tracks the slow change component of the target braking moment with the hydraulic braking system, and realizes the fast regulation on the target braking moment with the motor moment, so as to realize the fast anti-locking braking.

Description

Technical field [0001] The invention relates to an ABS control system which is applied to an electric vehicle or a hybrid vehicle driven by electric wheels, and simultaneously adopts a mechanical hydraulic friction brake and a wheel motor as the actuator. Background technique [0002] The ABS system is a system that prevents the wheels from locking up during emergency braking. Usually it consists of a sensing system (wheel speed sensor), a hydraulic execution system and an electronic control unit. The wheel speed signal is used to identify the wheel lock state, and the hydraulic brake system is used to adjust the braking force of the wheel to achieve the purpose of preventing wheel lock. Usually its actuators are hydraulic brake systems or similar pneumatic brake systems. Current hydraulic anti-lock braking systems and pneumatic anti-lock braking systems have disadvantages such as complex systems, high costs, and poor control effects under complex working conditions such as docki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/174B60T8/176
Inventor 万钢余卓平熊璐张立军
Owner SHANGHAI FUEL CELL VEHICLE POWERTRAIN
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