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Integrated type drive-by-wire hydraulic braking system and ABS control method thereof

A technology of hydraulic braking and control methods, which is applied in the direction of brakes, brake transmissions, transportation and packaging, etc., which can solve problems such as difficult to deal with complex and changeable driving conditions, and achieve easy integration, reduced chattering, and responsive fast effect

Active Publication Date: 2019-04-05
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the traditional vehicle braking system is difficult to cope with complex and changeable driving conditions and different driving objectives, the utility model proposes an ABS control method based on the integrated wire-controlled hydraulic braking system (IEHB), combining Layered control framework, using the double closed-loop nonlinear control method composed of slip rate and braking torque, designed a tire slip rate controller based on the IEHB system, which can effectively control the tire slip rate of the car and improve the active performance of the car. safety performance

Method used

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  • Integrated type drive-by-wire hydraulic braking system and ABS control method thereof
  • Integrated type drive-by-wire hydraulic braking system and ABS control method thereof
  • Integrated type drive-by-wire hydraulic braking system and ABS control method thereof

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Embodiment Construction

[0049] Integrated hydraulic brake system (IEHB) such as figure 1 As shown, it includes a pedal stroke simulator 9, an actuator and an IEHB controller, and the actuator includes an electric brake master cylinder 7, hydraulic adjustment units (1, 4, 5, 10), sensors 6, motors 8, wheel cylinders Pressure sensor 2, low-pressure liquid storage tank 3, wherein, pedal stroke simulator 9 is responsible for identifying the driver's braking intention through the signal of the pedal displacement sensor, and simulating the feeling of the brake pedal through the pedal simulator; the electric brake master cylinder 7 is responsible for realizing hydraulic pressure. The fine adjustment of source output pressure; the hydraulic adjustment unit (1, 4, 5, 10) is responsible for monitoring the brake fluid pressure of each wheel cylinder, and tracking the target value by adjusting the actual braking torque of the wheel cylinder pressure; the sensor 6 is responsible for collecting The displacement of...

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Abstract

The invention discloses an integrated type drive-by-wire hydraulic braking system and an ABS control method thereof. According to the method, based on double closed-loops formed by the slip rate and the braking torque, a layered control framework comprising upper layer control, middle layer control and bottom layer control is adopted, the deviation between the current slip rate and the expected slip rate of an automobile is used as a control variable, the wheel cylinder target pressure is calculated, and the braking wheel cylinder pressure is adjusted. The system is high in control accuracy, high in response speed and capable of being easily integrated to other control functions.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to an integrated wire-controlled hydraulic braking system and an ABS control method thereof. Background technique [0002] Vehicle anti-lock braking system (Anti-lock Braking System, referred to as ABS) is the most widely used vehicle dynamics electronic control device, its task is to keep the wheel slip rate at the best by adjusting the pressure of the brake wheel cylinder in real time The slip ratio is close to improve the braking stability of the vehicle and shorten the braking distance. Foreign companies have done more in-depth research on ABS, mastered many mature technologies including control strategies and road surface identification, and have been widely used in various vehicles; while the domestic grasp and understanding of ABS key technologies are not deep enough, relatively mature Products are basically designed based on the logic threshold control method of wheel acce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/1761B60T8/40B60T13/68
CPCB60T8/1761B60T8/409B60T13/12B60T13/686
Inventor 季学武费聪何祥坤唐惟胜王洪民刘玉龙杨恺明武健刘亚辉
Owner TSINGHUA UNIV
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