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Wire driven hydraulic parking braking system for full-wheel steering electric-wheel car

A technology for electric-wheel vehicles and braking systems, applied in ABS control systems, hydraulic brake transmissions, brakes, etc., can solve problems such as inability to adapt to independent steering of wheels, achieve high reliability, reduce use frequency, and respond quick effect

Inactive Publication Date: 2016-06-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because each wheel can be turned independently, the parking brake device used in traditional cars cannot adapt to the characteristics of independent steering of all wheels, and is no longer applicable

Method used

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  • Wire driven hydraulic parking braking system for full-wheel steering electric-wheel car
  • Wire driven hydraulic parking braking system for full-wheel steering electric-wheel car

Examples

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Embodiment Construction

[0021] The present invention will be further described below by means of embodiments and in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, a wire-controlled hydraulic parking brake system for an all-wheel steering electric wheel vehicle includes:

[0023] Electric hydraulic pump 2, accumulator 4, and pressure reducing valve 5 generate hydraulic pressure for parking brake;

[0024] Parking brake valve 6, manual parking valve 7, driving / parking switching valve 10, used to control the parking hydraulic circuit;

[0025] The parking brake switch 8 and the pressure sensors 11, 12, 13 are used for setting the working mode of the wire-controlled hydraulic parking device and monitoring the system pressure;

[0026] The parking brake electronic control unit (ECU) 9 is used for collecting sensor information of the parking brake system and controlling electric actuators.

[0027] The frequency of use of the electric hydraulic pump 2 is reduced by using...

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PUM

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Abstract

The invention discloses a wire driven hydraulic parking braking system for a full-wheel steering electric-wheel car. The system comprises an electric hydraulic pump (2), an energy accumulator (4) and a pressure reducing valve (5) which are connected in sequence through a pipeline, wherein the pressure reducing valve (5) is connected with a parking braking valve (6) and a manual parking valve (7) through pipelines respectively, and the parking braking valve (6) and the manual parking valve (7) are connected with a traveling / parking switching valve (10) through pipelines respectively; the traveling / parking switching valve (10) is connected with wheel brakes (18) of a front wheel and a rear wheel through pipelines respectively. The system further comprises a parking braking switch (8) and a parking braking electronic control unit (9), wherein the parking braking switch (8) and the parking braking electronic control unit (9) are connected, and the parking braking electronic control unit (9) is used for acquiring sensor information and controlling electric execution components. A wire driven hydraulic parking scheme is adopted to be adapted to the characteristic of independent steering of wheels; parking pressure increase, parking pressure maintaining and parking pressure relief are controlled by the wire driven electromagnetic hydraulic valve, and response is quick; parking brake fluid pressure is generated through cooperation of the electric hydraulic pump, the energy accumulator and a pressure regulating valve, and braking force can be adjusted flexibly; by the adoption of the system, the ABS function and the ESP function can be integrated.

Description

technical field [0001] The invention relates to the field of hydraulic parking brakes for electric vehicles, in particular to a wire-controlled hydraulic parking brake system for electric vehicles with all-wheel steering, in which parking braking force is provided by an electrohydraulic unit. Background technique [0002] In order to enable the vehicle to safely stop on an inclined road surface with the aid of the parking brake, the parking brake device needs to be able to provide sufficient parking braking force through the wheels on one axle or all the wheels. In order to enable the vehicle brake to be used not only as a service brake but also as a parking brake, the parking brake device needs to take into account both the service brake and the parking brake of the vehicle brake. [0003] Each wheel of the all-wheel steering electric vehicle can be independently steered and driven, and has good dynamic control characteristics, which is a hot spot in the development of elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/171B60T11/24
CPCB60T8/171B60T11/24B60T2270/12
Inventor 杨勇严运兵许小伟王维强陈涛郑志阳沈琪钱能叶刚
Owner WUHAN UNIV OF SCI & TECH
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