A full hydraulic dual circuit dynamic braking system

A technology of dynamic braking and hydraulic circuit, applied in the direction of brakes, etc., can solve the problems of low utilization rate of ground adhesion coefficient, prolonging the braking distance of automobiles, and the braking effect needs to be improved, so as to achieve remarkable braking effect, reduce labor intensity, Effects that improve balance and stability

Active Publication Date: 2018-10-26
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the unbalanced braking force of the two front wheels has relatively little impact on the stability of the vehicle's driving direction, the resulting impact must be corrected through the driver's steering manipulation, and the braking effect also needs to be improved.
Two-channel and one-channel ABS are difficult to take into account in terms of directional stability, steering control and braking performance, and are rarely used at present.
[0004] In addition, the braking effect of the braking system on each wheel mainly depends on the load-sensing valve. The pressure distribution characteristics of the traditional load-sensing proportional valve and load-sensing pressure limiting valve are basically straight lines or broken lines. This distribution relationship cannot meet the ideal Due to the requirements of the braking force distribution characteristics of the brake, the utilization rate of the ground adhesion coefficient is low, so there is the main problem of poor braking efficiency, which prolongs the braking distance of the car and reduces the safety of driving

Method used

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  • A full hydraulic dual circuit dynamic braking system
  • A full hydraulic dual circuit dynamic braking system
  • A full hydraulic dual circuit dynamic braking system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 In the full hydraulic dual circuit braking system shown, the brake fluid from the fluid storage tank 2 is pressurized by the hydraulic pump 4 and then flows into the accumulator 5 for storage. When the driver depresses the brake pedal, the brake signal is transmitted For the brake valve 1, the oil inlet hole is connected to the oil outlet hole. Since the four brakes 8, 9, 10, and 11 of the car are connected to the oil outlet of the nonlinear load-sensing valve 2 in an X shape, the oil from the hydraulic pump 4 or the high-pressure oil of the accumulator 5 flows into the brake wheel cylinders of each wheel brake after passing through the pressure distribution of the nonlinear load-sensing valve 2, thereby braking the wheels. When the driver releases the brake pedal, the residual pressure oil in the brake line flows back to the liquid storage tank 3 through the oil return hole of the brake valve 1 . An accumulator 5 is provided therein, which can accumul...

Embodiment 2

[0036] Such as figure 2 As shown, it is the structure of a single circuit and brake valve in the full hydraulic double circuit brake system. The hydraulic pump 4 and the accumulator 5 communicate with the oil inlet hole of the brake valve 1 through the check valve 25 and the pipeline. The oil outlet of the dynamic valve 1 communicates with the pressure regulating chambers 26 and 27 of the front and rear wheel cylinders of the nonlinear load-sensing valve 2 respectively, and the oil return hole of the brake valve 1 communicates with the low-pressure pipeline. The pressure relief hole H on the rear wheel cylinder pressure regulating cavity 27 of the nonlinear load-sensing valve 2 communicates with the low-pressure pipeline through a throttle valve 28 . The load-sensing lever 29 indirectly senses the load change of the vehicle by receiving the relative displacement change signal between the vehicle chassis 30 and the nonlinear load-sensing valve 2 . When the driver does not ste...

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Abstract

The invention discloses a fully-hydraulic double-loop dynamic braking system. The fully-hydraulic double-loop dynamic braking system comprises hydraulic loops, a braking valve, a nonlinear load-sensing valve and a brake assembly, wherein the braking valve is connected with the brake assembly through the hydraulic loops and the nonlinear load-sensing valve sequentially; and two valve cavities of the nonlinear load-sensing valve are connected with four brakes in the brake assembly in the form of an X-shape. The brake braking-force distribution characteristics of the fully-hydraulic double-loop dynamic braking system disclosed by the invention are more similar to ideal brake braking-force distribution characteristics relative to the traditional pressure distribution valve, ideal brake braking-force distribution requirements can be better met, the braking efficiency of an automobile can be remarkably improved, and synchronous braking of front wheels and rear wheels can be realized to increase the utilization rate of the adhesion conditions of a road surface, improve the braking balance and stability of the wheels, and achieve a remarkable braking effect; and the double-loop braking system still has one half of a braking force in the case that the loop at one side is failed, and can meet the emergency braking requirements of the automobile.

Description

technical field [0001] The invention relates to a full-hydraulic dual-circuit dynamic braking system, which is suitable for the field of automobile hydraulic braking. Background technique [0002] Full-hydraulic dual-circuit dynamic braking system is a more commonly used braking system in the automobile market today. The braking system not only ensures that the car can achieve better braking performance and directional stability during braking, it is the most important system in the active safety system. The braking force of the shaft brake is distributed reasonably, which can not only achieve good braking performance, but also ensure better directional stability during braking. [0003] If the traditional automobile braking system is an anti-lock braking system (ABS), it mainly includes four types, namely four-channel type, three-channel type, two-channel type and one-channel type. Among them, the four-channel ABS has four wheels. In the pipeline leading to the four wheel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/17B60T8/1755
CPCB60T8/17B60T8/1755
Inventor 刘成晔刘旭孟继德
Owner JIANGSU UNIV OF TECH
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