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Air pressure booster control valve assembly and air pressure booster

A technology for controlling valve assemblies and boosters, applied in the field of hydraulic braking, which can solve problems such as poor adaptability, increased cost, and complex structure of the braking system, and achieve the effect of reducing production costs and simple structure

Active Publication Date: 2020-11-24
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing pneumatic booster has poor adaptability to different tonnage vehicles. Generally, it is necessary to adjust the booster air pressure value by setting a pressure limiting valve in the brake pipeline or changing the size of the pneumatic booster, resulting in a complex structure of the braking system. Increased size, increased cost

Method used

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  • Air pressure booster control valve assembly and air pressure booster
  • Air pressure booster control valve assembly and air pressure booster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, this embodiment provides a pneumatic booster control valve assembly, including a valve body 1 , a valve assembly 2 , an air intake seat 3 , a booster piston assembly 4 and a booster transmission assembly 5 .

[0043] The valve 21 includes a diaphragm 11 disposed therein. The partition 11 divides the inner chamber of the valve 21 into two chambers on either side thereof. An air inlet 111 is disposed on the partition 11 . The valve assembly 2 and the air intake seat 3 are respectively arranged on two sides of the partition 11 .

[0044] A high-pressure air cavity 10 is formed between the valve assembly 2 and the partition plate 11 . When the vehicle is in an unbraked state, high-pressure air enters the high-pressure air chamber 10 , and the valve assembly 2 blocks the air inlet 111 , and the valve assembly 2 is in a closed state to prevent the high-pressure air from entering the booster air chamber 20 .

[0045] The intake seat 3 is partiall...

Embodiment 2

[0061] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the power-assisted transmission assembly 5 includes a guide block 51 and a first spring 53 and a second spring 54 arranged inside and outside, that is, the first spring 53 and the second spring 54 arranged inside and outside are adopted. Spring 54 is used instead of rubber spring 52.

[0062] The guide block 51 is movably arranged in the air intake seat 3 . Both ends of the first spring 53 abut against the guide block 51 and the booster piston assembly 4 respectively. The second spring 54 is located between the guide block 51 and the booster piston assembly 4 .

[0063] When the vehicle is in an unbraked state, both ends of the first spring 53 abut against the guide block 51 and the piston 41 respectively. The first spring 53 presses the guide block 51 against the second stop ring 72 , and at this time the second spring 54 is in a free state, that is, the second spring 54 has ...

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PUM

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Abstract

The invention relates to the technical field of hydraulic braking, and discloses an air pressure booster control valve assembly and an air pressure booster. The control valve assembly comprises a valve body, a valve assembly, an air inlet seat, a power-assisted piston assembly, a power-assisted transmission assembly and a limiting assembly; the valve body comprises a partition plate arranged in the valve body; the valve assembly is arranged in the valve body and located on one side of the partition plate, a high-pressure air cavity is formed between the valve assembly and the partition plate,the valve assembly can block an air inlet hole; the air inlet seat is partially nested in the valve body and located on the other side of the partition plate; the power-assisted piston assembly is arranged in the valve body and located between the air inlet seat and the partition plate, a power-assisted air cavity is formed between the power-assisted piston assembly and the partition plate; the power-assisted transmission assembly is movably arranged in the air inlet seat and drives the power-assisted piston assembly to eject the valve assembly; and the limiting assembly is arranged between the air inlet seat and the power-assisted transmission assembly and used for limiting the maximum stroke of the power-assisted transmission assembly. The air pressure booster comprises the air pressurebooster control valve assembly. The limiting assembly limits the maximum stroke of the power-assisted transmission assembly, so that the maximum stroke of the power-assisted piston assembly is controlled, and the air pressure booster adapts to vehicle models of different tonnages.

Description

technical field [0001] The invention relates to the technical field of hydraulic braking, in particular to a control valve assembly of a pneumatic booster and a pneumatic booster. Background technique [0002] Pneumatic booster is a mechanism that uses compressed air as a power source to generate power in hydraulic brakes that use working oil as the transmission medium to improve braking efficiency and driving safety. [0003] The existing pneumatic booster has poor adaptability to different tonnage vehicles. Generally, it is necessary to adjust the booster air pressure value by setting a pressure limiting valve in the brake pipeline or changing the size of the pneumatic booster, resulting in a complex structure of the braking system. As size increases, cost increases. Contents of the invention [0004] The object of the present invention is to provide a pneumatic booster control valve assembly and a pneumatic booster, which can be adapted to vehicle models of different t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T15/36B60T13/24
CPCB60T15/36B60T13/24
Inventor 李同占封万程李林儒巨建辉
Owner FAW JIEFANG AUTOMOTIVE CO