Brake control valve and commercial vehicle high-comfort hydraulic brake system

A braking control and braking system technology, applied in the direction of braking transmission, brakes, vehicle components, etc., can solve the problems of poor comfort experience, cab shaking, large cab pitch angle, etc., to improve the effect efficiency ratio , Improve the effect of wear conditions

Pending Publication Date: 2021-07-23
潍柴新能源商用车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The braking force factor of the whole vehicle acts on the front axle more, and the braking transfer inertia force acts more on the front suspension. The brake friction plate of the front axle carries more braking energy, and the front suspension Carrying a large amount of braking transfer torque, the wear of the brake pads will be more significant after absorbing more wear energy, and the front suspension will carry a large amount of torque, which will cause a large pitch angle of the cab and a relatively obvious cab shake. poor comfort experience

Method used

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  • Brake control valve and commercial vehicle high-comfort hydraulic brake system
  • Brake control valve and commercial vehicle high-comfort hydraulic brake system
  • Brake control valve and commercial vehicle high-comfort hydraulic brake system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment relates to a brake control valve installed in a dual circuit hydraulic brake system, such as Figure 1-3 shown. The control valve 3 has an input port 31 communicated with the master cylinder end of the front brake circuit and an output port 32 communicated with the brake end of the front brake circuit; between the input port 31 and the output port 32 A spool 33 is installed elastically in the valve chamber between them; one end of the spool 33 is a preload adjustment end 33-1, and the other end is a stop end 33-2, and the preload adjustment end is provided with an adjustment screw 34 and A return spring 33, the adjustment screw 34 is installed on the valve body in a spiral manner, one end of the return spring 33 is connected with the adjustment screw 34, and the other end is connected with the end of the valve core 33, by adjusting the adjustment screw 34 The screw degree can adjust the compression amount of the return spring 33, so that the valve core ...

Embodiment 2

[0046] This embodiment relates to a commercial vehicle high-comfort hydraulic brake system, such as Figure 4 shown. The braking system is mainly used to solve the following technical problems:

[0047] 1. When the hydraulic brake model is performing conventional braking, the response rate and braking strength of the front axle disc brake will be significantly ahead of the rear axle, which will make the pitch angle of the cab larger during braking and make the driver more comfortable. poor experience;

[0048] 2. The response of the front axle disc brake is obviously ahead of that of the rear axle, and the area of ​​the disc brake lining is smaller, so that the front axle disc brake lining wears significantly during conventional braking, and the replacement is frequent.

[0049] A high-comfort hydraulic brake system for a commercial vehicle in this embodiment includes: a master cylinder 2 controlled by a brake pedal 1, a disc brake configured on the front wheel of the vehicl...

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Abstract

The brake control valve is characterized in that a valve part is installed in a valve cavity in a pressed mode, a pre-pressing adjusting assembly is arranged at one end of the valve part, a stop pin is arranged at the other end of the valve part, and the valve part is provided with a through-flow channel capable of establishing or blocking communication between an input end and an output end; a pilot control channel is established between the input end and the stop end, a pilot electric control valve is arranged between the output end and the prepressing adjusting end, and the valve part is provided with a locking groove matched with a valve part of the pilot electric control valve. The brake system is characterized by comprising a main cylinder and a disc brake communicated with the main cylinder through a front brake loop, and a brake control valve is installed on the front brake loop. The front axle braking force factor in the early braking stage is improved by adjusting the initial starting pressure of the braking front axle, so that the effect efficiency ratio of the braking front axle and the braking rear axle is improved, the abrasion working condition of a front axle brake lining is finally improved, the pitching angle of a cab is reduced, and the comfort experience is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle brake systems, in particular to a brake control valve and a high-comfort hydraulic brake system for commercial vehicles. Background technique [0002] During the driving process of hydraulic brake models, especially the front axle adopts a disc brake structure. When the vehicle performs conventional braking operations, the cab is prone to a relatively significant pitch angle. The index of the pitch angle has a significant impact on the comfort of the driver. The strong influence also represents a driver's judgment on the stability of the vehicle. [0003] Hydraulic Brake Vehicle dual-circuit pipeline braking system is performing service braking, the front axle disc brake circuit requires a very small start-up hydraulic pressure when the brake pressure is built, and the rear axle drum brake circuit is building the brake pressure When the starting hydraulic pressure is large, the braking force of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/66B60T13/68
CPCB60T13/662B60T13/686
Inventor 宋建飞王宪雷邱建强徐有廷孙忠才
Owner 潍柴新能源商用车有限公司
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