Electronic rear axle brake valve

Abstract

The invention discloses an electronic rear axle braking valve, which is composed of a housing of the braking valve, an upper cover arranged on the housing and an electrical control box arranged on the upper cover. There is a piston between the upper cover and the shell, and a valve. There is an exhaust port under the valve, and an air inlet port and an air outlet port are provided on the side of the shell; A control cavity is provided between the piston and the upper cover, and a control interface is provided on the outside of the upper cover. The control interface communicates with the control cavity, and a control cavity is also provided between the upper cover, the piston and the housing. There is an electromagnetic air valve on the outside of the housing, and the air inlet and outlet holes of the electromagnetic air valve communicate with the air outlet cavity and the control cavity respectively; the electronic control box of the electrical appliance is equipped with a single-chip electronic control box and an air pressure sensor control box, and a single-chip microcomputer is installed in the box. An electronic control circuit and an air pressure sensor control circuit; a single chip microcomputer, a voltage regulator, a first comparator, and a second comparator are arranged in the single-chip microcomputer control box; an air pressure sensor is arranged in the air pressure sensor control box, and the control circuit is connected to the underside of the automobile frame load-sensing switch. The invention is applicable to large passenger cars, large trucks and trailers.

Description

technical field [0001] The invention relates to an automobile rear axle braking valve, in particular to an electronic rear axle braking valve. Background technique [0002] The rear axle brake valve belongs to a type of valve used to control the rear axle brake of an air-braked automobile. The invention relates to a rear axle brake valve, which is used to control the rear axle brake of an air-braked automobile, especially when the vehicle body is long. , Freight vehicles with large load capacity, large passenger vehicles, etc. The rear axle of the above-mentioned vehicle is relatively far away from the front of the car, and the pipeline for controlling the braking of the rear axle is relatively long, and the rear wheels will obviously lag behind the front wheels during braking. Most of the prior art of these vehicle rear axle brakes adopts relay valve to control the front and rear axle brakes for this reason, and what is placed on the front axle is the front axle relay valv...

AI Technical Summary

Problems solved by technology

[0003] Although the synchronous relay valve can speed up the braking of the rear wheels, the rear axle is obviously slower than the front axle when the brake is released, which will cause serious lagging of the rear wheels

The brake shoe of the rear wheel wears quickly, the brake drum is prone to heat and wear, and the speed increase is slow after braking

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