Electronic brakeforce distribution (EBD) valve

Abstract

The invention relates to an electronic brakeforce distribution (EBD) valve. The EBD valve comprises a shell, a compression spring, a diaphragm assembly, a valve rod, a valve door and a valve door spring, wherein the compression spring, the diaphragm assembly, the valve rod, the valve door and the valve door spring are sequentially installed in an inner cavity of the shell. The diaphragm assembly and the valve rod are fixedly connected. The valve rod is in movable contact with the valve door. The diaphragm assembly, the valve rod and the valve door partition the inner cavity of the shell into a spring chamber, a pressure regulating chamber, a rear valve chamber and a front valve chamber in sequence. The spring chamber, the pressure regulating chamber and the rear valve chamber do not communicate with one another. The valve door controls the communication and partition of the rear valve chamber and the front valve chamber. An air pressure source is fed outside the front valve chamber. The shell is provided with an air outlet connector communicating with the rear valve chamber, a rear valve channel communicating with the pressure regulating chamber and a front valve channel communicating with the front valve chamber or the rear valve chamber. A relay solenoid valve is connected between the front valve channel and the rear valve channel in series, is controlled by an ECU system and controls the communication or partition of the front valve channel and the rear valve channel. The EBD valve is applied to a relay valve to enable the relay valve to have an EBD function.

Description

technical field [0001] The invention relates to the technical field of automobile braking, and the specific technology is an EBD electronic valve, which belongs to the auxiliary device of a relay valve. Background technique [0002] EBD (Electronic Brakeforce Distribution), that is, electronic brake force distribution, is an auxiliary function of ABS. It is to add a control software to the control computer of ABS. The mechanical system is exactly the same as that of ABS. It is only an effective supplement to the ABS system, and it is generally used in combination with ABS to improve the efficacy of ABS. When emergency braking occurs, EBD can automatically compare the sliding rate of the rear tires based on the weight of the vehicle body and road conditions before the action of the ABS. If it is found that the difference must be adjusted, the braking system will Adjust the wheelside braking torque of the rear wheels to obtain a more balanced and closer to ideal braking force...

AI Technical Summary

Problems solved by technology

The disadvantage is that the relay valve cannot maintain the controllability of the vehicle when the solenoid valve fails or fails

At the same time, the above-mentioned ABS emergency relay valve has a single function and has not fully realized the perfect combination of ABS and mechanical relay valve, especially without integrating the EBD function

[0005] In order to achieve EBD performance, the designer of the existing ABS combination valve that includes EBD often uses the EBD valve as an anti-locking function. The problem caused by this design is: EBD and ABS interfere with each other when they work at the same time

Images