Automobile vacuum booster with emergency auxiliary braking function

Abstract

The invention discloses an automobile vacuum booster with an emergency auxiliary braking function. The automobile vacuum booster comprises a piston body, a front housing, a rear housing, a coating, a main cylinder push rod and a return spring, wherein the front end of the exterior of the piston body is connected with the coating; the front housing and the rear housing are spaced by the coating to form a vacuum cavity and an atmospheric cavity; a control valve seat assembly comprising a control valve seat and a push rod is arranged on a vacuum valve seat at the rear end in the piston body; the main cylinder push rod is arranged at the front end of a rubber feedback disc; the front end of the main cylinder push rod is inserted into a hydraulic main cylinder piston; a push rod baffle is sleeved to the exterior of the main cylinder push rod; the return spring is arranged in the vacuum cavity and connected with the front housing and the push rod baffle; a limiting hole is formed in the side surface of the middle of the piston body; a locking sheet penetrates through the limiting hole and is clamped in a clamping groove in the small end of the control valve seat; and a control mechanism is mounted in a big hole in the piston body between the end surface of the small end of the control valve seat and the rubber feedback disc. The emergency auxiliary braking function of the automobile vacuum booster is achieved by the spring and ball parts, so that the automobile vacuum booster is long in service life, simple and mature in processing technology, convenient to mount and low in cost.

Description

technical field [0001] The invention relates to an automobile brake booster, in particular to an automobile vacuum booster with emergency auxiliary braking function. Background technique [0002] Vacuum booster is a key component of automobile braking system and the guarantee of automobile safety. The working principle of the traditional vacuum booster is to use the vacuum generated by the automobile engine or vacuum pump to increase the thrust acting on the brake master cylinder with the help of the pressure difference between the front and rear two different working chamber membranes to achieve the vacuum boosting effect. [0003] There is an obvious shortcoming in the braking of the traditional conventional automobile vacuum booster, that is, in the event of emergency braking, the brake pedal force is often insufficient, resulting in insufficient opening of the atmospheric valve, insufficient air intake, and front and rear working chambers. If the pressure difference is ...

AI Technical Summary

Problems solved by technology

[0003] There is an obvious shortcoming in the braking of the traditional conventional automobile vacuum booster, that is, in the event of an emergency braking, the brake pedal force is often insufficient, resulting in insufficient opening of the atmospheric valve, insufficient air intake, and the front and rear working chambers. The pressure difference is small, the braking response time is too long, and the braking distance is too long, which poses a great hidden danger to the safety of the car.

[0004] Aiming at the shortcoming of conventional automotive vacuum boosters when braking, existing automotive vacuum booster auxiliary braking systems such as patent publication number 202016460 U and patent 201882070 U have solved this problem, but both have high cost and long service life. Shortcomings and poor reliability

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