As you improve safety and you fill up the brake fluid the boost type brake gear

摘要

(57) Abstract This invention on the one hand in, receiving Drive power, it makes increase the pressure inside main fluid circuit (i) has reached the point where as it has the main piston (30) which, receiving the fluid pressure inside main fluid circuit (i), makes increase the pressure inside sub- fluid circuit (ii) has the sub- piston (31) which the master cylinder (200) which and, on the other hand in, adding entry by being controlled, in the main piston (30) can show Drive power to include with the pneumatics booster (100) which, the main piston (30) itself of the master cylinder (200), the master cylinderTo include the hollow operational cylinder (32) which is communicated to main fluid circuit (i), inside this operational cylinder, the reaction piston (34) with sealing feature sleeve to axis direction, the 1st resilient means (46) directing the reaction piston (34) to the master cylinder (200) with the reaction piston (34) and the operational cylinder, (32) the pushing the 1st elastic power which overpowers is shown, one aperture (36) is formed by the operational cylinder (32) at least and has reached the point where it communicates inside (35) this operational cylinder to main fluid circuit (i)It regards the boost type brake equipment for the automobile. According to this invention, the operational cylinder (32) includes the reaction piece (76), destal amount (58) of the reaction piston (34) in order to show the power which is proportionate to the power which it occurs with the fluid pressure inside sub- fluid circuit (ii) in the sub- piston (31) it is shown in case of the breakdown main fluid circuit (i) in the aforementioned reaction piece, this connection is possible vis-a-vis this reaction piece.