Abstract: An auxiliary mechanism for an auto brake system, the mechanism includes a power cylinder, the interior of the power cylinder has a power piston and drive unit for pushing-up the power piston. A rectangular case body is joined to the rear end of the power cylinder and its interior has a rotational cam unit. An inductive unit including several on/off switches that are located on the power cylinder and a power box for driving said cam unit are provided. When oil pressure is transmitted into the power cylinder, the inductive unit will conduct the circuit and drive the cam unit to rotate for pushing-up the drive unit permitting the power piston to provide a boosting and pressure retaining function for each brake branch pump in order to achieve effective braking.

Abstract: The present invention provides a kind of pneumatic combined with hydraulic brake chamber, especially relating to a powerful hydraulic brake chamber which is highly stable, ready to provide high-pressure and high-speed actuation and easy to be assembled, dismantled and maintained powerful hydraulic. Said pneumatic type brake chamber is consisted of the following major parts:______________________________________ a cylinder body, a cylinder cover, a central shaft, a shaft sleeve, a piston, a helical spring, a connecting rod, a coupling device, and an alarm device, ect. ______________________________________in which, the pneumatic mechanism is constructed by said cylinder body, cylinder cover, shaft sleeve, piston and helical spring; the hydraulic mechanism is constructed by said central shaft, shaft sleeve, piston and helical spring; and the connecting mechanism is constructed by said connecting rod and the coupling device.