Air pressure brake system for a vehicle

摘要

A vehicle air brake system including a deceleration sensing device having a piston cooperating with a lever carrying a magnetic roller for operating a reed switch. Movement of the piston depends upon the magnitude of the air pressure acting on it, and such pressure is proportional to the degree of brake energization. Movement of the piston moves the lever to vary the degree of deceleration required to move the roller for operating the reed switch. Operation of the reed switch operates an electro-magnetic valve to modulate the degree of braking force applied to the front and rear vehicle axles.