The invention discloses a
servo brake cylinder used for a distributed composite
brake system, the distributed composite
brake system adopting the
servo brake cylinder and a brake method of the distributed composite brake
system adopting the
servo brake cylinder. The servo brake cylinder comprises a shell body, an electromotor, a coupler, a
ball screw assembly composed of a nut and a lead screw, abearing, a
retainer ring, a
piston, a cylinder body and a return spring, wherein an inner hole is formed in the center of the
piston, the inner hole comprises a tapered first
conical surface, a cylindrical surface and a gradually-expanded second
conical surface, the left end of the lead screw extends in the axial direction to sequentially form a tapered third
conical surface, a cylindrical surfaceand a gradually-expanded fourth conical surface, the first conical surface cooperates with the fourth conical surface to form an output valve, and the second conical surface cooperates with the thirdconical surface cooperate to form an input valve. According to the servo brake cylinder used for the distributed composite brake system, the distributed composite brake system adopting the servo brake cylinder and the brake method of the distributed composite brake system adopting the servo brake cylinder, the advantages of being compact in structure, flexible in control, high in braking response, high in braking
pressure control precision, reliable in failure protection capability, low in manufacturing cost and the like are achieved, so that an intelligent driving automobile is good in motion stability and high in reliability during braking.