Servo brake for motor vehicle, has housing whose front end contacts master cylinder`s chamber so that adjusting effort of decompression piston is provided to disk when primary piston occupies its position before braking effort application

摘要

The servo brake has a master cylinder whose primary piston (54) includes a cylindrical housing (56). The piston (54) includes rear and front parts that slide in rear and front sections of the housing, respectively. A front end of the housing contacts with a primary chamber of the cylinder, such that adjusting effort of a decompression piston (52) is provided to a reaction disk when the piston (54) occupies its position before application of a braking effort.