Pedal feel simulator and an assembly process thereof

摘要

A pedal feel simulator (PFS) for automotive braking systems, e.g. a brake-by-wire (BBW) system and an assembly process for the simulator. The stroke simulator comprises a housing 7 with a bore b in which is located a piston 6 (labelled 4 in description) with an end subject to hydraulic pressure, e.g. from a master cylinder of the braking system. The simulator also includes a rubber spring 2, a steel spring 4 (labelled 6 in description), a closing cover 1, a pressure piece 3 and a plug 8. The steel spring 4 is retained between the pressure piece 3 and the piston 6 by the plug 8, which is inserted into the piston. The pressure piece is located between the steel spring 4 and rubber spring 2. The piston and plug may be tightly connected, e.g. by clamping, a press fit connection, laser brazing or ultrasonic plastic welding. The steel spring, pressure piece and piston form a sub-assembly which is connected together before placing in the bore in order for the spring to remain the same length throughout assembly.