Pump unit, particularly for supplying pressure to brake actuating device of motor vehicle brake system, has pneumatic brake booster, particularly vacuum brake booster, where pump is driven by drive unit or motor

摘要

The pump unit (1) has a pneumatic brake booster, particularly a vacuum brake booster, where a pump (2) is driven by a drive unit or motor (3). A working membrane (4) is provided, which acts on an upward stroke direction, where an eccentric cam (17) is driven by the drive unit. The working membrane is firmly connected with a spring retainer (20).