Brake pedal application causes the primary push rod to open the atmospheric inlet valvThis exposes the area behind the diaphragms to atmospheric pressurThe resulting pressure differential provides the extra apply pressure for power assist.

• 踏下煞车踏板使主推杆打开空气进气阀。这样使膜片扣件后面的隔室暴露与于大气压力下。由此产生压力差为倍力式煞车器提供了额外压力。