公开(公告)号：US4743179A

公开(公告)日：1988-05-10

申请号：US829082

申请日：1986-02-13

申请人： Peter Waas ,  Bernhard Matschull ,  Wolfgang Baeuml ,  Wolfgang Beck ,  Siegfried Piegsa

发明人： Peter Waas ,  Bernhard Matschull ,  Wolfgang Baeuml ,  Wolfgang Beck ,  Siegfried Piegsa

IPC分类号： F04B17/04 ,  F04B53/00 ,  F04B53/10 ,  F04B17/00

CPC分类号： F04B53/00 ,  F04B17/042 ,  F04B53/1032

摘要： A piston pump, in accordance with several embodiments, comprises a suction chamber into which fluid medium enters from an inlet line via a suction valve, beginning at the outset of a delivery stroke of the piston pump, without a build-up of intake negative pressure during the delivery stroke of the piston, and is particularly adapted to prevent vapor bubble formation. A reliable pump closure is ensured in the vicinity of the pump outlet, independent of the spring action of a return spring, which bears against the piston, in that any fluid medium entering the suction chamber of the pump contacts the piston in a direction producing reinforcement of the outlet closure pressure. In accordance with preferred embodiments, the piston may be a partially hollow or entirely hollow piston instead of a solid one. Variously designed connecting elements and relief valve arrangements for the conducting of the fluid medium from the suction chamber of the fuel pump to an armature compartment are provided, with the objective that the piston pump have a minimum inactive flow volume.

摘要翻译： 根据若干实施例的活塞泵包括吸入室，流体介质通过吸入阀从入口管路进入其中，从活塞泵的输送冲程开始，不产生进气负压 在活塞的输送冲程期间，特别适于防止气泡形成。 在泵出口附近确保可靠的泵关闭，而不管弹簧作用在弹簧作用下靠在活塞上，因为进入泵的吸入室的任何流体介质都沿着产生增强力的方向接触活塞 的出口闭合压力。 根据优选实施例，活塞可以是部分中空的或完全中空的活塞，而不是固体活塞。 提供了各种设计的连接元件和安全阀装置，用于将流体介质从燃料泵的吸入室传导到电枢室，目的是使活塞泵具有最小的不活动流量。