Fuel injection pump for internal combustion engine

专利名称：Fuel injection pump for internal combustion

engines

发明人：Helmut Laufer,Helmut Pfeifle,Max Straubel申请号：US06/595189申请日：19840330公开号：US04535742A公开日：19850820

摘要：A fuel injection pump for internal combustion engines, in which beyond apredetermined remnant stroke during the supply stroke of the pump piston a reliefconduit is opened via a first control edge and the remaining fuel pumped by the pumppiston is pumped into a reservoir connected there. During the subsequent intake stroke,the diverted fuel is pumped back into the pump work chamber of the pump piston, untilthe first control edge again closes the relief conduit. During the subsequent intakestroke of the pump piston, in particular at the bottom dead center position of the pumppiston, the relief conduit to the reservoir is once again opened by a second control edge,and then a complete relief of the reservoir is attained. It is during this phase that themetering of the fuel to be injected during the next supply stroke of the pump piston alsotakes place, via a magnetic valve. With an apparatus of this kind, it is advantageous thatthe fuel quantity per supply stroke of the pump piston that is actually to be injected canbe metered exactly by means of a magnetic valve under pressure conditions that remainconstant despite variable opening times.

申请人：ROBERT BOSCH GMBH

代理人：Edwin E. Greigg

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