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公开(公告)号:WO2014037155A1
公开(公告)日:2014-03-13
申请号:PCT/EP2013/065865
申请日:2013-07-29
Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L.
Inventor: WILLIAMS, Edward
CPC classification number: F02M63/0265 , F02D41/3845 , F02M59/06 , F02M59/102 , F02M59/366 , F02M63/027 , F04B9/042
Abstract: A fuel pump arrangement for a fuel injection system is described. The fuel pump arrangement comprises one or more cam-driven pump units (110a, 110b), and the or each pump unit (110a, 110b) comprises a pumping chamber (112a, 112b) and a pumping element (114a, 114b) for pressurising fuel in the pumping chamber (112a, 112b). The or each pumping element (114a, 114b) is driven by a respective cam (116a, 116b) of the fuel pump arrangement to undergo at least one pumping stroke per revolution of the cam (116a, 116b). The fuel pump arrangement is configured such that the fuel volume displaced in a first pumping stroke is greater than the fuel volume displaced in a second pumping stroke. In this way, the efficiency of operation of the fuel pump arrangement can be improved.
Abstract translation: 描述了一种用于燃料喷射系统的燃料泵装置。 燃料泵装置包括一个或多个凸轮驱动的泵单元(110a,110b),并且每个泵单元(110a,110b)包括泵送室(112a,112b)和泵送元件(114a,114b) 泵送室(112a,112b)中的燃料。 所述或每个泵送元件(114a,114b)由所述燃料泵装置的相应凸轮(116a,116b)驱动以经历所述凸轮(116a,116b)的每转至少一次泵送冲程。 燃料泵装置被配置成使得在第一泵送冲程中移动的燃料体积大于在第二泵送冲程中移动的燃料体积。 以这种方式,可以提高燃料泵装置的运转效率。