METHOD AND DEVICE FOR VARYING THE SUPPLY PRESSURE

专利名称：METHOD AND DEVICE FOR VARYING THE

SUPPLY PRESSURE APPLIED TO A HIGHPRESSURE PUMP AND GENERATED BY ALOW PRESSURE PUMP

发明人：JOOS, KLAUS,WOLBER, JENS,FRENZ,

THOMAS,BOCHUM, HANSJOERG,AMLER,MARKUS

申请号：EP00972629.0申请日：20001011公开号：EP1228304B1公开日：20050427

摘要：The invention relates to a method and a device for varying a supply pressure(p_soll) applied to a high pressure pump (3) and generated by a low pressure pump (2),whereby said low pressure pump (2) and said high pressure pump (3) supply fuel to aninternal combustion engine (1). In the inventive method the following steps are disclosed:determination of the current temperature (T_Krst) of the fuel in the high pressure pump(3); calculating the lowest possible supply pressure (p_soll), depending upon the fueltemperature (T_Krst), that would reliably avoid any fuel vaporisation in the high pressurepump (3); controlling or regulating the low pressure pump (2) in such a way as to maintainthe calculated supply pressure (p_soll); whereby the supply pressure (p_soll) is kept aslow as possible to relieve the low pressure pump (2) and the supply pressure is kept highenough to reliably avoid vaporisation of fuel in the high pressure pump (3). The method ispreferably carried out using physical models of the high pressure pump (3).

申请人：ROBERT BOSCH GMBH,BOSCH GMBH ROBERT,ROBERT BOSCH GMBH

地址：DE

国籍：DE

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