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2. 发明专利

GB2295423B Fuel injection pumps 未知
公开(公告)号：GB2295423B
公开(公告)日：1997-01-15
申请号：GB9523371
申请日：1995-11-16
申请人： BOSCH GMBH ROBERT
发明人： GUENTERT JOSEF , HUMMEL KARSTEN , KAMPA GUIDO , PAETZ AXEL , KOLAR KAREL
IPC分类号： F02M59/26
摘要： A fuel-injection pump for internal combustion engines, particularly an in-line injection pump for diesel engine, with a control bore in the pump cylinder and with an upper control edge for determining the start of feed and an oblique spill edge for determining the end of feed. The pump piston is rotated about its longitudinal axis in order to set the desired feed quantity, for the purpose of achieving a better regulating behavior of the system as a whole, comprising the fuel-injection pump, feed-quantity regulator and internal-combustion engine. The spill edge is subdivided, along its run over a part of the circumference of the pump piston, into portions with different angles of inclination ( alpha 1, alpha 2) to the axis of the pump piston. The control-edge portion having the large angle of inclination ( alpha 2) is located in the region of the pump piston which passes over the control bore during the pump-piston stroke in a rotary position of the pump piston for small feed quantities (lowered load range of the internal-combustion).

3. 发明专利

GB2295423A Fuel-injection pumps 未知
公开(公告)号：GB2295423A
公开(公告)日：1996-05-29
申请号：GB9523371
申请日：1995-11-16
申请人： BOSCH GMBH ROBERT
发明人： GUENTERT JOSEF , HUMMEL KARSTEN , KAMPA GUIDO , PAETZ AXEL , KOLAR KAREL
IPC分类号： F02M59/26
摘要： In a fuel injection pump, particularly an in-line pump for diesel engines, having a cylinder (12) with a control bore (18) and a piston (11) with upper and lower control edges (24, 23) which cooperate with the bore (18) to determine the start and end of fuel feed, for the purpose of achieving better regulation at small feed quantities, the spill edge (23) is subdivided into portions with different angles of inclination ( alpha 1, alpha 2) to the axis (29) of the piston (11). The portion (232) having the larger angle of inclination ( alpha 2) is located in the region of the piston (11) which passes over the bore (18) during the piston stroke in a rotary position of the piston (11) for small feed quantities (lower load range of the engine). The upper control edge (24) may have a partial circumferential groove which runs obliquely towards the end face of the piston in the region corresponding to low load. This has the added advantage of advancing injection at low loads.

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