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1. 发明授权

US5286178A Fuel injection pump for internal combustion engines 失效
标题翻译：内燃机燃油喷射泵
公开(公告)号：US5286178A
公开(公告)日：1994-02-15
申请号：US26796
申请日：1993-03-05
申请人： Wolfgang Schaef
发明人： Wolfgang Schaef
IPC分类号： F02M45/06 , F02M59/26 , F04B7/04
CPC分类号： F02M45/066
摘要： A fuel injection pump for internal combustion engines, having a pump piston that is guided axially and rotationally movably in a cylinder bore of a cylinder liner and that with a face end defines a pump work chamber. The fuel injection pump pumps a quantity of fuel that is divided into a preinjection quantity and a main injection quantity. On a jacket face, this pump piston has known oblique grooves for the high-pressure pumping diversion process, and also a recess, which cooperates with an annular groove in the cylinder bore and with a control opening which discharges into a low-pressure chamber, and on its end face the piston has a cutout formed by two different, deep shoulders; the cutout is recessed within the annular groove continuously and cooperates with a first control opening that discharges into the low-pressure chamber. During the high-pressure pumping phase, depending on the rotary position of the pump piston, the pump work chamber can be relieved via the annular groove, the recess, and the control opening; this interruption in high-pressure pumping can be limited to the partial-load or the full-load range, depending on the embodiment.
摘要翻译：一种用于内燃机的燃料喷射泵，其具有在气缸套的气缸孔中轴向和可旋转地引导的泵活塞，并且具有面端部的泵活塞限定了泵工作室。燃料喷射泵泵送分配成预喷射量和主喷射量的燃料量。在护套面上，该泵活塞具有用于高压泵送分流工艺的倾斜槽，以及与气缸孔中的环形槽配合并具有排放到低压室中的控制开口的凹部，并且在其端面上，活塞具有由两个不同的深肩部形成的切口; 切口连续地凹入环形槽内，并与排放到低压室中的第一控制开口配合。在高压泵送阶段期间，根据泵活塞的旋转位置，泵工作室可以通过环形槽，凹槽和控制开口释放; 根据实施例，高压泵送中的这种中断可以局限于部分负载或全负载范围。

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