公开(公告)号：US11808242B2

公开(公告)日：2023-11-07

申请号：US17394968

申请日：2021-08-05

申请人： Robert Bosch GmbH

发明人： Ziang Dong ,  Xiaoyan Jiang ,  Yingsa Huang

IPC分类号： F02M59/08 ,  F02M59/12 ,  F02M59/10 ,  F04C2/344 ,  F04C15/00 ,  F04B23/08 ,  F04B53/00 ,  F04B53/16

CPC分类号： F02M59/08 ,  F02M59/102 ,  F02M59/12 ,  F04B23/08 ,  F04B53/006 ,  F04B53/16 ,  F04C2/3446 ,  F04C15/0061 ,  F04C2210/1044 ,  F04C2240/10 ,  F04C2240/20

摘要： A high-pressure fuel pump includes a drive shaft, and a vane pump and a plunger pump which are driven by the drive shaft. The vane pump is configured to supply pre-pressurized fuel to the plunger pump. The drive shaft includes a cam configured to drive a piston rod of the plunger pump such that the plunger pump alternately executes a fuel suction stroke and a fuel discharge stroke. The drive shaft further includes a shaft portion for driving a rotor of the vane pump. The vane pump is configured such that for each fuel suction stroke of the plunger pump the vane pump provides a fuel supply cycle that is advanced by a phase angle relative to the fuel suction stroke.