公开(公告)号：US10788025B2

公开(公告)日：2020-09-29

申请号：US15464766

申请日：2017-03-21

申请人： DENSO CORPORATION

发明人： Michihisa Ishikura ,  Seiji Kunihiro

IPC分类号： F04B9/04 ,  F04B1/066 ,  F04B1/0413 ,  F04B1/06 ,  F02M59/10 ,  F02M59/02 ,  F04B53/14 ,  F02D41/38

摘要： A fuel pump includes a cylinder that forms a compression chamber which pressurizes a fuel, a plunger that compresses the fuel in the compression chamber, a cam that pushes the plunger, and a driven gear that engages a driving gear to transmit a rotational driving force. A profile of the cam is configured such that a peak arrival range is half or less of a compression range. Cam speed is obtained by differentiating a lift amount of the plunger by a rotation angle of the cam, the compression range is an angle range during which the plunger is pushed in the direction of compressing the fuel, and the peak arrival range is an angle range from a start of the compression range until a most retarded position of a peak of the cam speed.