Invention Grant
- Patent Title: High-pressure fuel pump
-
Application No.: US17394968Application Date: 2021-08-05
-
Publication No.: US11808242B2Publication Date: 2023-11-07
- Inventor: Ziang Dong , Xiaoyan Jiang , Yingsa Huang
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot, Moore & Beck LLP
- Priority: CN 2010799987.3 2020.08.11
- Main IPC: F02M59/08
- IPC: F02M59/08 ; F02M59/12 ; F02M59/10 ; F04C2/344 ; F04C15/00 ; F04B23/08 ; F04B53/00 ; F04B53/16

Abstract:
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.
Information query