Damper assembly of high-pressure fuel pump

Patent metadata

Field	Value
Publication number	US-2016298581-A1
Application number	US-201615093839-A
Country	US
Kind code	A1
Filing date	Apr 8, 2016
Priority date	Apr 9, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

A damper assembly of a high-pressure fuel pump for reducing fuel pulsation, which is capable of reducing the pulsation of a fuel transferred to the high-pressure fuel pump to stabilize the supply of the fuel, having a simplified structure to minimize an installation space and curtailing manufacturing costs, is provided. The damper assembly of the high-pressure fuel pump includes a damper including upper and lower bodies having flange portions formed along a circumference thereof to face each other in a vertical direction, a retainer ring including a curved portion configured to support the damper and a support portion extending from the curved portion in a longitudinal direction, and a cover member configured to surround the damper and the retainer ring. Here, the damper is fixed in a housing as the flange portion of the upper body, the flange portion of the lower body and the curved portion of the retainer ring are welded at welding portions at the same time.

First claim

What is claimed is:

1 . A damper assembly of a high-pressure fuel pump for reducing fuel pulsation, the damper assembly comprising:
a damper comprising upper and lower bodies having flange portions formed along a circumference thereof to face each other in a vertical direction; a retainer ring comprising a curved portion configured to support the damper and a support portion extending from the curved portion in a longitudinal direction; and a cover member configured to surround the damper and the retainer ring, wherein welding portions are simultaneously formed between the flange portion of the upper body and the flange portion of the lower body and between the flange portion of the lower body and the curved portion of the retainer ring to fix the damper in a housing.

2 . The damper assembly of the high-pressure fuel pump of claim 1 , wherein the upper body has a fluctuation portion arranged in a concentric shape on an upper surface thereof.

3 . The damper assembly of the high-pressure fuel pump of claim 1 , wherein the lower body has a fluctuation portion arranged in a concentric shape on a lower surface thereof.

4 . The damper assembly of the high-pressure fuel pump of claim 1 , wherein the welding portions are formed at the flange portion of the upper body, the flange portion of the lower body and the curved portion of the retainer ring to be lined up in a band shape or formed to be spaced at intervals in a spot shape.

5 . The damper assembly of the high-pressure fuel pump of claim 1 , wherein the support portion has a plurality of through holes formed along a circumferential surface thereof.

6 . The damper assembly of the high-pressure fuel pump of claim 1 , wherein the cover member comprises:
side plates having an inner surface coming in contact with an outer surface of the retainer ring; and an upper plate coupled between the side plates, wherein the upper plate is spaced from an upper surface of the damper.

Assignees

• Hyundai Kefico Corp

Inventors

• Nah Eun Woo
• Lee Sung Ho
• Han Kyung Chul
• Hong Chun Ky

Classifications

• F02M55/04

  Means for damping vibrations {or pressure fluctuations} in injection pump inlets {or outlets} · CPC title

• F02M37/0041 Primary

  Means for damping pressure pulsations (equalisation of pulses in positive displacement pumps F04B1/00; devices for damping fluid pulsations in pipes F16L55/04) · CPC title

• F16L55/05

  Buffers therefor · CPC title