Damper assembly of high-pressure fuel pump

Patent metadata

Field	Value
Publication number	US-9803600-B2
Application number	US-201615093839-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 9, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

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 an upper body and a lower body that face each other in a vertical direction of the damper assembly, the upper body comprising a flange portion disposed along a circumference of the upper body, the lower body comprising a flange portion disposed along a circumference of the lower body;
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 disposed 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 of the damper assembly,
wherein the curved portion of the retainer ring is curved towards a center of the retainer ring from an end of the support portion, and is simultaneously welded with the flange portion of the upper body and the flange portion of the lower body.

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

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

4. The damper assembly of the high-pressure fuel pump of claim 1 , wherein the welding portions are disposed 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 disposed 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 comprises a plurality of through holes disposed along a circumferential surface of the support portion.

6. 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 that is configured to surround the damper and the retainer ring, and comprises:
side plates comprising an inner surface that is 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, and
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.

7. The damper assembly of the high-pressure fuel pump of claim 1 , wherein only the flange portion of the upper body, the flange portion of the lower body, and the curved portion are welded together.

Assignees

• Hyundai Kefico Corp

Inventors

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

Classifications

• 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

• F02M55/04

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

• F16L55/05

  Buffers therefor · CPC title