High pressure fuel pump having improved lubrication characteristics

Patent metadata

Field	Value
Publication number	US-9200626-B2
Application number	US-201213707021-A
Country	US
Kind code	B2
Filing date	Dec 6, 2012
Priority date	Sep 5, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A high pressure fuel pump with improved lubrication characteristics includes a plunger configured to pressurize fuel supplied to a high pressure chamber formed within a housing at a high pressure to discharge the fuel while being lifted and dropped in the high pressure chamber within the housing, a tappet body configured to support a lower end of the plunger, a cam configured to lift and drop the plunger while rotating, and a roller configured to be installed in a roller shoe pressed in a lower portion of the tappet body and rotate in a state of being in contact with the cam, the fuel supplied to the high pressure chamber passes the roller shoe through at least one lubrication passage and is supplied to a contact area between the roller and the cam or a contact area between the roller shoe and the roller.

First claim

What is claimed is:

1. A high pressure fuel pump having improved lubrication characteristics, comprising:
a plunger to pressurize fuel supplied to a high pressure chamber formed within a housing at a high pressure to discharge the fuel while being lifted and dropped in the high pressure chamber within the housing;
a tappet body supporting a lower end of the plunger;
a cam to lift and drop the plunger while rotating; and
a roller installed in a roller shoe pressed in a lower…

Assignees

• Hyundai Motor Co Ltd

Inventors

• Park Yongsoon

Classifications

• F04B53/18

  Mechanical Engineering · mapped topic

• F02M59/102

  Mechanical Engineering · mapped topic

• F04B1/0426

  Mechanical Engineering · mapped topic

• F04B17/05 Primary

  Mechanical Engineering · mapped topic

• F02M2200/02

  Mechanical Engineering · mapped topic