Fuel pump tappet/roller follower lubrication
US8397689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Jun 20, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M9/108
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cylinder head including a dam defining a reservoir surrounding the periphery of the fuel pump tappet/roller follower mounting hole is provided. The cylinder head includes a tappet/roller follower mounted in the tappet/roller follower mounting hole and in communication with a cam and a fuel pump. The fuel pump is located on the high side of the head and oil drainage occurs in a direction away from the mounting hole. The dam and reservoir are configured to retain lubricant in the mounting hole and the sliding interface between the mounting hole and the tappet/roller follower. The dam and reservoir are configured to retain a minimum level of oil in the mounting hole when the head is in vehicle position. A method is provided for retaining lubrication in the tappet/roller follower hole by forming a dam defining a reservoir in the head and passively providing lubricant to the tappet/roller follower hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.