Mechanical oil filtration in an I.C. engine valve lifter
US6439186B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2001 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2305/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A mechanical oil filtration and oil flow re-direction system for a hydraulically actuated valve lifter. Pressurized oil is directed to the lifter through a series of controlled clearance passages prior to gaining access to the internal cavity of the lifter. Once inside the lifter, the oil is deflected off of an insert that directs the oil towards the upper end of the lifter and the push rod seat. The oil flow is then directed downwards into an oil deflector supply hole and into the internal cavity of the lifter and the chamber containing the lifter check ball and seat. In use, the system restricts particulates from the lifter, and re-directs particulates that do access the lifter to pre-determined locations within the lifter to minimize operational impairment of the lifter from particulate contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.