Variable valve timing rocker arm arrangement for internal combustion engine
US5085182A · kind A · utility
27Cited by
7References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 25, 1990 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Sep 25, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/185
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A main rocker arm which is pivotally mounted on a rocker shaft has one or more sub-rocker arms pivotally mounted thereon. The main rocker arm is arranged to synchronously open and close two poppet valves. Each of the sub-rocker arms can be selectively locked to the main one by way of hydraulically operated plunger arrangements. The main rocker arm is provided with a roller type cam follower which follows a low speed cam. The sub-rocker arms are provided with followers which engage high or very high speed cams. Lost motion springs which maintain the sub-rocker arms in contact with the cams are mounted on the main rocker arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.