Variable valve timing arrangement with automatic valve clearance adjustment
US4438736A · kind A · utility
25Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Mar 9, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/462
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable valve timing system has a lever pivoted at one end on a piston reciprocally disposed in a cylinder and the other end in engagement with a poppet valve. A first cam cooperates with a second bell crank lever like cam which is eccentrically mounted on a rotatable shaft. Rotation of this shaft moves the second cam toward or away from the engine proper to vary the movement of the lever with which the second cam cooperates. The piston is biased out of the cylinder by a spring and maintained in position by hydraulic fluid introduced into the cylinder through a one way flow arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.