Valve timing regulation apparatus for engine
US5870983A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Jun 18, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2001/34483
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
For enhancing engine startability and reducing discharge of unburned fuel from an engine, a camshaft is rotated toward the most advance side when an exhaust valve is opened. In one aspect, the camshaft is urged toward the advance side with respect to a timing pulley by the urging force of a spring. A stopper is received displaceably in a diametrical direction in a receiving hole and is fitted in a stopper hole when the camshaft is at the most advance position. In another aspect, at engine starting where operating fluid is not supplied to a release fluid chamber, a clutch piston is coupled to a front plate by a spring, and gear teeth of the front plate and the clutch piston are engaged with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.