Valve performance controller for internal combustion engine
US5803029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1997 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Sep 10, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/3442
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
There is disclosed a valve performance controller for an internal combustion engine. A camshaft is provided with a plurality of cams having different cam profiles. Changeover of the cams is performed through operation of a valve lift control mechanism. Also, a valve timing control mechanism is provided on the camshaft. The valve timing mechanism has a pulley, which is connected to a crankshaft of the engine via a timing belt. The pulley is connected to the camshaft via a ring gear. Through movement of the ring gear along the axis of the camshaft, the relative rotational phase between the pulley and the camshaft is changed. At least during cam changeover operation, oil is charged and retained within the hydraulic chamber located on both sides of the ring gear in the moving direction thereof. This structure reduces an impact which acts on the timing belt upon changeover of the cams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.