Engine decompression system
US7263960B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2006 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Feb 6, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02N3/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine decompression system that can secure a projecting height of a decompression cam from a base face of a valve operating cam to be relatively large in an engine starting rotational region, and maintain a state in which the projection height is decreased in a complete combustion rotational region of the engine. The decompression system includes a decompression cam shaft provided on a valve operating cam shaft or a rotating member integrally coupled thereto, the decompression cam shaft being capable of rotating between an operating position in which a decompression cam projects above a base face of a valve operating cam to slightly open engine valves during a compression stroke and a release position in which the decompression cam is withdrawn to allow the engine valves to close. A centrifugal mechanism connected to the decompression cam shaft maintains the decompression cam shaft at an operating position in a starting rotational region, and rotates the decompression cam shaft to the release position in a normal running region. The centrifugal mechanism is arranged so that, in a complete combustion rotational region between the starting rotational region and the normal running…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.