Title:
エンジンのデコンプ装置
Document Type and Number:
Japanese Patent JP4490846
Kind Code:
B2
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cam to slightly open engine valves during a compression stroke and a release position in which the decompression cam is withdrawn to allow the engine valves to close.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 region, the decompression cam shaft is maintained at a middle position at which the projection height of the decompression cam is less than the projection height at the operating position. The centrifugal mechanism comprises two weights and a return spring to allow at least three equilibrium positions of the decompression system corresponding to the operating, middle and released position.
Inventors:
Shigeru Saito
Taku Suzuki
Hiroshi Moriyama
Taku Suzuki
Hiroshi Moriyama
Application Number:
JP2005044078A
Publication Date:
June 30, 2010
Filing Date:
February 21, 2005
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F01L13/08; F02D13/08; F02N19/00
Domestic Patent References:
| JP63131810A | ||||
| JP2092048U | ||||
| JP10159524A |
Attorney, Agent or Firm:
Ken Ochiai
Kazuaki Niki
Kazuaki Niki