Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VALVE GEAR FOR ENGINE
Document Type and Number:
WIPO Patent Application WO/2011/043301
Kind Code:
A1
Abstract:
A valve gear for an engine includes: a camshaft which is supported by the cylinder head of the engine and on which cams having different valve lift characteristics are formed at predetermined intervals (pitches); a rocker shaft which is supported by the cylinder head so as to be parallel to the camshaft; and rocker arms which are rockably supported by the rocker shaft. A rocker arm is provided between one of cams and an intake valve or an exhaust valve and is configured to be movable in the direction of the axis of the rocker shaft, and the presser of the rocker arm which presses the intake valve or the exhaust valve extends in the axis direction by a length greater than each interval (pitch) of the cams. The valve gear includes a drive device for moving the rocker arms in one or the other direction along the axis by the interval at which the cams are formed.

Inventors:
KAMICHIKA, Takurou (2500 Shingai Iwata-sh, Shizuoka 01, 〒4388501, JP)
Application Number:
JP2010/067380
Publication Date:
April 14, 2011
Filing Date:
October 04, 2010
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA (2500 Shingai, Iwata-shi Shizuoka, 01, 〒4388501, JP)
ヤマハ発動機株式会社 (〒01 静岡県磐田市新貝2500番地 Shizuoka, 〒4388501, JP)
International Classes:
F01L13/00; F01L1/04; F01L1/18
Foreign References:
JP2001020710A
JP3365805B2
JPS63154437A
JPH0243004A
JP3365805B2
JP2006520869A
JP2009232203A
Other References:
See also references of EP 2487341A1
Attorney, Agent or Firm:
INAOKA, Kosaku et al. (Sun Mullion NBF Tower 21st Floor, 6-12, Minamihommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 54, 〒5410054, JP)
Download PDF: