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Title:
VALVE GEAR FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2010/052769
Kind Code:
A1
Abstract:
A valve gear mechanism for an internal combustion engine, capable of changing valve-opening characteristics of a valve. The mechanism can smoothly change valve-opening characteristics by using a simplified structure without causing an increase in the number of parts and without causing an increase in sliding friction. A valve gear has a switching mechanism (24) for switching connection and disconnection between rocker arms (32, 34) arranged between a valve (18) and cams (14, 16). When a slide pin (58) reaches an displacement end (Pmax2) in the direction in which a slide pin (58) is retracted, the urging force of a return spring (56) acting on switching pins (48, 54L, 54R) is received by an engaging portion, formed between a notch (58e) provided in the slide pin (58) and a rock pin (70), with the engaging portion separated from a camshaft (12).

Inventors:
EZAKI SHUICHI (JP)
NISHIKIORI TAKASHI (JP)
KIDOOKA AKIO (JP)
Application Number:
PCT/JP2008/070123
Publication Date:
May 14, 2010
Filing Date:
November 05, 2008
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
EZAKI SHUICHI (JP)
NISHIKIORI TAKASHI (JP)
KIDOOKA AKIO (JP)
International Classes:
F01L13/00
Foreign References:
JP2003293714A2003-10-15
JPS62184118U1987-11-21
JPH108928A1998-01-13
JPS6193217A1986-05-12
JP2005042717A2005-02-17
JP2006316664A2006-11-24
JP2000008819A2000-01-11
Attorney, Agent or Firm:
TAKAHASHI, Hideki et al. (JP)
Hideki Takahashi (JP)
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