Title:
VARIABLE VALVE DRIVE DEVICE, ENGINE, AND TWO-WHEELED MOTOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2006/038370
Kind Code:
A1
Abstract:
A cam sprocket (211) is rotatingly driven by drive force transmitted from a crankshaft (130). An eccentric plate (250) is rotated, by the rotation of the cam sprocket (211), about a shaft in the same direction as the rotating shaft of the cam sprocket (211), and the shaft of the eccentric plate is moved, by a control section (150) through an eccentric boss (260), from the position of the axis of the rotating shaft to an eccentric position. When the eccentric plate (250) is rotated at the eccentric position, a rotational phase difference, relative to the cam sprocket (211), of a variable camshaft (230) and a suction cam piece (240) is periodically varied. At the maximum speed or at a speed near the maximum speed of the crankshaft (130), the control section (150) causes the position of the shaft of the eccentric plate (250) to be aligned with the position of the axis of the rotating shaft.
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Inventors:
TSUCHIDA NAOKI (JP)
Application Number:
PCT/JP2005/014089
Publication Date:
April 13, 2006
Filing Date:
August 02, 2005
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD (JP)
TSUCHIDA NAOKI (JP)
TSUCHIDA NAOKI (JP)
International Classes:
F01L13/00; F02D13/02
Foreign References:
| JPH10169420A | 1998-06-23 | |||
| JPH09203306A | 1997-08-05 | |||
| JPH0571317A | 1993-03-23 | |||
| JPH0663804U | 1994-09-09 | |||
| JPH10205310A | 1998-08-04 |
Attorney, Agent or Firm:
AMAGI INTERNATIONAL PATENT LAW OFFICE (580 Horikawa-cho, Saiwai-k, Kawasaki-shi Kanagawa 13, JP)
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