Title:
VARIABLE VALVE DRIVE DEVICE, ENGINE, AND MOTORCYCLE
Document Type and Number:
WIPO Patent Application WO/2006/030587
Kind Code:
A1
Abstract:
A variable valve drive device, an engine, and a motorcycle. In the variable valve drive device, a cam sprocket (211) is rotated by a drive force transmitted from a crankshaft (130) to rotate an eccentric plate (250) on an axis parallel with the rotating axis of the cam sprocket (211). The eccentric plate (250) is movable from the axis position to the eccentric position of the cam sprocket (211), and rotated at the eccentric position to rotatingly drive an intake cam block (240) through a variable camshaft (230) at the cyclically varying rotating phase difference thereof from the cam sprocket (211). The intake cam block (240) drives an intake valve. The phase angle of the connected portions of the eccentric plate (250) to the cam sprocket (211) and the movable camshaft (230) to the axis of the eccentric plate (250) is 80 to 160° or 200 to 290° when the rotating direction of the eccentric plate (250) is forward.
Inventors:
TSUCHIDA NAOKI (JP)
MORIKAWA TAKESHI (JP)
MORIKAWA TAKESHI (JP)
Application Number:
PCT/JP2005/014087
Publication Date:
March 23, 2006
Filing Date:
August 02, 2005
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD (JP)
TSUCHIDA NAOKI (JP)
MORIKAWA TAKESHI (JP)
TSUCHIDA NAOKI (JP)
MORIKAWA TAKESHI (JP)
International Classes:
F01L13/00; F01L1/34
Foreign References:
| JPH0116413A | ||||
| JPH1113437A | 1999-01-19 | |||
| JP2001263186A | 2001-09-26 | |||
| JPH08277937A | 1996-10-22 | |||
| JPH08338212A | 1996-12-24 | |||
| JPH09203306A | 1997-08-05 | |||
| JP2703595B2 | 1998-01-26 |
Other References:
See also references of EP 1795718A4
Attorney, Agent or Firm:
AMAGI INTERNATIONAL PATENT LAW OFFICE (580 Horikawa-cho, Saiwai-k, Kawasaki-shi Kanagawa 13, JP)
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