| US 7,584,730 B2 | ||
| Valve train device for engine | ||
| Hideo Fujita, Shizuoka-ken (Japan); and Koichi Hatamura, Hiroshima (Japan) | ||
| Assigned to Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-ken (Japan) | ||
| Filed on Jan. 29, 2007, as Appl. No. 11/668,401. | ||
| Application 11/668401 is a continuation of application No. 11/263573, granted, now 7,168,403, previously published as PCT/JP2004/006426, filed on May 06, 2004. | ||
| Claims priority of application No. 2003-126257 (JP), filed on May 01, 2003; and application No. 2003-304932 (JP), filed on Aug. 28, 2003. | ||
| Prior Publication US 2007/0204820 A1, Sep. 06, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F01L 1/34 (2006.01) | ||
| U.S. Cl. 123—90.16 [123/90.15] | 13 Claims |
| 1. A valve train device for an engine for driving a valve which opens and closes a valve opening of a combustion chamber,
comprising:
a valve drive device comprising a drive member;
a drive force transmission mechanism configured to transmit a driving force from the drive member to the valve, the drive
force transmission mechanism comprising a transmission portion configured to transmit the driving force from the drive member
to the valve and a variable portion configured to continuously change a state of the transmission portion to thereby continuously
change an opening duration of the valve or the amount of valve lift, wherein at least part of the variable portion is positioned
within in the transmission portion;
wherein the state of the transmission portion is changed by changing the position of the variable portion with respect to
the transmission portion; and
wherein the transmission portion includes an arm comprising a pair of bearing portions that are pivotally supported on a support
shaft;
wherein the variable portion comprises a control arm that is pivotally supported on an eccentric shaft which is formed on
the support shaft between the pair of bearing portions.
|