US 11,719,137 B1
Variable valve timing system
Yasuto Takashiba, Hamamatsu (JP)
Assigned to SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed by SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed on Feb. 7, 2023, as Appl. No. 18/165,509.
Claims priority of application No. 2022-019251 (JP), filed on Feb. 10, 2022.
Int. Cl. F01L 1/34 (2006.01); F01L 1/344 (2006.01); F02F 1/16 (2006.01)
CPC F01L 1/3442 (2013.01) [F02F 1/16 (2013.01); F01L 2001/34426 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A variable valve timing system for an engine in which a cylinder head fixed on a cylinder is suspended on a vehicle body frame and a cam chain chamber is formed in the cylinder and the cylinder head, the variable valve timing system comprising:
a variable valve device configured to change an opening and closing timing of a valve by a hydraulic pressure; and
an oil control valve configured to control the hydraulic pressure with respect to the variable valve device, wherein
the oil control valve is disposed on an outer surface of the cylinder, which is an outer wall of the cam chain chamber, and the variable valve device is disposed inside the cylinder head, and
an oil path for hydraulic pressure control enters the outer wall of the cam chain chamber from the oil control valve, extends from a side of the cylinder to a side of the cylinder head, and crosses the cam chain chamber to the variable valve device through an inner wall of the cam chain chamber.