US 12,331,668 B1
Variable valve device
Hisashi Ozeki, Hamamatsu (JP); and Yuuta Kagawa, Hamamatsu (JP)
Assigned to SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed by SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed on Nov. 18, 2024, as Appl. No. 18/951,001.
Claims priority of application No. 2023-203518 (JP), filed on Dec. 1, 2023.
Int. Cl. F01M 9/10 (2006.01); F01L 1/053 (2006.01); F01L 1/18 (2006.01); F01L 1/26 (2006.01); F01L 13/00 (2006.01)
CPC F01M 9/108 (2013.01) [F01L 1/053 (2013.01); F01L 1/181 (2013.01); F01M 9/102 (2013.01); F01M 9/105 (2013.01); F01L 2001/0535 (2013.01); F01L 2001/186 (2013.01); F01L 1/267 (2013.01); F01L 13/0036 (2013.01); F01L 2810/02 (2013.01); F01M 9/103 (2013.01); F01M 9/107 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A variable valve device configured for adjusting a valve operation in a cylinder head, the variable valve device comprising:
a pair of cam housings separated from each other in the cylinder head;
a camshaft supported by the cylinder head and the pair of cam housings;
a pair of rocker shafts supported by opposing portions of the pair of cam housings;
a plurality of rocker arms pivotally supported by the pair of rocker shafts, the plurality of rocker arms including a first intake rocker arm, a second intake rocker arm, and an exhaust rocker arm;
a switching mechanism configured to selectively couple the first intake rocker arm to the second intake rocker arm; and
an upper housing including:
a first end and a second end respectively supported on upper surfaces of the pair of cam housings,
a first injection hole configured to supply lubrication oil to the switching mechanism, and
a second injection hole configured to supply the lubrication oil to the plurality of rocker arms,
wherein the lubrication oil is pressure-fed from a lubrication groove formed around an outer surface of the camshaft to the first injection hole and the second injection hole such that a passage length from the lubrication groove to the second injection hole is greater than a passage length from the lubrication groove to the first injection hole, and
wherein a hydraulic circuit configured to actuate the switching mechanism is different from a hydraulic circuit of the lubrication oil.