Variable valve device
AssigneeSuzuki Motor Corporation
InventorsHisashi Ozeki, Yuuta Kagawa
Life of this patent
Estimating the term…
Abstract
A variable valve device includes a pair of cam housings separated from each other in a predetermined direction, a pair of rocker shafts supported by the pair of cam housings, a plurality of rocker arms supported by the pair of rocker shafts in a swingable manner, a switching mechanism that couples and separates intake arms, and an upper housing on the pair of cam housings. The upper housing is formed with a first injection hole for supplying lubrication oil to the switching mechanism and a second injection hole for supplying lubrication oil to the rocker arms. A passage length from a lubrication groove around a camshaft to the second injection hole is larger than a passage length from the lubrication groove to the first injection hole.
Claims7
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.
Dependencies are inferred from the claim text.