Variable valve device

A variable valve device configured to change a valve operation in a cylinder head, the variable valve device comprising:

• a pair of cam housings separated from each other in a predetermined direction 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 supported by the pair of rocker shafts in a swingable manner;
• a switching mechanism that couples and separates intake arms among the plurality of rocker arms;
• and
• an upper housing supported at both ends on upper surfaces of the pair of cam housings, wherein
• 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 plurality of rocker arms, and
• the lubrication oil is pressure-fed from a lubrication groove around the camshaft to the first injection hole and the second injection hole, and a passage length from the lubrication groove to the second injection hole is larger than a passage length from the lubrication groove to the first injection hole.