Patent ID: 8869776

Claim:
An auxiliary device mounting structure for an internal combustion engine, comprising: a cylinder head defining a valve chamber in cooperation with a head cover; a camshaft rotatably supported by the cylinder head inside the valve chamber and having a coaxial and integral extension at an axial end thereof, the extension being formed with a radial cam; a first housing attached to the cylinder head, and defining a part of a housing chamber receiving the extension of the camshaft; a second housing attached to the first housing and defining a remaining part of the housing chamber; an auxiliary device supported by the second housing and provided with a plunger configured to be actuated by the radial cam of the extension; and at least two radial bearings are integrally formed on the first housing to rotatably support the extension, wherein the at least two radial bearings are located more inward than the axial end of the cylinder head, wherein a part of the extension located between the two bearings is provided with a thrust plate, the thrust plate being provided with a thrust bearing surface that cooperates with an opposing thrust bearing surface formed in a part of the first housing.