Variable valve timing apparatus
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorShoichi Honda
Life of this patent
Estimating the term…
Abstract
An apparatus for varying valve timing for use in an four-cycle internal combustion engine having two camshafts. These camshafts are juxtaposed on a common camshaft holder supported within a cylinder head. Each of the camshafts mounts thereon at least one cam adapted to slidingly contact with a rocker arm. The apparatus is provided with a means for selectively urging said rocker arm by the selective actuation of the cams between two camshafts.
Claims9
A variable valve timing apparatus for use in a four-cycle internal combustion engine, said engine including intake and exhaust valves each operated by a rocker arm, comprising:
- (a) a pair of camshafts extending in parallel with each other, one of said camshafts mounting thereon at least one cam for low speed operation, and the other camshaft mounting thereon at least one cam for high speed operation,
- (b) a camshaft holder for supporting said pair of camshafts, said camshaft holder being housed within a cylinder head, each of said camshafts having one end provided with a fixed gear, and said gears of said camshafts being in fixed meshing engagement with each other and being fixed against axial movement relative to each other, said one of said camshafts having an axial extension connected to a shaft drive means;
- and
- (c) means for selectively operating said rocker arm by the selective actuation of at least said high speed cam.
Dependencies are inferred from the claim text.