Abstract: An internal combustion engine is provided having an engine block defining a pressurized oil source and rotatably supporting a crankshaft. A camshaft is rotatably mounted within the engine block and defines an axially extending cavity. The cavity extends between opposed first and second ends of the camshaft. A cam phaser is mounted to the second end of the camshaft and is operable to vary the timing of the camshaft with respect to the crankshaft in response to pressurized oil. A cover is removably mounted to the engine block and is operable to substantially enclose the first end of the camshaft. The cover at least partially defines a passage in communication with the pressurized oil source and cavity. The passage and the cavity are operable to communicate pressurized oil from the pressurized oil source to the cam phaser to actuate the cam phaser.

Abstract: An internal combustion engine is provided having an engine block defining a pressurized oil source and rotatably supporting a crankshaft. A camshaft is rotatably mounted within the engine block and defines an axially extending cavity. The cavity extends between opposed first and second ends of the camshaft. A cam phaser is mounted to the second end of the camshaft and is operable to vary the timing of the camshaft with respect to the crankshaft in response to pressurized oil. A cover is removably mounted to the engine block and is operable to substantially enclose the first end of the camshaft. The cover at least partially defines a passage in communication with the pressurized oil source and cavity. The passage and the cavity are operable to communicate pressurized oil from the pressurized oil source to the cam phaser to actuate the cam phaser.

Abstract: A cam drive assembly for an automotive engine comprises a crankshaft sprocket mounted for rotation with a crankshaft, a camshaft sprocket mounted for rotation with a camshaft, and a chain rotatably operable between the crankshaft sprocket and the camshaft sprocket. A chain tensioner provides tension to the chain and is supported only by an engine block side wall. The chain tensioner is comprised of a stationary portion and a flexible spring portion supported thereto, and a nylon shoe fixed to the flexible spring portion to provide a contact surface for the chain. The stationary portion has a geometrical interlocking feature to mate with a complementary geometric feature in the engine block side wall to restrict upper and lower movement of the chain tensioner. The geometrical interlocking feature of the chain tensioner may be a concave retention portion, which fits over a complementary convex nub in the engine block side wall to restrict movement of the chain tensioner by part interference.