A valve movement control system of an internal combustion...

F - Mech Eng,Light,Heat,Weapons – 01 – L

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F01L 1/34 (2006.01) F01L 1/053 (2006.01) F01L 1/26 (2006.01) F01L 1/344 (2006.01) F01L 9/02 (2006.01)

Patent

CA 2316448

In a valve movement control system of an internal combustion engine, a hydraulic operational characteristic variable mechanism with no operational lag or a shortened operational lag on re-starting of the engine is provided. The valve movement control system comprises a camshaft having a cam journal supported for rotation by a support member, a hydraulic operational characteristic variable mechanism provided on the camshaft, an oil pressure control valve, and a control oil passage for supplying operating oil to the operational characteristic variable mechanism through a plurality of members including the camshaft and the support member. An operating oil reserve chamber is provided above the cam journal for supplementing operating oil flowing out through a minute gap between the cam journal and the support member when the engine is stopped.

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