Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-03-12
1999-01-12
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9012, 123 9048, F01L 1300, F01L 902
Patent
active
058574387
ABSTRACT:
A hydraulically operated mechanism which utilizes engine oil as the hydraulic fluid to open and close a cylinder valve is easily installed on a conventional internal combustion engine to improve engine performance over a wide range of operating parameters. A primary assembly has a piston that is actuated by the rotational movement of the cam lobe to pressurize oil inside a tube or hose and deliver pressurized oil to a secondary assembly to push open the valve. The secondary assembly has a secondary piston that utilizes a spring to abut against the valve. The hydraulic variable valve control mechanism optimizes the engine valve event by being self-adjusting and by virtually eliminating valve lash, resulting in improved engine performance, including horsepower, fuel consumption and exhaust emissions, at all ranges of engine speed. The hydraulically operated variable valve control mechanism reduces the amount of moving mechanical components in the conventional internal combustion engine by eliminating the need for the lifter, push rod and rocker arm.
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Lo Weilun
Ryan Richard A.
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