Valve operating device for internal combustion engine

Details Valve operating device for internal combustion engine Valve operating device for internal combustion engine

1987-12-24

1989-02-28

Wolfe, Willis R.

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

123 9017, 123 9034, 123 9036, F01L 118, F01L 126, F01M 910

Patent

active

048075744

ABSTRACT:
A valve operating mechanism for an internal combustion engine has a low-speed cam for operating the intake or exhaust valves during low-speed operation of the engine and a high-speed cam for operating the intake or exhaust valves during high-speed operation of the engine. A low-speed lubricating oil passage is provided for supplying lubricating oil to the low-speed cam and a separate high-speed lubricating oil passage is provided for supplying lubricating oil to the high-speed cam. A control valve is connected to said low-speed and high-speed lubricating oil passages for selectively supplying maximum oil pressure to the high-speed lubricating oil passage during high-speed operation while restricting the rate of flow of oil during low-speed operation of the engine and supplying maximum oil pressure to the low-speed lubricating oil passage during low-speed operation of the engine while restricting or eliminating the oil supplied thereto during high-speed operation.

REFERENCES:
patent: 3628513 (1971-12-01), Grosseau
patent: 3782357 (1974-01-01), Kuhn et al.
patent: 4441465 (1984-04-01), Nakamura
patent: 4535732 (1985-08-01), Nakano et al.
patent: 4537165 (1985-08-01), Honda et al.
patent: 4545342 (1985-10-01), Nakano et al.
patent: 4656977 (1987-04-01), Nagahiro et al.
patent: 4709667 (1987-12-01), Ichihara et al.

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