Hydraulic valve lifter for internal combustion engine

Details Hydraulic valve lifter for internal combustion engine Hydraulic valve lifter for internal combustion engine

1975-12-29

1977-05-03

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9056, F01L 124

Patent

active

040208060

ABSTRACT:
A hydraulic valve lifter for an automotive internal combustion engine, having a lifter cylinder formed with a first cylinder chamber contractable in response to a force exerted on the lifter from the cam on the engine camshaft and a second cylinder chamber contractable between a zero volume condition and a maximum volume condition in response to variation in the engine oil directed into the lifter, whereby the valve timings and valve lift are varied with the engine-oil-pump pressure that varies with engine speed.

REFERENCES:
patent: 1966794 (1934-07-01), George
patent: 2220336 (1940-11-01), Johnson
patent: 2346737 (1944-04-01), Essl
patent: 2376182 (1945-05-01), Peterson
patent: 2966151 (1960-12-01), Wood
patent: 3163158 (1964-12-01), Green
patent: 3304925 (1967-02-01), Rhoads
patent: 3385274 (1968-05-01), Shunta
patent: 3406668 (1968-10-01), Donnelly
patent: 3658038 (1972-04-01), Bergmann
patent: 3742921 (1973-07-01), Rendine

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