Valve mechanism having variable valve timing

Details Valve mechanism having variable valve timing Valve mechanism having variable valve timing

1984-03-22

1986-04-08

Cline, William R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9048, F01L 134

Patent

active

045805334

ABSTRACT:
A valve mechanism for an internal combustion engine has a valve and a cam on a camshaft for operating the valve. A swingable member is provided for swinging movement about the camshaft and has a tappet receiving hole. A tappet slidably received in the hole is driven by the cam and in turn drives the valve. The valve timing can be changed by swingably moving the swingable member. A control device is provided for holding the swingable member at a position wherein the direction of movement of the tappet is aligned with the direction of movement of the valve under a heavy load, high speed engine operation and moving the swingable member to another position wherein the direction of movement of the tappet is inclined with respect to the direction of movement of the valve under a light load, low speed operation to change the valve timing.

REFERENCES:
patent: 2260983 (1941-10-01), Walker
patent: 3385274 (1968-05-01), Shunta et al.
patent: 3422803 (1969-01-01), Stivender
patent: 3704696 (1972-12-01), Abell, Jr.
patent: 4285310 (1981-08-01), Takizawa et al.
patent: 4347812 (1982-09-01), Kosuda et al.
patent: 4442806 (1984-04-01), Matsuura et al.
patent: 4466390 (1984-08-01), Babitzka et al.

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