Arrangement for the operation of valves of internal combustion e

Details Arrangement for the operation of valves of internal combustion e Arrangement for the operation of valves of internal combustion e

1997-02-05

1997-11-25

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9046, 123198F, 123 9023, F01L 126, F01L 1300, F02D 1306

Patent

active

056900678

ABSTRACT:
In an arrangement for operating the intake and exhaust valves of an internal combustion engine wherein valve actua-ting and coupling levers are pivotally supported in side-by-side relationship on a lever support shaft extending parallel to an overhead cam shaft, and the coupling and valve actuating levers have guide bores receiving a coupling bolt so as to be movable into and out of a coupling lever and valve actuating lever coupling relationship and further a hydraulic valve clearance compensating element is disposed in a bore formed at the end of the actuating lever adjacent a valve, the guide bore center axis is spaced from the lever support shaft axis by a distance which is greater than the distance between the guide bore center axis and the axis of the valve clearance compensating element, and the support lever shaft axis, the center axis of the guide bores and the engagement line of the cam define approximately an isosceles triangle whose sides of equal length are formed by the distance between the engagement line and the lever support shaft axis and the distance between the cam engagement line and the guide bore center axis and the camshaft is disposed at least partially above the valve actuating and coupling levers.

REFERENCES:
patent: 5456225 (1995-10-01), Oikawa et al.
patent: 5515820 (1996-05-01), Sugimoto et al.
patent: 5529032 (1996-06-01), Oikawa et al.
patent: 5592907 (1997-01-01), Hasebe et al.

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