Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1980-04-02
1982-07-13
Feinberg, Craig R.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123182, 123316, F01L 1308
Patent
active
043388930
ABSTRACT:
A decompression device for an internal combustion engine having a camshaft (4) with at least one cam (21) having a base circle (20) and a lobe elevated therefrom, a valve acting at a combustion chamber, and a transmitting member, e.g., a push rod (12), transmitting the lift of the cam (21) to the valve, has a control shaft (5), a decompression cam (11) and a ratched wheel (8) connected to the control shaft (5), and a shifting member (14) interworking with the ratched wheel (8) for resetting the decompression cam (11). The decompression cam (11) is arranged between the transmitting member and a cam-free part of the camshaft (4) and the shifting member (14) is arranged eccentrically at the camshaft (4) at a distance to the axis of the camshaft (4) which is greater than half the root diameter thereof.
By this arrangement it is possible to lift the transmitting member, e.g., the push rod from the base circle of the cam of the camshaft without further supplementary means, simply by turning the decompression cam.
REFERENCES:
patent: 2850002 (1958-09-01), Hovel
patent: 3057336 (1962-10-01), Hatz
patent: 3496922 (1970-02-01), Campen
patent: 3901199 (1975-08-01), Smith
patent: 4184468 (1980-01-01), Freyn
Freyn Fritz
Pomfret Colin T.
Feinberg Craig R.
List Hans
Wolfe W. R.
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