Rocker arm adapter for altering cam profile of exhaust valve

Details Rocker arm adapter for altering cam profile of exhaust valve Rocker arm adapter for altering cam profile of exhaust valve

1980-11-10

1983-07-12

Feinberg, Craig R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9046, 123 9058, F01L 134, F01L 124

Patent

active

043924611

ABSTRACT:
A rocker arm (18) adapter for use in the timing mechanism of an internal combustion engine is disclosed. The adapter is a method for altering the cam (10) profile of the exhaust valve of the engine with respect to the intake valve. It includes a fluidic delay device (44) mounted in either the first end (22) or the second end (24) of the rocker arm (18). The delay device (44) includes a piston (46) which is allowed to move various distances in a cavity formed in the rocker arm (18), the distance being directly related to the speed of movement of a push rod member (16). As the speed of the engine, and the speed of movement of the push rod (16), increases, the piston (46) will be allowed to move a greater distance into the cavity so that the delay in actuation of the rocker arm (18) by the push rod (16) is increased.

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Angrist, S. W., "Fluid Control Devices", Scientific American, vol. 211, No. 6 (Dec. 1964), pp. 80-88.

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