Rocker arm adapter for altering cam profile of exhaust valve

Apparatus for altering the cam profile of a first valve of a cylinder of an internal combustion engine, with respect to a second valve of the same cylinder, comprising:

• a rocker arm having first and second ends and being pivotally mounted for movement about a pivot intermediate said ends, and between first and second positions, said second end engaging a valve stem of the first valve with the first valve being closed when said rocker arm is in said first position and open when said rocker arm is in said second position;
• means for biasing said rocker arm to said first position;
• a push rod having an end engaging said first end of said rocker arm, and an opposite end;
• an eccentric cam mounted for rotation about an axis and having a peripheral surface engaging said opposite end of said push rod to impart longitudinal movement thereto as said cam rotates;
• and delaying means formed in said first end of said rocker arm engaged by said push rod for delaying movement of said rocker arm from said first position to said second position for different increments of time depending on the speed of rotation of said cam, as said cam rotates about said axis, said delaying means includes a cavity, having inner and outer ends, formed in said first end of said rocker arm, said cavity having mounted therein a fluidic device comprising a manifold member mounted in said cavity intermediate said inner and outer ends to define an interior chamber and an exterior chamber, said interior chamber comprising a plurality of smaller interior chambers each having a different volume into which a fluid can flow, said manifold member having an inflow passageway oriented along a directional axis and a diversion passageway obliquely intersecting said inflow passageway, both communicating with said exterior chamber, and a plurality of outflow channels communicating, at first ends, with said inflow passageway, and, at second ends, with one of said interior chambers;
• wherein a first of said outflow channels continues substantially along said directional axis of said inflow passage into a first of said interior chambers which has the smallest fluid admission volume, a second of said outflow channels has a measure of angular diversion with respect to said directional axis and communicates with a second of said interior chambers having a larger fluid admission volume than that of said first interior chamber, and a third of said outflow channels has the greatest measure of angular diversion with respect to said directional axis and communicates with a third of said interior chambers having a larger fluid admission volume than that of said second interior chamber;
• a piston mounted for sliding movement in said exterior chamber and having a push rod engagement face engaged by said push rod engaging end and a fluid engagement face;
• and a fluid filling said interior chambers and said exterior chamber, said inflow passage, said diversion passage, and said outflow channels.

An apparatus for altering the operation of a valve of an internal combustion engine, said valve being movable between open and closed positions with valve operating means comprising:

• delaying means associated with the valve operating means for delaying movement of the valve from the closed position to the open position in response to the speed of operation of the internal combustion engine, said delaying means including means having a cavity, manifold means mounted in said cavity to define an interior chamber and an exterior chamber, said interior chamber comprising a plurality of chambers, each of said plurality of chambers having a different volume into which fluid can flow, said manifold means having inflow passage means and diversion passage means obliquely intersecting the inflow passage means, said inflow passage means and diversion passage means communicating with said exterior chamber, and a plurality of outflow channels open to the inflow passage means and the plurality of chambers, means for emptying said plurality of chambers of said fluid in response to closing movement of said valve, said fluid filling said interior chamber, exterior chamber, inflow passage means, diversion passage means, and outflow channels, and piston means mounted for sliding movement in the exterior chamber, said piston means being movable in response to operation of the valve operating means to increase the pressure of the fluid causing the fluid to flow in said inflow and diversion passage means and outflow channels.