Abstract: A system and method for actuating at least one engine valve in an internal combustion engine to produce an engine valve event is disclosed. The system of the present invention may comprise: means for imparting motion to the at least one engine valve for producing the engine valve event; primary means for transmitting the motion from the motion imparting means to the at least one engine valve; and auxiliary means for transmitting the motion from the motion imparting means to the at least one engine valve. The auxiliary means may actuate the at least one engine valve only when the primary means is shut-off or fails.

Abstract: A gate valve for controlling fluid flow through a housing is disclosed. The gate valve includes a frusto-conical shaped internal cavity having a fluid inlet and a fluid outlet formed in the wall thereof. Fluid flow through the cavity (from inlet to outlet) is transverse to the direction of the taper of the frusto-conical cavity. A gate including a frusto-conical portion is disposed within the housing. The frusto-conical portion of the gate may be moved transversely through the fluid flow passing from the internal cavity inlet to the outlet. The frusto-conical portion of the gate is adapted to seat against the frusto-conical shaped internal cavity to block fluid flow there through. The gate does not contact the seat until the point at which all fluid flow is shut off. This reduces wear on the gate and the seat and promotes laminar flow through the valve during the process of closing the valve.

Abstract: An apparatus and method for effectuating multi-cycle engine braking is disclosed. The present invention controls the operation of the engine valves to permit more than one compression release event during a single engine operating cycle. The apparatus includes an assembly for operating at least one exhaust valve of an engine cylinder during a positive power operation. The apparatus further includes an assembly for operating at least one intake valve of the engine cylinder. The apparatus further including an assembly for operating the at least one exhaust valve during an engine braking operation.