Abstract: A control system for a gaseous-fueled engine is disclosed. The gaseous-fueled engine may have an intake valve mechanically driven by a camshaft. The control system may have a variable valve timing device configured to adjust a cyclical opening and closing timing of the intake valve. The control system may further have a sensor configured to generate a signal indicative of a speed of the engine and a controller in communication with the variable valve timing device and the sensor. In addition, the controller may be configured to selectively initiate a first Miller Cycle timing and a second Miller Cycle timing based on the signal.

Abstract: A multi-valued logic (MVL) circuit includes a MVL clock generator that generates a MVL clock signal having three or more ith MVL levels, a single MVL clock signal distribution network connected to the MVL clock generator, and three or more ith MVL selection circuits connected to the single MVL clock signal distribution network where i=0 to N and N>=3. Each ith MVL selection circuit corresponds to a specified ith MVL level. The ith MVL selection circuit outputs an ith binary clock signal having: (a) a first logic level whenever the MVL clock signal is equal to the ith MVL level and the ith data input receives the first logic level, (b) a second logic level whenever the MVL clock signal is equal to the ith MVL level and the ith data input receives the second logic level, and (c) a previous logic level of the ith binary clock signal whenever the MVL clock signal is not equal to the ith MVL level.

Abstract: A control system for a gaseous-fueled engine is disclosed. The gaseous-fueled engine may have an intake valve mechanically driven by a camshaft. The control system may have a variable valve timing device configured to adjust a cyclical opening and closing timing of the intake valve. The control system may further have a sensor configured to generate a signal indicative of a speed of the engine and a controller in communication with the variable valve timing device and the sensor. In addition, the controller may be configured to selectively initiate a first Miller Cycle timing and a second Miller Cycle timing based on the signal.

Abstract: A four stroke internal combustion includes at least one cylinder and at least one intake valve associated with the cylinder. The intake valve is configured to open and close over a predetermined range of crankshaft rotation in accordance with a Miller thermodynamic cycle. An electronic controller receives at least one input signal indicative of an amount of air and/or an amount of air/fuel mixture in cylinder. The electronic controller is configured to provide a timing phase signal that operates to adjust a timing of operation of the intake valve based on the input signal(s) such that a torque output of the engine is maintained substantially constant over a predetermined range of engine speed by shifting the predetermined range of crankshaft rotation.