Abstract: A method of operating an engine system comprising operating a first cylinder group at a first number of strokes per combustion cycle, operating a second cylinder group at a second number of strokes per combustion cycle, the second number of strokes per cycle being different than the first number of strokes per cycle.

Abstract: Methods and apparatus for controlling an engine having a first maximum power rating based on at least a first predetermined operating condition of the engine. A first sensor transmits a first signal as a function of the engine operating at a predetermined operating condition other than the first predetermined operating condition. A control device receives the first signal and transmits a power signal to the engine as a function of the first signal. The power signal may, by itself, or in conjunction with other signals, cause the engine to produce a quantity of power in excess of the first maximum power rating.

Abstract: An engine controller regulates fuel flow to an internal combustion engine based on sensed air flow and sensed engine operational parameters. The engine controller includes a speed sensor, a power sensor, an airflow meter and a controller unit. The speed sensor generates an engine speed signal representative of sensed engine speed, the power sensor generates an output power signal representative of sensed engine output power and the airflow meter generates an actual airflow signal representative of sensed airflow. The controller unit is responsive to the engine speed signal, the output power signal and the actual airflow signal and develops a command signal for an air-fuel mixer.

Abstract: Methods and apparatus for controlling an engine having a first maximum power rating based on at least a first predetermined operating condition of the engine. A first sensor transmits a first signal as a function of the engine operating at a predetermined operating condition other than the first predetermined operating condition. A control device receives the first signal and transmits a power signal to the engine as a function of the first signal. The power signal may, by itself, or in conjunction with other signals, cause the engine to produce a quantity of power in excess of the first maximum power rating.

Abstract: A fuel system for a gas engines has exhaust gas monitors for signals (p, T, V) related to exhaust gas mass flow with an air to fuel controller that acts to adjust the intake of a gaseous fuel, which can vary widely in composition, to maintain a desired level of exhaust gas mass flow.