초록 ▼

One embodiment of the present invention includes sensing speed or an internal combustion engine that includes a manifold coupled to an air pathway and a gaseous fuel line, sensing manifold pressure, and sensing manifold temperature. Air mass flow rate is determined as a function of the sensed engine

One embodiment of the present invention includes sensing speed or an internal combustion engine that includes a manifold coupled to an air pathway and a gaseous fuel line, sensing manifold pressure, and sensing manifold temperature. Air mass flow rate is determined as a function of the sensed engine spaced, manifold pressure, and manifold temperature. Fuel mass flow rate in the fuel line is sensed and fuel is controlled through the fuel line in accordance with the air mass flow rate and the fuel mass flow rate.

대표청구항 ▼

1. An apparatus, comprising:an internal combustion engine including a manifold coupled to an air pathway and a gaseous fuel line with a butterfly valve to modulate gaseous fuel flow therethrough; a first sensor operable to provide a pressure signal corresponding to manifold pressure; a second sensor

1. An apparatus, comprising:an internal combustion engine including a manifold coupled to an air pathway and a gaseous fuel line with a butterfly valve to modulate gaseous fuel flow therethrough; a first sensor operable to provide a pressure signal corresponding to manifold pressure; a second sensor operable to provide a temperature signal corresponding to manifold temperature; and a third sensor operable to provide a fueling signal corresponding to fuel mass flow in the gaseous fuel line; and a controller including: means for determining air mass flow rate from said pressure signal and said temperature signal in accordance with the speed-density equation; means for calculating a desired fuel flow rate in accordance with the air mass flow rate, said calculating means including a closed loop fuel flow compensator; means for generating a valve signal as a function of the fueling signal and the desired fuel flow rate, said generating means including a closed loop valve signal compensator; and means for adjusting the butterfly valve in response to said valve signal.