초록 ▼

An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine. Fuel and air valves for controlling the air/fuel mixture are coupled together and actuated by a diaphragm in response to a fluid pressure signal, derived from the intake

An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine. Fuel and air valves for controlling the air/fuel mixture are coupled together and actuated by a diaphragm in response to a fluid pressure signal, derived from the intake manifold pressure of the engine, acting on the diaphragm. The fuel valve is also independently acutated by a stepper motor mounted to the diaphragm and operated by a remote electrical control signal from a controller designed to measure engine performance and provide a signal to correct any deficiencies in the air/fuel mixture such as a feedback controller receiving inputs from oxygen, speed and other sensors for measuring engine performance. Becuase of the dual control of the fuel valve, the device is capable of handling a wide range of gaseous fuels of different BTU content and of providing a more optimum air/fuel mixture for better fuel economy, emissions control and engine performance.

대표청구항 ▼

An air gas mixing device of the type used to mix gaseous fuel with air as an air/fuel mixture for discharge into an air intake conduit means of an internal combustion engine, comprising: a housing having an air duct extending through the housing, the air duct having an air inlet and an air-fuel mixt

An air gas mixing device of the type used to mix gaseous fuel with air as an air/fuel mixture for discharge into an air intake conduit means of an internal combustion engine, comprising: a housing having an air duct extending through the housing, the air duct having an air inlet and an air-fuel mixture discharge outlet downstream of the air inlet in the direction of fluid flow, the housing arranged to be connected to the air intake conduit means of the engine so that the discharge outlet of the air duct is in communication with said intake conduit means; an air valve for controlling the rate of air flow through said air duct; a primary fuel inlet in communication with said air duct for delivery of gaseous fuel for mixture with air flowing through said air duct; a fuel valve for controlling the rate of fuel flow through said fuel inlet, the fuel valve having open and closed positions, and the rate of fuel being delivered through said fuel inlet being dependent on the degree to which said fuel valve is opened; a first fuel valve actuator means automatically operated by a remote first fuel valve control signal for moving the fuel valve in an open position to a predetermined degree in response to the first fuel valve control signal; and a second fuel valve actuator means automatically operated by a remote second fuel valve control signal for adjusting the opening of the fuel valve independently of and relative to the first fuel valve actuator means in response to the second control signal whereby the fuel valve is opened to a predetermined degree by said first actuating means in response to said first control signal and the opening thereafter adjusted by said second actuating means in response to said second control signal to provide an optimum fuel delivery rate.