Integrated fuel measurement and control system for gaseous fuels

Details Integrated fuel measurement and control system for gaseous fuels Integrated fuel measurement and control system for gaseous fuels

1997-02-10

1998-05-19

Solis, Erick R.

Internal-combustion engines

Charge forming device

Fuel injection system

123527, 251 3002, 25112907, 251282, F02M 5100, F02M 2104

Patent

active

057524890

ABSTRACT:
A fuel measurement and control system for a gaseous fuel engine having a solenoid actuated fuel flow control valve which is electronically actuated to control a desired metering duration when the control system is operating in a fuel flow control mode. The fuel measurement and control system further includes mode control valve for switching the control system between a fuel flow control mode and a positive fuel shutoff mode, wherein the fuel flow control valve is prevented from opening when the control system is operating in a positive fuel shutoff mode. The fuel flow control valve includes a pressure balance chamber to balance the biasing forces acting on the valve from the gaseous fuel, wherein gaseous fuel is introduced into the pressure balancing chamber to provide the balancing forces. The mode control valve connects the pressure balance chamber to either the fuel supply or the air stream mixer inlet to provide the desired pressure in the pressure balance chamber, wherein the fuel flow control valve is biased to a closed position and prevented from opening when the pressure balance chamber is connected to the air stream mixer inlet and the fuel flow control valve is pressure balanced and may be actuated to control fuel flow when the pressure balance chamber is connected to the gaseous fuel supply. A damping chamber is connected to the pressure balance chamber for damping the oscillations of the solenoid actuator and further reducing the effects of engine vibrations on the solenoid actuator.

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