Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Patent
1984-04-30
1985-03-19
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
123 27GE, 123577, 48180R, 48189, F02B 4300
Patent
active
045052492
ABSTRACT:
A fuel control system for use in supplying gaseous fuel from a high pressure source to an internal combustion engine which has an air/fuel intake through which air and gaseous fuel is supplied to the engine and an air/fuel intake manifold in which variations in the vacuum are indicative of engine loading conditions. The system comprises; a pressure regulator, a flow control valve, a control for measuring the speed of the engine, a modulator for modulating the fuel supply and a pressure control device communicating with said pressure regulator to increase or decrease the pressure in the gaseous fuel output in response to the receipt of a signal from the modulator. The pressure regulator receives pressurized gaseous fuel from the source and serves to maintain a constant pressure in the discharging fuel for a given engine speed regardless of flow rate and to increase or decrease the pressure in the discharging gaseous fuel in response to an increase or decrease in engine speed. The flow control valve is operable to control the flow of gaseous fuel in response to engine loading conditions regardless of engine speed. The modulator communicates with the output from the pressure regulator to measure the pressure of the fuel supply to the flow control valve. The modulator also communicates with the control means and cooperates therewith to generate a signal which is indicative of an undesirably low pressure or a signal which is indicative of an undesirably high pressure and one or other of these signals is communicated to the control. The pressure control communicates with said pressure regulator to increase or decrease the pressure in the gaseous fuel output in response to the receipt of one or other of said signals.
REFERENCES:
patent: 4063905 (1977-12-01), Johnson et al.
patent: 4141326 (1979-02-01), Wolber
patent: 4149562 (1979-04-01), Johnson
patent: 4227497 (1980-10-01), Mathieson
patent: 4308843 (1982-01-01), Garretson
patent: 4364364 (1982-12-01), Subramaniam
Cross E. Rollins
EMCO Wheaton International Limited
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