초록 ▼

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 lo

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.

대표청구항 ▼

A fuel control system for use in supplying gaseous fuel from a high pressure source of gaseous fuel to an internal combustion engine which has an air/fuel intake through which air and gaseous fuel is supplied to the engine and means indicative of engine loading conditions comprising: (a) a pressure

A fuel control system for use in supplying gaseous fuel from a high pressure source of gaseous fuel to an internal combustion engine which has an air/fuel intake through which air and gaseous fuel is supplied to the engine and means indicative of engine loading conditions comprising: (a) a pressure regulator having an input for receiving pressurized gaseous fuel from said source and an output for discharging gaseous fuel, said pressure regulator being adapted 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, (b) a flow control valve having an input communicating with the output of said pressure regulator and an output communicating with said air/fuel intake of said engine, said flow control valve having a valve actuator member which communicates with said means which is indicative of engine loading conditions so as to be operable to control the flow of gaseous fuel from its output in response to engine loading conditions regardless of engine speed, (c) control means communicating with said engine for measuring the speed of the engine and generating a first signal which is indicative of the engine speed, (d) modulator means communicating with the output from the pressure regulator to measure the pressure of the fuel supply to the flow control valve, said modulator also communicating with the control means to receive said first signal, said modulator means being adapted to compare the measured pressure with the measured speed and to generate a third signal which is indicate of an undesirably low pressure or a fourth signal which is indicative of an undesirably high pressure, said third or fourth signals being communicated to said control means, (e) pressure control means communicating with said pressure regulator to increase or decrease the pressure in the gaseous fuel output in response to the receipt of said third or fourth signals respectively.