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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsAtsushi Kato, Yoshikazu Ohshima, Eisaku Gosho, Kazuhiro Ueda, Shigeo Hidai, Akira Murakami, Toshiyuki Nishida, Shigeru Aoki, Ryuichi Noseyama, Kenichiro Ishibashi, Katsunori Nakamura, Nobuo Arai
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Supply of fuel is stopped when fuel pressure sensed by a pressure sensor provided upstream of a regulator is at a predetermined value or less to avoid abnormal combustion caused by improper adjustment of air/fuel ratio. Even slight variation of the fuel pressure is sensed by monitoring the fuel pressure in an interval after closing a fuel shut-off valve once opened to re-opening of it. In addition, an abnormal state in the fuel system is detected by comparing an accumulated value of amount of injected fuel and an estimated value of fuel consumption in the tank. Furthermore, the peak current value of the fuel injection valve is controlled so that, when the engine at a low temperature is started, lift load of the injection valve is larger than sticking force of the injection valve, thereby preventing such situation where the injection valve is frozen so that it cannot supply fuel to the engine. In this case, the engine can be smoothly started by simultaneously controlling the valve open time. Furthermore, the temperature of the regulator is properly maintained so that optimum function can be exhibited by controlling the flow rate of cooling water flowing through a water passage provided in the regulator for regulating the fuel gas pressure.
A gas fuel supply system of a gas engine vehicle, comprising:
A fuel supply device for a vehicle having a pressure regulator in a fuel piping connecting a gas fuel tank and an engine and being adapted to supply a high-pressure gas held in said gas fuel tank to said engine after said gas is pressure reduced by means of said pressure regulator, said device comprising:
A method for detecting an abnormal state in a fuel supply system having a pressure regulator in a fuel supply piping connecting a gas fuel tank and an engine and being adapted to supply a high-pressure gas held in said gas fuel tank to said engine after said high-pressure gas is pressure reduced, said method comprising the steps of:
A fuel shut-off device for use on a vehicle, wherein a plurality of fuel shut-off valves and a plurality of pressure sensors are disposed with between a gas fuel tank and an engine, the fuel-shut-off valves being opened for a predetermined interval of time and then closed when an ignition system of said engine is energized, the pressure sensors monitoring pressure in the piping to open the fuel shut-off valves at the moment when a start signal of the engine is confirmed.
A system for sensing an abnormal state in a fuel system of a gas engine vehicle, comprising:
A fuel supply control unit for electromagnetically opening or closing a fuel injection valve of a fuel injection device of a gas fuel engine, comprising:
A regulator for a gas fuel engine, which comprises a water passage provided in a regulator for regulating pressure of fuel gas for a water-cooled gas engine vehicle, cooling water circulated through the engine being caused to flow through the water passage, wherein
Dependencies are inferred from the claim text.