Liquefied gas fuel supply system
First Claim
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1. A liquefied gas fuel supply system comprising:
- a fuel tank in which a liquefied gas fuel is stored;
fuel supplying means for vaporizing said liquefied gas fuel for supply to an internal combustion engine;
a release path for releasing outside said fuel tank, evaporated gas fuel resulting from evaporation of said liquefied gas fuel within said fuel tank;
catalytic decomposing means disposed in said release path for chemically decomposing said evaporated gas fuel;
release control means disposed in said release path between said decomposing means and said fuel tank, said release control means selectively assuming a coupling state for causing said decomposing means to communicate with said fuel tank, and a decoupling state in which said decomposing means is decoupled from said fuel tank.
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Abstract
A system for vaporizing liquefied gas fuel supplied from a fuel tank and supplying it to an internal combustion engine includes a release path for releasing spontaneously evaporated fuel gas in said tank out of the tank. A catalytic burner is disposed in the release path for decomposing the fuel gas into hot steam and carbon dioxide. A release control valve disposed between the catalytic burner and the fuel tank selectively causes the burner and the fuel tank to communicate and to be decoupled from each other.
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Citations
13 Claims
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1. A liquefied gas fuel supply system comprising:
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a fuel tank in which a liquefied gas fuel is stored; fuel supplying means for vaporizing said liquefied gas fuel for supply to an internal combustion engine; a release path for releasing outside said fuel tank, evaporated gas fuel resulting from evaporation of said liquefied gas fuel within said fuel tank; catalytic decomposing means disposed in said release path for chemically decomposing said evaporated gas fuel; release control means disposed in said release path between said decomposing means and said fuel tank, said release control means selectively assuming a coupling state for causing said decomposing means to communicate with said fuel tank, and a decoupling state in which said decomposing means is decoupled from said fuel tank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A liquefied gas fuel supply system comprising:
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a fuel tank in which a liquefied gas fuel is stored; fuel supplying means for vaporizing said liquefied gas fuel for supply to an internal combustion engine; a release path for releasing outside said fuel tank, evaporated gas fuel resulting from evaporation of said liquefied gas fuel within said fuel tank; catalytic decomposing means in said release path for chemically decomposing gas evaporated from the liquefied gas fuel within said fuel tank; and switching means switchable between a first state for supplying evaporated gas to said decomposing means and a second state for supplying evaporated fuel gas to said fuel supplying means, said switching means being switched to said second state when the pressure within said fuel tank exceeds a first pressure related to a maximum bottling pressure of said fuel tank, and switched to said first state when the pressure within said fuel tank exceeds a second pressure higher than said first pressure, said second pressure being related to the withstanding pressure of said fuel tank. - View Dependent Claims (12)
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13. A liquefied gas fuel supply system comprising:
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a fuel tank in which a liquefied gas fuel is stored; fuel supplying means for vaporizing said liquefied gas fuel for supply to an internal combustion engine, the fuel supplying means including a surge tank; a buffer tank; a pressure control valve for coupling gas evaporated from said liquefied fuel gas within said fuel tank to said buffer tank when the pressure of the evaporated fuel gas exceeds a value related to the withstanding pressure of said fuel tank; re-liquefying means disposed between said buffer tank and said fuel tank for re-liquefying fuel gas within said buffer tank and supplying the re-liquefied gas to said fuel tank; and a pressure control valve disposed between said surge tank and said buffer tank for coupling fuel gas in said surge tank to said buffer tank when the pressure within said surge tank exceeds a pressure related to the withstanding pressure of said surge tank.
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Specification