Device for supplying fuel to an internal combustion engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorSusumu Okawa
Life of this patent
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Abstract
Disclosed is a device for supplying fuel from the fuel tank to the carburetor in an internal combustion engine, which device includes a fuel pump adapted for forcibly supplying the necessary amount of fuel into the carburetor and for recirculating an extra amount of fuel to the fuel tank. A heat pipe is, on one end thereof, arranged to touch the fuel in the carburetor and, on the other end thereof, to touch the recirculated fuel. The heat pipe operates to remove the heat of the hot fuel in the carburetor and to transfer the heat to the recirculated cool fuel. Thus the evaporation of the fuel in the carburetor can be effectively prevented.
Claims2
A device for supplying fuel to an internal combustion engine of carburetor type, said device comprising:
- a fuel tank;
- first passageway means adapted for connecting said fuel tank with the float chamber of the carburetor;
- a pump device arranged on said first passageway means for forcibly introducing an amount of fuel into said float chamber;
- second passageway means connecting the first passageway means downstream of the pump device with said fuel tank for recirculating an extra amount of fuel from the first passageway means to the fuel tank, and;
- a heat pipe constituting a heat exchanging member, one end of said pipe being located in a middle portion of the float chamber so that it touches the fuel in the float chamber and the other end thereof being located in said second passageway means so that it touches the extra amount of fuel recirculated into the fuel tank from said first passageway means, whereby the heat of the hot fuel in the float chamber due to the high temperature of the carburetor is, via said heat pipe transmitted to the cool fuel recirculated in said second passageway means under a forced convection principle, thereby preventing an increase of the temperature of the fuel in the float chamber.
Dependencies are inferred from the claim text.