Patent ID: 8534260

Claim:
A fuel supply system comprising: a fuel tank storing a liquid fuel therein; a pump suctioning and feeding the liquid fuel stored in the fuel tank; a first injector injecting the liquid fuel supplied from the pump into a combustion chamber or an intake passage of an internal combustion engine; a second injector injecting the liquid fuel supplied from the pump into vaporized-fuel chamber to generate a vaporized fuel therein; a vaporized-fuel tank defining the vaporized-fuel chamber for storing the vaporized-fuel generated by an injection of the second injector, wherein the vaporized-fuel tank is heated by a heating means and the vaporized-fuel tank is heated by a combustion heat generated in the combustion chamber due to a fuel combustion; a vaporized-fuel pipe defining vaporized-fuel passage which introduces the vaporized fuel stored in the vaporized-fuel tank into the intake passage; a purge valve provided in the vaporized-fuel passage for selectively switching a communication between the vaporized-fuel chamber and the intake passage; a control unit having a first injection control means for controlling a fuel injection through the first injector, a second injection control means for controlling a fuel injection through the second injector, and a purge valve control means for controlling a switching operation of the purge valve; a heat exchanging portion disposed on the cylinder block and defining a heat exchanging chamber through which a circulation fluid circulates in order to heat-exchange with the cylinder block, wherein the vaporized-fuel tank is in contact with the heat exchanging portion; and a preheat pipe defining a preheat passage around the fuel supply pipe which introduces the liquid fuel to the second injector, wherein the circulation fluid circulates through the preheat passage.