FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel supply device for an internal combustion engine, suitably and compatibly serving vapor removal from a fuel injection mechanism and temperature rise suppression of a fuel in a tank while suppressing the enlargement of the device scale to the utmost.

SOLUTION: The fuel supply device comprises a main circulation passage Rd2 for circulating the fuel forcibly fed by the fuel tank 31 via the fuel injection mechanism 34 to the fuel tank 31 and a bypass Rd4 for circulating it from the upstream side of the fuel injection mechanism 34 to the fuel tank 31. The main circulation passage Rd2 contains a high pressure regulator 36 for keeping fuel pressure in the fuel injection mechanism 34 at a first pressure regulating set value and a communication control valve 37. On the other hand, the bypass Rd4 contains a low pressure regulator for keeping the fuel pressure in the fuel injection mechanism 34 at a second pressure regulating set value lower than the first pressure regulating set value and a bypass control valve 40. A fuel circulation mode of the fuel supply device 3 is changed over through the opening/closing operation of the control valves 37, 40.

COPYRIGHT: (C)2004,JPO