FUEL PRESSURE CONTROL DEVICE IN FUEL INJECTION TYPE GASOLINE ENGINE

摘要

PURPOSE:To eliminate shortage of injection amount in high load and high rotation area by providing a switch valve closing in high load and high rotation area and a sub pressure control valve responsible to intake pressure in parallel in a return passage from a delivery pipe to fuel tank. CONSTITUTION:A switch valve 12 closing in a high load and high rotation area and a sub pressure control valve responsible to intake pressure are provided in parallel in a return passage 8 from a delivery pipe 6 communicating to injectors 2 of respective cylinders to a fuel tank 4, and a set pressure of the sub pressure control valve 14 is made higher than that of a pressure control valve 9. Then, shortage of injection amount in fuel injection in the high load and high rotation area can be eliminated.