| 摘要 |
PURPOSE: A dual fuel supply control system for a GDI(Gasoline Direct Injection) engine is provided to stabilize the whole system as abnormal internal pressure in the fuel rail of the GDI engine bypasses a fuel tank. CONSTITUTION: A dual fuel supply control system for a GDI(Gasoline Direct Injection) engine(1) comprises a plurality of dual fuel injectors(12), a plurality of dummies, and an ECU(Electronic Control Unit) for controlling dual fuel. The dual fuel injectors jet the dual fuel corresponding to a saturation drive signal from the ECU. One side terminal of the dummy is conjunct with one terminal of a GDI injector(6), and the other terminal of the dummy is connected to one fixed terminal of a contact switch of an injector switching relay. The ECU recognizes that the GDI injector is normally operated while a shunt delivers an injection signal to the ECU when the current flows in a vehicle body. A wave amplification and operation unit calculates a correction value while the ECU outputs the saturation drive signal by extracting the real on-time of the fuel injectors. The ECU for controlling the dual fuel performs a control function to operate the GDI engine by the dual fuel. [Reference numerals] (11) Electronic control unit for gasoline direct injection; (AA) Electronic control unit for dual fuel injection |
