FUEL SYSTEM


  1. OUTLINE


    1. D-4S System


      1. The Direct injection 4-stroke gasoline engine Superior version (D-4S) system is based on 2 types of fuel injection systems: the direct injection system and the port injection system. Fuel sent from the fuel tank assembly is delivered to the low-pressure and high-pressure fuel systems. The fuel delivered to the low-pressure fuel system is injected from the fuel injector assembly (for port injection) to the intake port. The fuel delivered to the high-pressure fuel system is pressurized by the fuel pump assembly (for high pressure) and injected from the fuel injector assembly (for direct injection) to the combustion chamber.

      2. The direct injection system mainly consists of the fuel pump assembly (for high pressure), fuel delivery pipe sub-assembly (for direct injection) and fuel injector assembly (for direct injection). In this system, the ECM controls the fuel pump assembly (for high pressure) and fuel injector assembly (for direct injection) via the Electronic Driver Unit (EDU) based on signals from various sensors, thus optimally controlling fuel pressure, injection volume, and injection timing.

      3. The port injection system mainly consists of the fuel pump assembly (for low pressure), fuel delivery pipe sub-assembly (for port injection), and fuel injector assembly (for port injection). In this system, the ECM controls the fuel injector assembly (for port injection) based on signals from various sensors, thus optimally controlling injection volume and timing.

        A001YZKE02
        Text in Illustration
        *1 Power Management Control ECU *2 ECM
        *3 EDU (Injector Driver) *4 Fuel Pressure Pulsation Damper Assembly
        *5 Fuel Delivery Pipe Sub-assembly (for Port Injection) *6 Fuel Injector Assembly (for Port Injection)
        *7 Fuel Injector Assembly (for Direct Injection) *8 Fuel Delivery Pipe Sub-assembly (for Direct Injection)
        *9 Fuel Pressure Sensor *10 Solenoid Valve Assembly
        *11 Fuel Pressure Pulsation Damper *12 Fuel Tank Assembly
        *13 Fuel Main Valve Assembly (Return) *14 Fuel Main Valve Assembly
        *15 Jet Pump *16 Fuel Pressure Regulator Assembly
        *17 Fuel Filter Assembly *18 Fuel Pump Assembly
        *19 Spill Control Valve *20 Check Valve
        *21 Orifice *22 Relief Valve
        *23 Fuel Pump Lifter Assembly *24 Exhaust Camshaft (Cam to Drive Fuel Pump)
        *a CAN (Bus 2) *b CAN (Sub Bus 15)
        B002B1E Low-pressure Fuel B002AYA High-pressure Fuel