ТОПЛИВНАЯ СИСТЕМА ОБЩИЕ СВЕДЕНИЯ


  1. OUTLINE


    1. The 2AR-FSE engine uses a Direct injection 4-stroke gasoline engine Superior version (D-4S) system, which has both direct and port type fuel injection.


      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 EDU (injector driver) 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.

    2. This system optimally controls the fuel injectors for direct injection and port injection in accordance with engine load. The system achieves improved engine performance, fuel economy, and clean emissions.

    3. Fuel cut control is used to stop the fuel pump assembly (for low pressure) if any of the SRS airbags are deployed.

    4. Fuel injector assemblies (for direct injection) with a high-pressure single slit nozzle are used.

    5. A fuel returnless system is used to reduce evaporative emissions. As shown below, by integrating the fuel filter assembly, fuel pressure regulator assembly and fuel pump assembly (for low pressure), it is possible to discontinue the return of fuel from the engine area, thus preventing temperature rise inside the fuel tank assembly. This reduces the generation of evaporative emissions in the fuel tank assembly.

      A01FPX7E02
      Text in Illustration
      *1 Fuel Delivery Pipe Sub-assembly (for Direct Injection) *2 Fuel Injector Assembly (for Direct Injection)
      *3 Fuel Injector Assembly (for Port Injection) *4 Fuel Delivery Pipe Sub-assembly (for Port Injection)
      *5 Fuel Pump Assembly (for High Pressure) *6 Fuel Tank Assembly
      *7 Fuel Pressure Regulator Assembly *8 Jet Pump
      *9 Fuel Pump Assembly (for Low Pressure) *10 Fuel Filter Assembly