FUEL SYSTEM


  1. OUTLINE


    1. The 8NR-FTS engine uses a Direct injection 4-stroke gasoline engine (D-4) system. 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 to the combustion chamber.

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

    3. A fuel returnless system is used to reduce evaporative emissions.

    4. Fuel pressure control for the high-pressure fuel system is performed via the spill control valve installed in the fuel pump assembly (for high pressure).

    5. Fuel cut control is used to stop the fuel pump (for low pressure) when any of the Supplemental Restraint System (SRS) airbags are deployed.