FUEL SYSTEM


  1. CONSTRUCTION


    1. Fuel Injector Assembly


      1. High-pressure, slit-nozzle type fuel injector assemblies are used in conjunction with the adoption of the Direct injection 4-stroke gasoline engine (D-4) system.

      2. Each injector, based on signals from the ECM, measures the flow of high-pressure fuel. The fuel is injected as a fine-atomized mist in a fan shaped pattern, directly to the combustion chamber, via a slit type nozzle.

      3. An insulator is used in the area in which the injector comes in contact with the cylinder head, and a Teflon shaft seal is used to seal the injector against the combustion pressure in the cylinders. This is conducted in order to reduce vibration and noise and to enhance sealing performance.

      4. Each nozzle tip is coated to reduce the adhesion of deposits.

      5. The injectors are actuated by the EDU using high-voltage and a constant-current control based on instructions from the ECM. This control allows the injectors to inject high-pressure fuel in a short time frame.

        A0120HEC02
        *1 Insulator *2 Teflon Shaft Seal
        *a Fuel Injector Assembly Cross Section *b Injector Nozzle

    2. Cold Start Fuel Injector Assembly (Models with Cold Start Fuel Injector Assembly)


      1. A cold start fuel injector assembly is used to improve cold-starting performance. It is provided in the surge tank of the intake manifold and injects fuel when the engine is started and the engine coolant temperature is low.

        A0120ECC02
        *1 Intake Air Surge Tank Assembly *2 Cold Start Fuel Injector Assembly
        *3 Gasket - -
        *a Cold Start Fuel Injector Assembly Cross Section - -