FUEL SYSTEM


  1. FUNCTION


    1. Fuel Returnless System


      1. This system is used to reduce evaporative emissions. As shown below, by integrating the fuel filter, fuel pressure regulator assembly, charcoal canister, fuel sender gauge assembly, and fuel pump, 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.

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        *1 Fuel Injector Assembly *2 Fuel Delivery Pipe Sub-assembly
        *3 Fuel Pressure Regulator Assembly *4 Fuel Filter
        *5 Fuel Pump *6 Charcoal Canister
        *7 Fuel Suction Tube with Pump and Gauge Assembly *8 Fuel Sender Gauge Assembly
        *9 Fuel Tank Assembly - -

  2. CONSTRUCTION


    1. Fuel Tank Assembly


      1. A multiple layer plastic fuel tank assembly is used. This fuel tank assembly consists of 6 layers of 4 types of materials.

      2. A fuel drain mark has been provided at the lowest position of the fuel tank assembly. When dismantling (scrapping) the vehicle, drain fuel by drilling a hole at the drain mark.

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        *1 Fuel Suction Tube with Pump and Gauge Assembly *2 Fuel Inlet Pipe
        *3 High Density Polyethylene (HDPE) *4 Regrind Material
        *5 Adhesive *6 Ethylene Vinyl Alcohol Copolymer (EVOH)
        *7 Fuel Drain Mark - -
        *a Exterior of Fuel Tank Assembly *b Interior of Fuel Tank Assembly
        *c Fuel Tank Wall Cross Section *d View from Bottom Side

    2. Fuel Suction Tube with Pump and Gauge Assembly


      1. A compact fuel pump, fuel filter, fuel pressure regulator assembly, fuel sender gauge assembly and charcoal canister are integrated into the fuel suction tube with pump and gauge assembly.

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        *1 Fuel Sender Gauge Assembly *2 Charcoal Canister
        *3 Fuel Pump *4 Fuel Filter
        *5 Fuel Pressure Regulator Assembly - -
        *a Cross Section - -

    3. Fuel Delivery Pipe Sub-assembly


      1. A pressed steel fuel delivery pipe sub-assembly is used.

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        *1 Fuel Delivery Pipe Sub-assembly *2 Fuel Injector Assembly
        *a A-A Cross Section - -

    4. Fuel Injector Assembly


      1. The fuel injector assembly is shaped to form a long nozzle. This shortens the distance from the injector to intake valves, which helps to prevent the fuel from adhering to the intake port walls and reduces exhaust emissions.

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        *a View from A - -