FUEL SYSTEM


  1. CONSTRUCTION


    1. The supply pump assembly consists of an eccentric camshaft, a ring cam, 2 plungers, 4 check valves, a Suction Control Valve (SCV), a fuel temperature sensor and a feed pump.

    2. The 2 plungers are placed opposite each other outside of the ring cam.

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      *1 Check Valve (for Suction) *2 Plunger
      *3 Eccentric Camshaft *4 Ring Cam
      *5 Check Valve (for Discharge) *6 Feed Pump
      *7 Fuel Temperature Sensor *8 SCV
      *a To Fuel Tank Assembly (for Return) *b To Exhaust Fuel Addition Injector
      *c From Fuel Tank Assembly (for Suction) *d To Common-rail Assembly
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      *1 Check Valve (for Suction) *2 Plunger
      *3 Eccentric Camshaft *4 Check Valve (for Discharge)
      *5 Ring Cam *6 Eccentric Cam Portion
      *7 Feed Pump - -

  2. OPERATION


    1. Due to the rotation of the eccentric cam, the ring cam pushes plunger A upward as illustrated below. The force of the spring pulls plunger B (which is located opposite plunger A) upward. As a result, plunger B draws fuel in, and plunger A pumps fuel at the same time.

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