Diesel Engine Troubleshooting

Bosch Fuel Supply Pump Suction/Discharge Stroke

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On the suction stroke, the roller of the supply pump follows the camshaft inward because of the force of the plunger spring . As the plunger is moved inward, a low-pressure area is created. Atmospheric pressure then pushes fuel through the preliminary filter, past the suction valve, and into the suction chamber. At the same time, the opposite side of the plunger pushes fuel from the pressure chamber into the outlet line. The pressure in this line, varying from 14 to 28 psi (1 to 2 kg/cm2 ), depending on engine application, will close the pressure valve.

FP K transfer pump during the inlet stroke Bosch Fuel Supply Pump Suction/Discharge Stroke

Written by Ed

September 3rd, 2011 at 2:23 am

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