Inline fuel injuction pump

This slides are about inline injection pump and calibration of the pumps .The working of the pump is described in simple words and with examples of daily usable devices.

1. INLINE FUEL INJECTION PUMP BY:JOHNS JOSEPH

2. FUEL INJECTION PUMP An  Injection Pump  is the device that pumps diesel (as the fuel) into the cylinders of a  diesel engine.   The injection pump is driven indirectly from the  crankshaft  by gears, chains or a toothed belt (often the  timing belt) that also drives the  camshaft.  It rotates at half crankshaft speed in a four stroke diesel engine. Its timing is such that the fuel is injected only very slightly before  top dead center  of that cylinder's compression stroke . The  injection pressures can be as high as 200  MPa (30,000 PSI ).

3. INLINE FUEL INJECTION PUMP

4. MAIN PARTS

5. WORKING Plungers and plunger sleeves are very precise parts. There is a inclined slot on the body of plunger and a suction on the plunger sleeve .  The suction is filled with diesel fuel. The diesel fuel flow into the plunger sleeve when the inclined slot of the plunger is on the suction .  the plunger is pushed higher by the camshaft. When it reaches some certain height, the inclined slot will stagger away from the suction and the latter will be closed . In this situation, diesel fuel can not move any more while the plunger rising higher and pressing the diesel fuel. Once the pressure on the fuel reaches a certain range, then the one-way valve will be pushed open .  Hence the fuel will flow through fuel injection nozzle and enter into cylinder combustion chamber .

6. WORKING Power source is needed when operating fuel injection pumps. Cam disks at the lower parts of pumps are driven by crankshaft gears of engines.   A plunger is the key component of a fuel injection pump. Taking medical injectors as an example then the removable plug is similar to the plunger and the cylinder can be called as a plunger sleeve .  Assembling a spring inside of the cylinder on one side of plunger, therefore the other side will touch the camshaft. Plungers will move up and down inside of plunger sleeves each time the camshafts rotate for one round . This is the basic motion of fuel injection pump plunger.  

7. CALIBRATION OF FUEL INJECTION PUMP It is  important that an equal amount of fuel is  delivered to  each engine cylinder and at the correct time Pumps are checked for leaks, tested & calibrated to assure proper delivery and performance. Results are compared against master pumps to assure accuracy & quality .

8. CALIBRATION OF FUEL INJECTION PUMP BY TEST BENCH

9. THANKYOU