The Plunger fuel injecton pump is made up of pump fuel mechanism,fuel supply adjusting mechanism a drive mechanism and pump body.
1. Pump fuel mechanism includes plunger,plunger barrel,upper and lower plunger seat,plunger spring (plunger couple) and delivery valve, delivery valve seat,lock.(delivery valve couple).
The plunger adopts alloy steel material,the gap is 0.0015-0.0025mm. If the gap is large, it leads to leakage fuel and fuel pressure is lower;if the gap is small, it may stuck.
Delivery valve couple is connecting to plunger couple,it run direct motion.
2. Fuel supply adjusting mechanism function is adjusting fuel supply volumn according to diesel engine load.is controlled by governor. gear type and level type.
3. Dirve mechanism include camshaft and tappet. the camshaft is fixed up the bearing seat on the pump,the cam Qtys is the same as plunger.the camshaft is drived by crankshaft timing system, the tappet is fixed on inner pump body. In addition, in contain adjusting screw,locked nut,gasket, shaft, and inner and outer roller.
4. Pump body is basic part, all of parts is installed on pump body or inner. So the pump body have good intensity, stiffness.good seal.