The pump housing is made of cast aluminum, and contains the pumping mechanism, feed pump, governor mechanism, etc.
2.CAMSHAFT
The camshaft is supported by two tapered roller bearings, and driven by the engine crankshaft via timing gears and the automatic timer. The cam-shaft has cams (the same number as the cylinders of the engine) that actuate the plungers and a cam that actuates the feed pump.
3.TAPPETS
The tappets convert the rotational movement of the cams into the vertical movement of the plungers. Inner and outer rollers are installed where tappets contact cams to increase the bearing surface area.
4. LOWER SPRING SEAT
The lower spring seat supports a plunger spring that pushes the plunger downward, and is de-signed to allow the plunger to turn in the lower spring seat easily. There are two types of lower spring seat: the conventional type and the high-speed type, as shown below. Shims (or an adjusting bolt on the 2D engine) are provided between the lower spring seat and the tappet in order to allow the adjustment of the pre-stroke of the plunger for the No.1 cylinder (or the injection interval of the plungers of the other cylinders).
5. PUMP ELEMENTS
The cylinder is fixed inside the pump housing by a delivery valve holder. The control groove of the plunger acts as a relief for pressurized fuel for the termination of injection when the groove matches the feed hole in the cylinder. The driving face of the plunger fits into the slit of the control sleeve, which rotates the plunger in the cylinder in order to regulate the amount of injection.
6. CONTROL RACK
The control rack is connected directly to the governor, with the rack geared to the control pinion. A control sleeve is fixed to the control pinion by a screw, and they rotate as one. Because the driving face of the plunger fits into the slit of the control sleeve, when the sleeve rotates, the plunger rotates also. When the control rack moves to the right or left, the plunger rotates clockwise or counterclockwise.
You have provided all the information about inline pump components this technology is very supportive for diesel engines can you enlighten a little bit petrol engines and how are they different from diesel engines.
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