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Oil pump is a kind of light and compact pump, there are three categories of in-line type, distribution type and single type. The oil pump must have a power source to operate, and the camshaft under it is driven by the engine crankshaft gear. It can be manufactured by CNC engraving, sand casting, transparent acrylic(PMMA/PC) 3D Printing.
Fuel control
In order to meet the requirements of the diesel engine load, the fuel supply of the fuel injection pump must be able to adjust within the range of the maximum fuel supply (full load) to the zero fuel supply (stop). The adjustment of the fuel supply is realized by the tooth rod and the rotating sleeve to make all the plungers of the fuel injection pump rotate at the same time. When the plunger rotates, the oil supply start time is unchanged, and the oil supply end time is changed due to the change in the position of the oil return hole of the plunger sleeve on the bevel side of the plunger. With the different Angle of rotation of the plunger, the effective stroke of the plunger is different, and the oil supply is also changed.
The greater the Angle of rotation of the plunger for no oil supply level 1, the greater the distance between the upper end face of the plunger and the hypotenuse of the oil return hole of the open plug sleeve, and the greater the oil supply. If the Angle of rotation of the plunger is small, the oil cut-off starts earlier and the oil supply is smaller. When the diesel engine is stopped, the oil must be cut off. For this reason, the longitudinal groove on the plunger can be turned to the oil return hole directly opposite the plunger sleeve. At this time, in the whole plunger stroke, the fuel in the plunger sleeve has been flowing back to the oil channel through the longitudinal groove and the oil return hole, there is no oil pressure process, so the oil supply is equal to zero. When the plunger rotates, the time to change the oil supply end point is used to adjust the oil supply, which is called the oil supply end point adjustment method.
The oil supply of the oil pump should meet the needs of the diesel engine in various working conditions, according to the requirements of the diesel engine, the oil pump should ensure that the oil supply of each cylinder starts at the same time, that is, the oil supply advance Angle is consistent, should also ensure that the oil supply duration is the same, and the oil supply should start quickly, stop the oil quickly and neatly, to avoid dripping. Depending on the form of the combustion chamber and the method of mixture formation, the oil pump must provide fuel with sufficient pressure to the injector to ensure good atomization quality.
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