Diesel Injector Fuel Injector 0445120371 Bosch for Caterpillar excavator Perkins engines

General principles of nozzle design

The best organic matching of oil (fuel), gas (air) and chamber (combustor) is the key to improve diesel engine combustion process and p high technical and economic index, which is also one of the research contents of diesel engine workers. To achieve the above goals, as far as the injection system is concerned, in view of the specific situation and common working conditions of the diesel engine, in addition to the selection of the appropriate number of injection holes and aperture, the cone Angle between the injection holes, the distribution of the injection in the combustion chamber and the position of the drop point on the chamber wall (including their plane distribution and height on the combustion chamber wall > is also very important. It needs to be determined according to the size and shape of the combustion chamber and its offset in the cylinder as well as the direction and intensity of eddy current movement.

Direct injection high-speed diesel engines, intake valve disc diameter is often larger than the exhaust valve, coupled with the cylinder head manufacturing process and valve mechanism and fuel injector installation problems, the fuel injector is often a certain distance away from the center line of the cylinder, and is installed at a certain Angle with the center line of the cylinder. At the same time, the position of the combustion chamber in the piston top should not only take into account the offset of the injector, but also take into account the center of the rotational movement of the air flow in the cylinder, but also prevent the piston top from bearing uneven thermal stress due to the offset of the combustion chamber and the local heating and burning of the cylinder wall oil and other factors and reasonable selection.