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Direct fuel injection
With direct injection, fuel is supplied directly into the combustion chamber. The fuel pump supplies fuel at a pressure of about 900 bar and the fuel injection is performed in two stages.
Using a dual fuel injector makes it possible to produce an initial injection of a small part of the fuel, thereby improving combustion of fuel, and the combustion process proceeds more smoothly. The amount of injected fuel is regulated by the electronic engine management system.
The amount of fuel injected is regulated by a control system based on information from the following sensors:
- The accelerator pedal sensor. Accelerator pedal position sensor transmits the information to the engine control unit of the position of the accelerator pedal at the present time;
- The gauge of turns of the crankshaft of the engine;
- Motion sensor fuel injector needle. Based on information from this sensor is determined by the fuel injection timing and the injection process is adjusted depending on the operating conditions and revolutions of the engine crankshaft;
- A pressure sensor to the engine air (boost gauge);
- Temperature sensor at the engine air inlet;
- Coolant temperature sensor;
- Temperature sensor of diesel fuel;
- Potentiometer spool position. Based on information from this sensor is determined by the actual injection quantity.
The air entering the engine in the intake ducts, spirals, resulting in improved combustion process in the cylinders of the engine. Also in this case easier cold start and preheat the engine must be carried out at ambient temperatures below -10 ?� C.
Before entering into the fuel injection pump the fuel passes through a fuel filter, in which it also separates from the water, which must be drained periodically.
Drive a fuel pump is driven by the engine crankshaft via a toothed belt. The internal moving parts are lubricated by the fuel pump diesel.
A warning  Do not spill diesel on the cooling hoses. Hoses for which long influenced diesel fuel must be replaced.
The fuel system of the diesel engine is particularly sensitive to pollution, so when working on the fuel system, observe maximum cleanliness. Before disconnecting the fuel thoroughly clean them from dirt.
Do not use compressed air to clean the fuel system components installed on the engine.
A warning When testing the operation of fuel atomizers never substitute hands or any part of the body under the stream of fuel coming out of the nozzle. Fuel exits the injector at high pressure can penetrate into the body through the skin.
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