Pressing the lever, the person does not directly increase the supply of fuel, but only changes the program of work for regulators, who have themselves alter the flow of a strictly defined depending on the number of revolutions, the pressure boost lever knob, etc. In modern marine diesel engine fuel injection equipment usually involves the use of fuel injection pump of two types: in-line and distribution type. Inline pumps are currently more common result of their design are the most reliable. Less common distribution type fuel injection pump. In these high pressure fuel pump injection system has a single plunger pair – dispenser, which was making translational motion for the discharge of fuel and the rotational distribution for the fuel injectors. Pumps of this type are widely used in diesel passenger cars and small diesel generators. They compact, have high uniformity of fuel in the cylinders and the excellent work at high speeds through speed regulators.
At the same time, these pumps are very high requirements for cleanliness and quality of diesel fuel: for all their parts are lubricated with fuel, and gaps in high-precision elements are very small. Since the early 90-ies has introduced an electronic control system of a diesel engine, allowing to optimize fuel delivery in all modes and due to this increase efficiency, reduce emissions and noise of the engines. The use of electronics in the fuel system, allows you to replace all of the types of pumps complex mechanical adjustments easier and more accurate. Injection of the fuel injection pump at the same time usually remains unchanged. Another important element of the fuel system is the nozzle and tube pressure. They, along with a high pressure pump provides the supply is strictly metered amounts of fuel into the combustion chamber.
Adjusting the opening pressure of the nozzle determines the operating pressure in the fuel system, high-bandwidth pipes pressure determines the uniformity of the fuel metering, and the type of nozzle determines the shape of jet fuel, which is essential for the process of ignition and combustion. Are usually used two jets types: with or shriftovym mnogodyrchatym distributor. The nozzle on the engine operates in very difficult conditions: needle spray makes reciprocating motion with a frequency in half less than the turnovers engine, and at the same gun in direct contact with the combustion chamber. Therefore, the spray nozzles are made of heat resistant materials with high accuracy and precision is an element.