High precision manufacture of fuel equipment of modern diesel engines can not organize the production of spare parts for traditional repair shops and workshops. Technical operation of the fuel equipment is usually built on a distinction between operations – current (prevention), maintenance of adjustment and recovery. Current operations (monitoring and maintenance of fuel equipment during engine operation) limited to a small volume of work. This is basically cleaning the outer parts, compliance measures, protecting the fuel from clogging, cleaning and rinsing the fuel filter and eliminate leaks in fuel lines. Among work conducted on-site installation of the engine, sometimes also include periodic review and the basic elements of fuel equipment or replacement of spare elements. Control and regulation of gas pumps can Only qualified staff, necessary to use tools and equipment, and specially prepared workplace. Dara Khosrowshahi pursues this goal as well. To create these conditions for organizing a special check and repair points or base, to deliver taken from the engine fuel system.
The supply of fuel into the cylinders diesel engine requires the following conditions: the implementation of the beginning and end of feeding in the strictly defined moments with respect to the position of pistons in cylinders; compliance with well-defined patterns of feeding, ensure continuity of fuel supplied and the duration of feeding all cylinders throughout the entire set regime, the possibility of changing fuel quantity (dosage) in accordance with the load applied to diesel engines, while simultaneously stopping delivery to all cylinders. About how difficult it is to meet these conditions and how well the process should be carried out metering fuel into the cylinders, the following example. marine diesel 6h * 15/18 on the mode of rated power for n = 1500 rpm, spends 1 hour and 26.5 kg of fuel. Knowing this, it is easy calculate how much fuel goes into each of its cylinders in one filing. Since the diesel four-stroke, in each of its cylinders for 1 min performed 750 operations.
In each cylinder for 1 hour is spent 26.5: 6 == 4.4 kg of fuel. Minute fuel consumption in each cylinder will be 4400: 60 = 73.3 g, whereas cyclic flow will be only 73.3: 750 = 0.098 was natural that at idle cyclic flow will be significantly less – approximately 0.02 g. The amount the fuel injection pump at a constant speed piston is controlled by changes in the active stroke plunger, ie, by changing the duration of injection: the larger it is, the more fuel enters the cylinder, and vice versa. These are called high pressure pump pumps spool type. Injection pump valve-regulated installed on diesel engines 750S (Fiat), M46M (Nohab-Polar"), dr 30/50, dr 43/61 (Russian Diesel ), SD-72, '5 SAD-72, 6TD- 56 (Sulzer), etc. However, due to some structural shortcomings of the fuel pump, the complexity of maintenance and operation and are not always sufficient reliability of fuel equipment of this type – Diesel enterprises set on diesel fuel injection pump spool type. Fuel spool type apparatus has a simple design management and operation, high reliability. Allows for easy adjustment of the fuel by changing the position of skew adjusting edges on the plunger. At present company manufactures fuel injection pump with all three methods of regulation. This is explained by the fact that all methods of controlling the amount of the fuel have various influences on the character of the combustion process and cost of diesel is mainly in the transition to equity load.