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The power supply system of diesel engine
The power supply system of the diesel engine must be created VAT high pressure fuel injection into the combustion chamber cylinder; a metered portion of fuel in accordance with the load of the engine; to make fuel injection in a strictly certain point within a given period of time menny and with a certain intensity; good spraying and evenly distribute the fuel on the chamber volume the CDF Rania; reliably filter the fuel before its revenue to t- eat in the pumps and injectors. Diesel fuel is a mixture of kerosene- o, gas oil and straw fractions after extraction from non- PTI gasoline. The main properties of diesel fuel include: flammable, estimated octane number scrap; viscosity; clean and pour point by which eye distinguish diesel fuel grades: L — summer, DZ — winter, YES — Arctic. The power supply system of the diesel engine is from: • fuel tank; • coarse filter and fine filter air; • fuel priming pump; • fuel high-pressure pump with regulator speed and automatic clutch, operage- of fuel injection; • nozzles; • pipelines of high and low pressure; • the air filter; • the exhaust pipe; • silencer of exhaust gases. The power supply system of diesel engine is divided into fuel - and who- bhopalwala equipment. The greatest distribution received feed apparatus of separate type, when the fuel pump and injectors done separately. Fuel supply is via two highways: low and high pressure. The purpose of the trunk bottom whom pressure is in the fuel storage, filtration and flow under low pressure to the fuel pump high who pressure. The appointment of a mainline high pressure is to provide a feeding and injection need th amount of fuel to the engine cylinders in a strictly divided by the time. Fuel pump diesel engine delivers fuel from tank through the filters of rough and fine cleaning at no deformation after- waters low pressure fuel pump high pressure tion (fuel pump), which is in accordance with the order of the cylinders for high pressure fuel lines delivers the fuel to the injectors. Injectors located in the heads tion of the cylinders, inject and atomize the fuel in Cham- ry combustion engine. As fuel for- SOS delivers the fuel to the injection pump more than necessary, it excess and trapped air to the system, the drainage- tion pipelines is diverted back into the tank. Fuel high-pressure pump is used to supply in the combustion chamber of the engine through the nozzle of the required por functions of the fuel. Consists of identical sections (Fig. 35) the number of cylinders of the engine. The section consists of : • the housing; • bushing plunger (sleeve); • plunger; • rotary bushings; • the injection valve, pressed fitting to the sleeve of the plunger through the strip. Under the action of the Cam and shaft spring plunger Sauveur- than reciprocating motion. When moving the plunger downward inner space the sleeve is filled with fuel, and simultaneously, it delivers the- by the low pressure pump into the supply channel of the housing pump. This opens the inlet port, and Topley- in mudpluggers enters the space. Then under dei by the action of the Cam plunger begins to rise up, re- letting fuel back into the inlet channel, as long while the upper edge of the plunger closes the inlet hole is part of the liner. After the blocking of the orifice pressure fuel consumption increases dramatically and the fuel through the gap between the kids long- tion and the plunger is about one micron, overcoming Wuxi Leah spring, lifts the discharge valve and the post- Paet in the fuel line. Further movement of the plunger up calls on- the elevated pressure above the pressure created spring nozzle, causing the nozzle needle at- rises and the injection of fuel into the chamber combustion. The flow of fuel continues until, until the helical edge of the plunger will not open the outlet openings in the liner. As a result, the pressure above the plunger sharply pada- no, the discharge valve under the action of the spring. - out and mudpluggers space can be separated from top liopropoma high pressure. Upon further motion the research Institute of the plunger fuel will flow up into the drain channel through longitudinal groove and a helical edge of the plunger. The amount of fuel supplied to the injector control be assured by rotation of the plunger -using a serrated rails, bushings and binding leash. Depending on the angle of rotation of the plunger changes the distance traveled by the plunger from the time the overlap inlet prior to opening screw chrome- koi outlet. As a result changes Pro- expectancy the injection of appropriate portions fuel supplied to the cylinders of the engine. To stop the engine it is necessary to stop the supply fuel. To do this, set the plunger rod in such the situation to spiral grooves was drawn to the outlet. In this case, when you move plug up all the fuel above it along the groove through you- exhaust (shut-off) hole and the fuel goes in tank. Variable-speed control in speed automatically Cesky maintains the frequency of rotation of a cranked- th shaft. The controller is in the collapse of the housing Injection pump and is driven from the Cam shaft. During operation of the engine with frequency of rotation of the knee catego shaft corresponding to the pedal position management of fuel supply, centrifugal force weights the regulator is balanced by the force of the springs. If the load on the engine decreases (downhill), speed the crankshaft starts to increase and the cargo controller, pre overcoming the resistance of the spring, some will disperse and moves the injection pump rack to a position that reduces pod- Chu fuel. If the rotational speed decreases, the center- the power of foreign goods is also reduced and the regulator under the dei- the effect of the force of the spring moves the rake in a reverse direction lenny, then the fuel delivery will increase. Automatic injection timing top Liva is designed to change the beginning fuel injection depending on the rotational speed crankshaft that provides improved starting qualities of the engine and its efficiency. Driven half coupling is mounted on a conical surface- t the front end of the Cam roller fuel pump key lock nut, and the leading coupling half on the hub in home (and can turn on it). Between the hub and the coupling sleeve is installed. Leading coupling half when- found in the action distribution sixth interim- Terney via a shaft with flexible couplings. On the driven coupling half rotation is transmitted two goods. |
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