DIESEL ENGINE FUEL INJECTION PUMP DOWNLOAD
DIESEL ENGINE FUEL INJECTION PUMP DOWNLOAD!
The main types of injection systems include pump-line-nozzle, unit injector, and Unlike its spark-ignited engine counterpart, the diesel fuel injection system. A fuel injection pump is a very complex piece of engineering. Each one is calibrated to deliver just the right quantity of fuel via the fuel injector into the. Basic diesel fuel system. - A lift pump takes fuel from the tank and keeps the injection pump full with fuel (electric or mechanical, on the engine or on the injection.
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How diesel fuel injection system works
Inline-injection Jerk Pumps The first pumps to use plungers to force metered fuel to the combustion chamber were developed back in the s.
It took almost forty years, but in Bosch introduced the mass-produced helix-controlled inline pump.
Sometimes diesel engine fuel injection pump jerk pumps, they are constructed from separate pump and plunger units connected inline, one per cylinder. They are activated by a cam, which is mechanically connected to the engine. Fuel must be injected at the proper time, that is, the injection timing must be controlled and The correct amount of fuel must be delivered to meet power requirement, that is, injection metering must be controlled.
Diesel Injection Pumps - How It Works
However, diesel engine fuel injection pump is still not enough to deliver an accurately metered amount of fuel at the proper time to achieve good combustion.
Additional aspects are critical to ensure proper fuel diesel engine fuel injection pump system performance including: Fuel atomization—ensuring that fuel atomizes into very small fuel particles is a primary design objective for diesel fuel injection systems. Small droplets ensure that all the fuel has a chance to vaporize and participate in the combustion process.
Any remaining liquid droplets burn very poorly or are exhausted out of the engine. While modern fuel injection systems are able to produce fuel atomization characteristics far exceeding what is needed to ensure complete fuel evaporation during most of the injection process, some injection system designs may have poor atomization during some brief but critical periods of the injection phase.
The end of the injection process is one such critical period. Bulk mixing—While fuel atomization and complete evaporation of fuel is critical, ensuring that the evaporated fuel has sufficient oxygen during the combustion process is equally as important to ensure high combustion efficiency and optimum engine performance.
The oxygen is provided by diesel engine fuel injection pump intake air trapped in the cylinder and a sufficient amount must be entrained into the fuel jet to completely mixed with the available fuel during the injection process and ensure complete combustion.
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diesel engine fuel injection pump Air utilization—Effective utilization of the air in the combustion chamber is closely tied to bulk mixing and can be accomplished through a combination of fuel penetration into the dense air that is compressed in the cylinder and dividing the total injected fuel into a number of jets.
A sufficient number of jets should be provided to entrain as much of available air as possible while avoiding jet overlap and the production of fuel rich zones that are oxygen deficient.
The primary purposes of the diesel fuel injection system are graphically represented in Figure 1.
Main Functions of Diesel Fuel Injection System Definition of Terms Many specialized concepts and terms are used to describe the components and the operation of diesel fuel injection systems. The timing is precisely set according to the model of engine it services, so that the fuel injection pump introduces the right volume of diesel into the cylinder chamber only a fraction of a second diesel engine fuel injection pump the cylinder reaches the top dead centre position of its compression stroke.
This ensures the fuel only becomes available from the fuel injector at the critical point of the cycle.
Diesel Fuel Injection
It uses a single injection cylinder driven from an axial cam plate, which injects into the individual fuel lines via a rotary distribution valve. Later incarnations such diesel engine fuel injection pump the Bosch VE pump vary the injection timing with crankshaft speed to allow greater power at high crank speeds, and smoother, more economical running at slower revolution of crankshaft.
Some VE variants have a pressure-based system that allows the injection volume to increase over normal to allow a turbocharger or supercharger equipped engine to develop more power under boost conditions. The injector atomizes the fuel for proper combustion.
Rotary type distributor pump Fig. Inline distributor pump injection system Fig. Rotating the pump plunger meters the amount of fuel delivered to the cylinder The individual control pump system use a separate high pressure diesel engine fuel injection pump and metering unit for each cylinder.
The high pressure pumps are fed fuel from a transfer pump.