DIESEL TECHNOLOGY. ENERGY AND POWER. Rudolf Diesel , inventor of the diesel engine.
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ENERGY AND POWER
Rudolf Diesel, inventor of the diesel engine.
1. Fuel Return Line
2. Fuel Injection Pump
4. Fuel Filter
5. Fuel Tank
6. Swirl Pot
7. Fuel Feed Line
The main difference between Diesel vs Otto Engine is:
The burning of the fuel.
cylinder and creates a stoichiometric homogeneous
mixture 14,7:1, which is ignited and the flame travels from the
spark and outwards to the liner.
self-ignites and burns with a diffusion type of
combustion (Air/Fuel Ratio of 40:1)
• Compression ignition:
(intakes air, compresses it, then injects fuel)
• Fuel injection:
• Glow plugs:
when the engine is cold
- Pure air is drawn into the cylinder
- The air is compressed to
- high temperature and pressure (14:1 to 23:1)
- Around TDC fuel is injected, which self-ignites
- and burns, further increasing pressure and
- thereby forcing the piston down.
- The hot gas is released to the surrounding
Function of governor:
Automatically controls the engine speed and output by adjusting the fuel injection quantity in accordance with the load on the engine, and the amount that the accelerator pedal is depressed.
Indirect-Injection Engine (IDI)
In this design, the fuel is injected into a small pre-chamber attached to the main cylinder chamber.
The combination of rapidly swirling air in the pre-chamber and the jet-like expansion of
combustion gases from the pre-chamber into the cylinder enhances the mixing and combustion
of the fuel and air.
Starting is aided by a high compression ratio (24-27) and a glow plug mounted in the pre-chamber.
This design has the advantage of less noise and faster combustion, but typically suffers from poorer fuel economy.
Each injector sprays atomized fuel in to the combustion chamber to insure complete combustion
“Fuel return to tank”
2. Pressure adjusting
3. Pressure spring
4. Injector body
5. High pressure fuel
6. Pressure pin
7. Needle valve
8. Nozzle retaining nut
Function of the glow plug:
3 Filter element
4 Water drain plug
5 Cover plate
7 Supporting tube
8 Water accumulation
Combustion Chambers (where the fuel is burnt)
In the C.I. engine the fuel is injected into
the combustion chamber, it the has to mix
thoroughly with the air, ignite and burn all at
the same time. To insure this happens, two
types of combustion chamber have been
1 Multihole injector
2 ω piston recess
3 Glow plug
1 Fuel tank
2 Resupply pump
3 Fuel filter
4 In-line fuel-injection
6 Overflow valve
7 Overflow restriction
___ Supply line
----- Return line