5
‘Among the different type of combustion chambers, the peak pressure is the lowest for the
EXPLANATION
Biomass Fuel Characterization
- Peak Combustion Pressure in Diesel Combustion Chambers:
- Precombustion Chambers (Indirect Injection - IDI) divide the combustion space into a small prechamber (20–40% volume) and a main chamber above the piston.
- Fuel injected into the prechamber ignites with limited oxygen, forcing rich, partially burned gases through an orifice into the main chamber, where complete burning occurs progressively.
- This two-stage progressive burning cushions the pressure rise and produces the lowest peak cylinder pressure and lowest rate of pressure rise compared to open (direct injection) chambers.
- Conclusion: Peak pressure is lowest for Precombustion chamber (Option 2).
Correct option: (2) Precombustion chamber
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