Question: What is the typical compression ratio range for a diesel engine? (MCAER 2018)
Options:
5:1 to 10:1
14:1 to 20:1
25:1 to 30:1
35:1 to 40:1
🔑Key Points:: Diesel Engine
✏️Processes involved:
-Reversible adiabatic compression (1-2)
-Constant pressure heat addition (2-3)
-Reversible adiabatic expansion (3-4)
-Constant volume heat rejection (4-1)
-Fuel: Diesel
-Air intake: Air alone is sucked into the cylinder during suction stroke
-Compression ratio: High (up to 24:1)
-Compression pressure: High (400-550 PSI)
-Compression temperature: High
-Cycle: Constant pressure cycle
-Fuel ignition: Heat of highly compressed air
-Combustion: Constant pressure
-Fuel injection: Injector, fuel injection pumps, and atomizers