Flashcards
Diesel
Cards in this deck (17)
- 1Compression Ratio SI10:1
- 2Compression Ratio CI Engine18:1
- 3Why is diesel better?1. high cycle efficiency
2. high combustion efficiency (lean)
3. high durability
4. Wide size range - 4What does combustion engines strive to achieve1. Power
2. Efficiency
3. Durability - 5What does high flame temp in CI engine causeHigh levels of NOx
- 6What is the energy density (LHV) of batteries compared to gasolineBattery: 2.8 - 3 MJ/Kg
Gasoline: 43 MJ/Kg
This is due to gasoline not having to carry around oxygen - 7What is the octane level of pure methane (CH4)Octane: 116
Used for high compression ratio and early spark timing - 8Jet engine burn temperature1600 Celsius which creates low NOx emissions
- 9At what temperature will soot be destroyed550 degree Celsius for 30 minutes
- 10Gasoline vs diesel emissionsDiesel produces more emissions but is a more efficient fuel
- 11Diesel Trucks use how many stages of turbochargingTwo stages are typically used in heavy duty truck applications
- 12BMEP pressure diesel vs gasoline vs new gasolineGasoline: 10 Bar
Diesel: 20 Bar
New Gasoline: 35 Bar - 13What company makes prototype enginesAVL
- 14Exhaust temperature gasoline vs dieselGasoline: 800 - 1000 Celsius
Diesel: 120 - 600 Celsius - 15Polytropic indexPV^n=constant
(p1/p2)=(v1/v2)^n
ln(p1/p2)=nln(v2/v1) - 16What is IMEP(PV Work per cycle)/(swept volume per cylinder)
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- Flashcards on Diesel, created by anthony cote on 23/06/2017.
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- anthony cote
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