##### Question

In: Mechanical Engineering

# A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke...

A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke =11 cm. the crank radius is 6.2 cm and with a connecting rod length 15 cm. the compression ratio of the engine is 20 and the combustion efficiency is 97.3 %. If the average speed of the car over the running life of the engine is 56 km/h and the total traveled distance of the engine is 250000 km. note: use the engine speed as 2300 rpm whenever needed, mechanical efficiency is 73 %, indicated work produced from each cycle each cylinder is 1400J, and assume that the injection started 10 degrees bTDC and ends at 25 crank angle degree aTDC.

Determine:

1. The volume of the BDC.
2. The amount of the fuel that didn’t burned in the combustion chamber .
3. The rate of the air flow to the engine if the volumetric efficiency is 70 %.
4. The number of the exhaust strokes that have been happened during the engine life in one cylinder.
5. Indicated mean effective pressure.
6. The torque produced from the engine.
7. The time duration for the injection process.
8. The position of the piston at the end of the injection period.
9. The volume of the combustion chamber at the moment of the injection process.
10. If the mass floe rate of the fuel used if A/F is 19.3 kgair/kgfuel.
11. The specific power of the engine.
12. Based on the dimensions of the bore and the stroke, is this engine square engine or over or under square one?

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