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Q1: A six-cylinder SI engine has a swept volume of 4.2 liter operates on a four- stroke cycle at 2400 rpm. At this condition,

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Q1: A six-cylinder SI engine has a swept volume of 4.2 liter operates on a four- stroke cycle at 2400 rpm. At this condition, 900 J of indicated work per cycle per cylinder is produced. Mechanical and volumetric efficiencies of the engine are 65% and 90% respectively. The air-fuel ratio is 13:1 and the calorific value of the fuel is 44 MJ/kg. The air is inducted at 20 C and 1 bar. Calculate: (1) "imep" in bar, (2) "bmep" in bar, (3) "W," in kW, (4) "T" in N.m, (5) "th,b" in percentage, and (6)

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