Problem An Automobile Has A Three Liter Si V6 Engine That Operates On A Four Stroke Cycle At 3600 Rpm The Compression 1 (85.51 KiB) Viewed 144 times
Problem: An automobile has a three-liter SI V6 engine that operates on a four-stroke cycle at 3600 RPM. The compression ratio is 9.5, the length of connecting rods is 16.6 cm, and the engine is square (BES). At this speed, combustion ends at 20 a TDC. Calculate; 1.Cylinder bore and stroke length 2.Average piston speed 3.Clearence volume of one cylinder 4.Piston speed at the end of combustion 5.Distance the piston has traveled from TDC at the end of combustion 6. Volume in the combustion chamber at the end of combustion
Willard P Problem 2-2: The engine in Example Problem 2-1 is connected to a dynamometer which gives a brake output torque reading of 205 N-m at 3600 RPM. At this speed air enters the cylinders at 85 kPa and 60°C, and the mechanical efficiency of the engine is 85%. Calculate: 1-brake power 2-indicated power 3-brake mean effective pressure 4-indicated mean effective 5-friction mean effective pressure 6-power lost to friction 7-brake work per unit mass of gas in the cylinder 8-brake specific power 9-brake output per displacement 10-engine specifc volume
Problem 2-3: The engine in Example Problem 2-2 is running with an air-fuel ratio AF = 15, a fuel heating value of 44,000kJ/kg, and a combustion efficiency of 97%. Calculate: 1. Rate of fuel flow into engine 2. Brake thermal efficiency 3.Indicated thermal efficiency 4. Volumetric efficiency 5.Brake specific fuel consumption
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