A single-cylinder, 4-stroke, 3-liter gasoline engine operates at 800 rpm and a compression ratio of 9. The pressure and temperature at the intake are 103 kPa and 30 °C respectively. The fuel used has a heating value of 42,500 kJ/kg, the air-fuel ratio is 14, and 82 % mechanical efficiency. The length of the indicator card is 60mm with an area of 520 mm² and the spring scale is 0.85 bar/mm, considering a volumetric efficiency of 95%, 25% excess air, and k = 1.37. Determine the Brake Engine Efficiency in (%). Note: Use four (4) decimal places.

A single-cylinder, 4-stroke, 3-liter gasoline engine operates at 800 rpm and a compression ratio of 9. The pressure and temperature at the intake are 103 kPa and 30 °C respectively. The fuel used has a heating value of 42,500 kJ/kg, the air-fuel ratio is 14, and 82 % mechanical efficiency. The length of the indicator card is 60mm with an area of 520 mm² and the spring scale is 0.85 bar/mm, considering a volumetric efficiency of 95%, 25% excess air, and k = 1.37. Determine the Brake Engine Efficiency in (%). Note: Use four (4) decimal places.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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