What is the specific brake work (kJ/kgfuel) of a 4 L single-cylinder propane engine operating stoichiometrically, if the heat transfer to the coolant is 17 kW, the air and fuel enter the engine at 298 K, the exhaust is 700 K, and the propane mass flow rate is 1.2 g/s? b. A four-stroke 6 L engine is fueled lean with methane at an equivalence ratio ? = 0.8. It operates at 2000 rpm with a volumetric efficiency of 0.80. The exhaust temperature is 800 K, and the heat transfer to the coolant is 3.4 ×105 kJ/kmolfuel. What is the engine’s thermal efficiency and power?

What is the specific brake work (kJ/kgfuel) of a 4 L single-cylinder propane engine operating stoichiometrically, if the heat transfer to the coolant is 17 kW, the air and fuel enter the engine at 298 K, the exhaust is 700 K, and the propane mass flow rate is 1.2 g/s? b. A four-stroke 6 L engine is fueled lean with methane at an equivalence ratio ? = 0.8. It operates at 2000 rpm with a volumetric efficiency of 0.80. The exhaust temperature is 800 K, and the heat transfer to the coolant is 3.4 ×105 kJ/kmolfuel. What is the engine’s thermal efficiency and power?

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter9: Automotive Engine Designs And Diagnosis

Section: Chapter Questions

Problem 3RQ: As an engines compression ratio increases, what should happen to the octane rating of the gasoline?

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