Transcription of UNIT 7 IC ENGINE TESTING IC Engine Testing - IGNOU
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UNIT 7 IC ENGINE TESTING IC Engine Testing - IGNOU
79 IC ENGINE TESTING unit 7 IC ENGINE TESTING Structure Introduction Objectives Performance Measurements Basic Parameters Measurement of Speed Fuel Consumption Measurement Measurement of Air Consumption Measurement of Exhaust Smoke Measurement of Exhaust Emission Measurement of Brake Power Measurement of Friction Horse Power Blowby Loss Performance of SI Engines Performance of CI Engines Summary Key Words Answers to SAQs INTRODUCTION At a design and development stage an engineer would design an ENGINE with certain aims in his mind. The aims may include the variables like indicated power, brake power, brake specific fuel consumption, exhaust emissions, cooling of ENGINE , maintenance free operation etc.
Power and Mechanical Efficiency The main purpose of running an engine is to obtain mechanical power. • Power is defined as the rate of doing work and is equal to the product of force and linear velocity or the product of torque and angular velocity. • Thus, the measurement of power involves the measurement of force (or torque) as well as speed.
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