ENGINE PERFORMANCE


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ENGINE PERFORMANCE
ENGINE PERFORMANCE
Basic Characteristics of SI and Diesel Engines As will by now be apparent, the ignition and combustion processes in gasoline-fueled spark-ignition engines, and in diesel-fueled diesel engines, are fundamentally different. Gasoline SI engines (unless in lean stratified mode) operate with a largely premixed fuel-vapor/air mixture (usually stoichiometric) that burns through a propagating turbulent wrinkled-laminar flame. The phasing of combustion relative to the piston's motion (determined by the crank angle of spark discharge) is usually close to that which gives the maximum brake torque (MBT) or minimum fuel consumption. Load (torque) is usually controlled by changing the intake system pressure thro…
Citation
John B. Heywood: Internal Combustion Engine Fundamentals, Second Edition. ENGINE PERFORMANCE, Chapter (McGraw-Hill Professional, 2018), AccessEngineering Export