Turbocharging the IC Engine

Turbocharging the IC Engine - Turbocharging the I.C Engine...

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Unformatted text preview: Turbocharging the I.C. Engine Guest Lecture for ME 444 Internal Combustion Engines Dr. Philip S. Keller BorgWarner Inc. Engine Systems Group Outline • Introduction • Turbochargers – Thermodynamic Analysis – Compressor – Turbine – Intercoolers • Benefits • Challenges • New Developments • Conclusions Introduction • History – 1885 and 1896, Gottlieb Daimler and Rudolf Diesel experiment with pre-compressing intake air – 1925 Swiss engineer Albert Buchi develops first exhaust gas turbocharger which increases power output by 40% – 1938 first commercial Diesel truck application by “Swiss Machine Works Sauer” – 1962 first production application of turbochargers in passenger cars - the Chevrolet Monza Corvair and the Oldsmobile Jetfire Introduction • History – 1970’s – first oil crisis and increasingly stringent air emission regulations lead to demands for higher power density as well as higher air delivery. Outcome -> virtually all current truck engines are turbocharged. – 1978 Mercedes-Benz puts the 300 SD into production marking the appearance of the first turbocharged Diesel passenger car – 1994 VW introduces the variable geometry turbo in their TDI Diesel engine significantly improving the transient response of the Diesel engine. Introduction – Engine Power • Why boost? Definitions 2 N/ V ρ η m SW a vol a = f f f m Q P η = V ρ m a a = fuel of rate flow mass fuel of value heating Q power P speed engine N me swept volu V efficiency c volumetri rate flow c volumetri V density air air of rate flow mass f SW a = = = = = = = = = f a a m m η ρ Introduction – Engine Power Power is basically a function of three things (listed in order of least expensive first): 1. Swept volume 2. Engine speed 3. Air density -> boosting = AFR Q N V P f f SW a vol 1 2 η ρ η Introduction – SI Engine Power Density Power Density for gasoline engines is basically a function of two things: 1. Engine speed – Possible for SI engines, but more expensive and somewhat less responsive 1. Air density -> boosting = AFR Q V P f f vol SW 1 2 η η N ρ a Introduction – Diesel Engine Power Density...
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This note was uploaded on 01/29/2012 for the course ME 444 taught by Professor Staff during the Fall '08 term at Michigan State University.

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Turbocharging the IC Engine - Turbocharging the I.C Engine...

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