This document summarizes recent trends in turbocharger technology. It discusses how turbochargers use exhaust gases to drive a turbine and compressor, which increases engine power by forcing more air into the combustion chamber. New developments include using twin turbochargers or compound double turbines/compressors for higher efficiency. Variable geometry turbochargers can adjust the exhaust flow to drive the turbine and increase volumetric efficiency, expansion ratio, and output power. In summary, turbochargers improve engine performance through forced induction, and recent innovations aim to further optimize efficiency.

1. RECENT TRENDS IN TURBOCHARGER
M.KUMARASAMY COLLEGE OF ENGINEERING
(An AutonomousInstitution)
NAME:M.TAMILSELVAN NAME:G.THIRUMURUGAN
DEPT:MECHANICAL DEPT:MECHANICAL
YEAR:3rd YEAR YEAR:3rd YEAR
Email:tamimmech@gmail.com Email:selvanmmech@gmail.com
CONTACTNO: 8508584225 CONTACTNO:8675288995
ABSTRACT
 This paperdeals withhighlighting the
improvisationsin the working of an
recent trendsin Turbocharger.
TURBOCHARGER
 The basic working principleof
Turbochargeris"FORCED INDUCTION"
 The turbochargeris usedto increase
engine power.
 The Turbocharger isdrivenbyusing
exhaustgasfrominternal combustion
engine.
 The turbochargerhousingcontainsa
turbine andcentrifugal aircompressor
on the same shaft.
NEEDS OF A TURBOCHARGER
 Turbocharger are usedto increase
the volumetricefficiencyof the
engine byincreasingthe air-fuel
mixture enteringthe cylinder.
 Turbocharger are usedto decrease
the emissionof CO2.
TWIN TURBOCHARGER
 In twinturbochargerthere are two
turbochargerare usedforhigher
efficiency.
COMPOUND DOUBLE TURBINE
TURBOCHARGER
 In thisthere are two turbine are used
inturbochargerto attain higherrpm.
 COMPOUND DOUBLE COMPRESSOR
TURBOCHARGER
 In thisthere are two centrifugal air
compressorare usedin turbocharger
to attainhighpressure ratio.
GASOLINE TURBOCHARGER
 It providingmore low speedtorque,
transientresponse andpartial load
efficiency.
VARIABLE GEOMETRY
TURBOCHARGER
 The VGT withnowaste gate usesthe
exhaustenergytodrive the turbine,
whichin turn drivesthe compressor
to increase the volumetricefficiency
and increasingthe expansionratio,
poweroutput,OutputTorque.
 KEYWORDS: Forcedinduction, VGT,
Waste gate, CO2, ExpansionRatio,
volumetricefficiency.