IGTC-117 An Experimental Study on a Turbocharged Engine for a Passenger Car(Organized Session VI AUTOMOTIVE TURBOCHARGERS)

概要

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The effects of inertia moment of turbine rotor, turbocharger efficiency and turbocharging systems on transient response of a turbocharged engine have been studied experimentaly. A ceramic rotor which reduced the inertia moment by 60%, compared to a metal rotor, has been developed. The ceramic rotor has been evaluated to be contributable to reduce response time more than 30%. Abradable coatings on the wall of compressor housing have improved turbocharger efficiency by 4% which was evaluated to reduce response time by 10%. The twin-entry turbocharger system has achieved a 20% torque improvement in the lower engine speed range, and reduced response time by 25%. The effect of exhaust manifold volume on the engine performance was studied. A volume reduction of 50% from the original design has improved output torque by 20% at the engine speed of 2000rpm, which was about equivalent to the effect of the twin-entry turbocharger system.
公益社団法人日本ガスタービン学会の論文