과급된 직접분사식 가솔린 엔진에서의 과도응답 특성 및 경량 TiAl 터빈 휠의 효과 분석

Abstract

In this study, performance tests were conducted under transient operation conditions in a turbocharged gasoline direct injection engine. In order to improve transient response, which is one of drawbacks of downsized engines, TiAl turbine wheel was evaluated compared with conventional Inconel turbine wheel. The inertia of TiAl turbine wheel is lower than that of Inconel one. Therefore, transient response was improved with TiAl turbine wheel because of that turbocharger speed of TiAl turbocharger was increased faster compared to Inconel turbocharger.