Transient tests in a 2.0 liter in-line 4 cylinder downsizing gasoline direct injection engine were conducted under various transient conditions in order to investigate effects of lower rotational inertia of titanium aluminide alloy (TiAl) turbine wheel on engine and turbocharger performances. As a representative result, fast boost pressure build up was achieved in case of TiAl turbocharger compared to Inconel turbocharger. This result was mainly due to lower rotational inertia of TiAl turbine wheel. Engine torque build up response was also improved with TiAl turbocharger even though engine torque response gap between both turbochargers was slightly reduced due to retarded combustion phase. In addition, with advanced ignition timing, fuel consumption became less than that of Inconel turbocharger with similar engine torque response.
Effects of High-Response TiAl Turbine Wheel on Engine Performance under Transient Conditions
Sae Technical Papers
JSAE/SAE 2015 International Powertrains, Fuels & Lubricants Meeting ; 2015
01.09.2015
Aufsatz (Konferenz)
Englisch
Characteristics of Turbocharger with TiAl Turbine Wheel in a Downsizing GDI Engine
SAE Technical Papers | 2013
|Characteristics of Turbocharger with TiAl Turbine Wheel in a Downsizing GDI Engine
British Library Conference Proceedings | 2013
|Engine transient performance or why inertia wheel testing
Engineering Index Backfile | 1957
|ENGINE TRANSIENT PERFORMANCE OR WHY INERTIA WHEEL TESTING
SAE Technical Papers | 1957
|