A Method for Estimating the Transient Response Time of Turbochargers

Abstract

The transient response of a turbocharger has an important influence on the performance of engine variable conditions. An accurate estimation of the transient response process time is necessary for variable condition control to improve the engine response characteristics. In this study, the effect of the key factors on the turbocharger response speed, such as the turbine inlet flow rate, temperature and rotor inertia is investigated. In addition, the relationships between the turbocharger response time with respect to the response process of the turbine inlet initial state flow rate, turbine inlet end state flow rate, turbine inlet temperature and rotor inertia show correlations. The predicted response time values obtained using the relationships in comparison to the simulated values within the calculation range of this study are within a 10% error.