Kazuhide Togai, Hiroki Yamaura(Mitsubishi Automotive Engineering Co, Naoto Fujinaga(Mitsubishi, Motors Corporation
Proceedings of SETC2015(Small Engine Technology Conference) SAE 2015-32-0766, pp. SAE 2015-32-0766, Nov, 2015 Peer-reviewed
A small turbocharged engine was tested to model the air transfer process. Turbine speed was measured with temperatures, pressures and air mass flow. Turbine speed response is like a first order system to air mass flow into a combustion chamber. The pressure ratio at the compressor is approximated by a curve proportional to the turbine speed square.
Based on those findings, a reduced order model for describing dynamic air transfer process with a turbocharger was constructed. The proposed model is compact and suitable for engine torque control design and controller implementation.