Study of the Impact of E-Machine in Hybrid Dual Clutch Transmission Powertrain

Irfan Khan, Sanjarbek Ruzimov, Nicola Amati and Andrea Tonoli
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Irfan Khan: Center for Automotive Research and Sustainable Mobility, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Turin, Italy
Sanjarbek Ruzimov: Center for Automotive Research and Sustainable Mobility, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Turin, Italy
Nicola Amati: Center for Automotive Research and Sustainable Mobility, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Turin, Italy
Andrea Tonoli: Center for Automotive Research and Sustainable Mobility, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Turin, Italy

Energies, 2022, vol. 15, issue 3, 1-19

Abstract: Recent studies show that hybrid powertrains with dual clutch transmission are becoming more common. This is mainly influenced by the fact that they have higher efficiency, allow power-on shifting, and are more compact. However, the electric motor attached to the primary shaft of the transmission might represent some critical issues in statics and dynamics due to additional torque, inertia, and working irregularities. This paper aims to investigate the influence of the electric motor integration in the transmission on the reliability of the overall system. The focus is on the investigation of potential over stresses of the ICE bearings due to the bending of the gearbox primary shaft. To achieve the aim, the static and the rotor dynamic analysis of the inner and outer primary shafts is performed. The numerical analyses show the potential critical issues that can arise from the excessive manufacturing and assembling tolerances, the interaction of the e-machine torque irregularities and inertia with the bending dynamics of the primary shafts.

Keywords: hybrid electric vehicle; dual clutch transmission; hybrid dual clutch transmission; static deflection; rotor dynamics; dual mass flywheel; finite element method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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