High-level phlegmatization of an ICE for the use in a series hybrid powertrain

Abstract

The electrification of power trains offers high potential for fuel savings. Furthermore, the use of a series hybrid technology allows simplifying the internal combustion engine due to fewer requirements concerning dynamics, power, and torque – it is possible to phegmatize the internal combustion engine. In this project a simulation model of a series hybrid is presented where an internal combustion engine is only working as a generator. The basic engine is a 4-cylinder direct injecting turbocharged spark-plug engine. Variable valve-timing as well as throttle and wastegate control are removed. The internal combustion engine is only working at its optimum point. Phenomenological thermal models of the engine and the transmission are presented. Furthermore, thermal models of the electrical components were developed. A thermal management system is shown as well as a hybrid operating strategy. The power train model is calculated in the WLTC and fuel savings are investigated.