Development of New Plug-In Hybrid System for C-Segment Vehicles

Autoren

Takashi Uehara, Shinji Ichikawa, Hiroaki Takeuchi, Shigeru Fukuda,
Shigeki Kinomura, Yoshiki Tomita, Yosuke Suzuki, Takahiko Hirasawa,
Toyota Motor Corporation, Toyota-shi, Japan

Zusammenfassung

The new plug-in hybrid system installed in the latest Prius PHV is based on the TOYOTA Hybrid System II (THS II), while electric driving performance is greatly enhanced from the original THS II for the current Prius. Environmental performances of the vehicle, the electricity consumption and fuel consumption, are top level in
midsize cars. In order to realize it, several units and systems are newly developed.

The high capacity Li-ion battery was developed for long electric driving range and high electric driving power. A one-way clutch was installed for the transaxle in order to allow both motor and  generator to provide work for vehicle driving. Additionally, the power control unit (PCU) is strongly enhanced to realize high electric output power from the Li-ion battery, which then translates through appropriate driving force control to a good electric driving feeling.

The battery warming system was developed to realize keeping good battery temperature under lower temperature. Cabin comfort is ensured by a heat pump climate system, allowing to realize a good electric driving range also in cold condition.

As for charging, the power of the new charger is 1.6 times compared to the previous one in order to decrease the charging time. A timer allows during charging to activate the pre-climate system and the battery warming system, so that drivers can enjoy comfortable and powerful driving from the very beginning of their ride on the vehicle.

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