This chapter discusses various planetary‐geared electric variable transmission (PG EVT) systems for the full hybrids, including the system configurations and planetary gears as well as the input‐split and compound‐split planetary‐geared (PG) types. It presents the corresponding design criteria, design example, and application examples. The PG EVT system functions to offer electrically controllable power transfer from the engine to the wheels with continuously variable transmission, seamless torque transfer and smooth gear changing. There are two main input‐split PG EVT systems: one was developed by Toyota for its Prius hybrid electric vehicle (HEV); another was developed by Ford for its Escape HEV. The compound‐split PG EVT system is more complicated than the input‐split system. The design of PG EVT systems is challenging as the system needs to offer all hybrid features of a full hybrid, namely the electric launch, cranking, electricity generation, idle stop‐start, regenerative braking, and EVT operation.
Planetary‐Geared Electric Variable Transmission Systems
Electric Vehicle Machines and Drives ; 315-342
22.06.2015
28 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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