Technical Paper
A Work in Synthesizing Planetary Gear Trains for Plug-In Hybrid Electrical Powertrain Systems for Automotive Vehicles
2022-03-29
2022-01-0654
Planetary gear trains (PGT) are widely used in automatic transmissions (AT), hybrid electric powertrains (HEP) and plug-in hybrid electrical powertrains (PHEP) for automotive vehicles. Many PGTs have been developed by the industry including 6, 7, 8, 9 or 10 speeds automatic transmissions for internal combustion engine (ICE) powertrain systems; PGTs with two electrical machines (EM) and an ICE for single mode or multi-mode HEP systems; PGTs with single EM and an ICE for PHEP systems. Facing the new competitive challenges in motor vehicle electrification, synthesizing the simpler or if possible simplest PGTs for PHEP becomes an important task. The work reported in this article is such an effort which results in much simpler, if not the simplest, PGT designs for PHEP as well as for automatic transmissions.