Dr. Chris Mi is Associate professor of electrical and computer engineering at the University of Michigan – Dearborn. He regularly offers a graduate course in electric and hybrid vehicles. He has also taught courses and led seminars on the subject for the Society of Automotive Engineers (SAE) and the Institute of Electrical and Electronic Engineers (IEEE). Dr. Mi has conducted extensive research and published more than 60 articles on power electronics, motor drives, and hybrid electric vehicles. In addition to his position at UM-Dearborn, he is the vice chair of the IEEE Southeast Michigan section. Dr. Mi holds a BS and an MS degree from Northwestern Polytechnical University, Xi’an, China, and a Ph.D degree from the University of Toronto. Dr. Mi worked with General Electric Company from 2000 to 2001.

 

Dr. Mi won the “National Innovation Award” in 1992, the “Government Special Allowance” in 1994, and was listed in Marquis “Who is Who in America.”  Dr. Mi is the winner of the 2005 “Distinguished Teaching Award” of University of Michigan - Dearborn. He is a recipient of the 2007 IEEE Region 4 “Outstanding Engineer Award,” and the 2007 IEEE Southeastern Michigan Section “Outstanding Professional Award.” He recently won the 2007 SAE Environmental Excellence in Transportation (E2T) Award.

Planetary Gear Based Hybrid Electric Vehicle Powertrain and Its Power-Split and CVT Principle

 

Abstract: Planetary gear has been popular choices for the current available and planned hybrid electric vehicles (HEV). The planetary gears are used as power slit devices as well as a means to achieving continuous variable transmission, also known as e-CVT.

 

This tutorial will first explain the principle and dynamics of the planetary gear system and its power split function. The power split can be divided into input split and output split, or compound split when input and out split are combined. Then we will present the configurations and operating principle of the most popular HEV powertrains. Dynamic equations and mathematic models of the most popular systems will be discussed. The powertrains to be discussed during the tutorial all feature one or more planetary gear systems. They include:

 

· Toyota Prius HEV powertrain (THS-II)

· Toyota Camry dual planetary gear HEV powertrain

· The Ford Mariner HEV powertrain

· Dual-clutch HEV powertrain

· Tsai’s dual-planetary gear HEV powertrain

· Zhang’s CVT HEV powertrain

· GM two-mode hybrid powertrain

· Timken’s Compound split e-CVT

· Renualt’s infinite variable transmission (IVT)

Toyota separate axle powertrain: Toyota’s E-Four system (Highlander, Lexus RX400, GS450h, and LS600h HEV)

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