Fundamentals of Powertrain Design for Hybrid Electric Vehicles

Driven by high fuel prices, environmental regulations, and consumer demand, the market for hybrid electric vehicles (HEV) has experienced rapid growth. Every major automotive company produces an HEV. There are approximately fifty different HEV models on the market and over eight million HEVs already sold. In order to meet current and future demands in the HEV and PHEV markets, success will depend on engineering personnel knowing how to develop and manufacture HEV powertrains.

This two day seminar will cover the fundamentals of HEV powertrain design. The typical architecture of HEVs and the basic functions and modes of a hybrid electric powertrain will be discussed. The seminar will also explain both powertrain design for (P)HEVs as well hybrid transmissions. HEV models such as Prius, Volt, Jeely, Infinity M35h, Jetta, Qin, and BMW i8 will be discussed in case studies.

What Will You Learn

By attending this training program, you will be able to:
  • Recognize the basic layouts of different powertrain architectures for HEVs
  • Explain the functions a powertrain should provide to a HEV
  • Understand what modes an HEV powertrain may work in and shift among
  • Identify the main HEV development considerations for a HEV powertrain
  • Evaluate a powertrain architecture for a certain HEV
  • Recognize an engine or electric motor for an HEV considering the power, torque and efficiency
  • Define a basic transmission for a hybrid transmission
  • Understand how a power coupling mechanism works to switch power flow
  • Identify engineering challenges for developing a HEV transmission
  • Demonstrate basic knowledge of designing a hybrid transmission and its components

Is This Course For You

An undergraduate degree in engineering is highly recommended. Attendees should have some knowledge/experience either in integrating a powertrain into a vehicle, in engineering and manufacturing powertrain for vehicles, or in engineering or manufacturing of transmission/engine/e-motor and the components.

Materials Provided

This data is not available at this time

Course Requirements

This data is not available at this time

Topics

DAY ONE
  • Hybrid Electric Vehicles (including Plug-in HEV) and Powertrains
    • Architecture of hybrid electric vehicles
    • Hybrid Electric Vehicle(HEV), Plug-in HEV, Range-extend Electric Vehicle
    • PS, P1, P2, P3, and P4 hybrid electric powertrains
    • Control and communication
    • Communication among control units
  • Basic functions/modes of a hybrid electric powertrain
    • System starts and is READY
    • Start and stop
    • Electric drive mode: Drive, reverse, and speed ratio change
    • Generating electric power while vehicle stops
    • HEV mode: e-Motor assisting drive, generating while the engine is driving, engine drives while e-motor idling
    • Regenerative braking: In EV mode or in HEV mode and at high or low speed
    • Engine driving launch: In HEV mode and at high speed
    • Functionalities in some extreme conditions
  • Subsystems and components in a hybrid electric vehicle
    • Engine: Power, torque, and fuel efficiency
    • Electric motor: Motoring and generating, peak torque and rated torque, peak power and rated power, cooling
    • Battery: Available energy, rated power, peak power
    • Transmission: AT, DCT, CVT, AMT, e-CVT
    • Power coupling: Planetary gear set; clutch: dry, wet and dog clutch, torque converter
DAY TWO
  • Powertrain design for a (P)HEV
    • Mass and running resistance
    • Performance: EV mode, HEV mode, slope climbing, performance simulation
    • Fuel consumption and combined fuel consumption
    • Walk-down fuel consumption
    • Energy management strategy: Shifting between EV mode and HEV mode and EV priority or HEV priority
    • Plug-in charging battery; Normal charging and charging at high or low temperatures
    • Powertrain and drive: Front wheel drive, rear wheel drive, 4-wheel drive
  • Hybrid transmissions
    • Power-split hybrid electric
      • EV mode, HEV mode and shift between two modes
      • Prius hybrid electric drive
      • Volt hybrid electric drive
      • Geely"s hybrid electric drive
    • P2 hybrid electric drive
      • One e-motor and two clutch
      • EV mode, HEV mode and shift between two modes
      • Infinity M35h hybrid electric drive
      • Jetta hybrid electric drive
      • P2 hybrid electric drive with a compound power coupler
      • A power coupler with a planetary gear and clutch(es)
    • P3 hybrid electric drive: "Qin"s" plug-in hybrid electric drive
    • P4 hybrid electric drive: BMW i8 plug-in hybrid electric drive
    • Series hybrid electric drive: Accord plug-in hybrid electric drive