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Continuously Variable Transmission (CVT) Systems: Technology and Applications Overview WB1616

Continuously Variable Transmission (CVT) technology is both a theoretical and practical option that addresses a number of system level improvement opportunities within the automotive and mobility industries. Although this technology has been available for many years and is now fully matured as a production ready technology, it is often not fully understood. This web seminar presents a focused view of CVT technology in all its forms and implementations. The aim of this course is to provide a more complete understanding of all the technologies that are considered continuously variable and to order them in terms of their automotive applicability. Time will be spent discussing application strategies, control and communication requirements with the rest of the powertrain, durability and lubricant requirements.

This eight-hour web seminar provides a thorough survey of all technologies that are considered applicable to automotive powertrains. These technologies will be reviewed within the contexts of both the other CVT technologies and suitability. Finally, the requirements of the device will be discussed and contrasted to appropriateness for use in a modern automotive application.

Learning Objectives
By participating in this web seminar, you will be able to:
  • Recognize all technologies classified as continuously variable
  • Explain the fundamentals of friction and lubrication applied to mechanical power transmission
  • Discuss the meaning and use of the functional properties of current lubricant technology
  • Represent the concept of friction-required and friction-not-required as applied to mechanical power transmission
  • Summarize the function and operation of all major CVT technologies
  • List the requirements of CVT and Traction specific lubricants

Who Should Attend
Designed as an introduction, this course is intended for anyone who is not familiar with the function, requirements, and application of continuously variable transmission technology to modern passenger vehicle transmission systems. The material covered in this seminar is targeted at a number of design and engineering disciplines including, but not limited to:
  • Design engineers and engineering managers
  • Vehicle powertrain and driveline designers
  • Component suppliers
  • Powertrain and driveline test and development engineers
  • Design services managers

The attendee must have a working knowledge of torque converters, epicyclic geartrains, multi-plate clutches (their function and actuation technologies) and a general understanding of lubrication technology prior to attending this course.
Session 1
  • Review of the Various CVT Strategies;
    • Overview of all major types of continuously variable technologies
    • Pros and cons of each
  • Comparison of ˜Stepped" vs. ˜Stepless" Transmission Technology
    • A brief review of transmission technology evolution
    • Benefits and drawbacks of two modes of operation
  • Concept of ˜friction required" transmissions (i.e. belt / chain CVT, Toroid, etc.) vs. ˜friction not required" technology (i.e. gears, etc.)
  • Conceptual and functional differences between mechanical power transmission systems that require friction to operate and those that do not
Session 2
  • Vehicle Powertrain Optimization Example
  • The systemic effect of stepped vs. stepless power transmission powertrain performance
  • Develop a model of the theoretical optimum functional requirement of a transmission
Session 3
  • Technology overview of belt style CVT (i.e. push / pull) and requirements of lubricant (CVT oil)
  • The specifics of a belt style CVT; most commonly based on a "push" belt technology, and the requirements of the lubricant to support expected performance levels
  • Technology overview of chain style CVT (i.e. pull)
    • The specifics of a chain style CVT, most commonly based on a ˜pull" belt technology
    • The requirements of the lubricant to support expected performance levels
Session 4
  • Technology overview of toroidal style CVT and the requirements of the lubricant (traction oil)
    • Specifics of a toroidal style CVT, most commonly based on a ˜bell" idler engaged with a set of toroids
    • Requirements of the lubricant to support expected performance levels
  • Technology overview of sphere style CVT
    • The specifics of a toroidal style CVT, most commonly based on a spherical planet (e.g. planet pinion gear of an epicyclic gear set) engaged with a set of conical races
    • Requirements of the lubricant to support expected performance levels
Registration Information
Registration for this live web seminar is available on a per-person basis, similar to purchasing a seat in a classroom. Participants attend an online session from work or home; anywhere with a PC with internet access and a telephone. The fee includes one connection to the conference calls (toll free telephone number provided for U.S. and select countries*) and assigned personal ID number; one connection to SAE's online training center (via WebEx); and access to a secure course in the SAE Learning Center that contains the presentations, supplemental materials, and assignments.

Registrations will be accepted until 5:00 p.m. the day before the start of the web seminar, but early registration is encouraged to allow for pre-course set-up and instructions.

*Global toll-free telephone numbers are provided for many countries outside the U.S., but are limited to those on the WebEx call-in toll-free number list. Check here to see if your country has a global call-in toll free telephone number for this web seminar. If your country is not listed, you may still connect using the US/Canada Call-in toll number or Voice over Internet Protocol (VoIP).

Although WebEx Training Manager will automatically launch when you join the web seminar, you or your system administrator are encouraged to download the plug-in in advance to help ensure successful setup. Click here, then follow the onscreen instructions.

Multiple Seat Discount - Does your company have a group of employees who need this course? Register one individual at the appropriate member or list price, then register additional employees at half off the list price. Registration by phone with SAE Customer Service is required to take advantage of this discount.

If you cannot attend, you may register a substitute in your place or transfer your registration to a future offering. A full refund is issued if you notify SAE at least 14 days prior to web seminar start date. If canceled less than 14 days prior, the full fee is charged. For $50, you may process a one-time transfer to a future offering within one year of canceled web seminar. Canceling may reduce group discounts. To cancel, transfer or send a substitute, call SAE Customer Service at 1-877-606-7323 (US & Canada only) or 1-724-776-4970.

William Mark McVea

Mark McVea

Dr. William Mark McVea, P.E., is currently President and Principal Engineer of KBE , Inc. where he and his team design and develop complete powertrains for automotive and off-highway vehicles. Dr. McVea has held many positions within the mechanical drive and powertrain industry; most recently as Chief Technology Officer for Torvec, Inc., an industry leader in the design and development of patented powertrain engineering technology used primarily in the automotive industry. His prior positions include Professor of Vehicle Dynamics and Powertrain Sciences in the Mechanical Engineering Department at the Rochester Institute of Technology and adjunct professor at Purdue University in their Automotive Sciences Department. He was also formerly a manager of the CAE group within a tier-one powertrain supplier to global automotive markets, a consulting engineer in vehicle dynamics with Gear Consultants, Inc., and a project manager of traction systems for off-highway vehicles with Clark-Hurth International. Dr. McVea has published extensively on the topics of transmission systems, automated design assistant systems, knowledge systems and knowledge based engineering in general. He also holds or is listed as co-inventor on numerous patents related to mechanical power transmissions. Dr. McVea holds a B.S. in Mechanical Engineering from the Rochester Institute of Technology, a Ph.D. in Design Engineering from Purdue University and is a licensed Professional Engineer.

Fees: $640.00
SAE Members: $512.00 - $576.00

.8 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

For additional information, contact SAE Customer Service 1-877-606-7323 (724-776-4970 outside the U.S. and Canada) or at

Duration: 8 Hours
Upcoming open enrollment dates being scheduled. Please check back.