International Conference “CVT in automotive applications – Set screws for better efficiency”

Conference: CVT in automotive applications

Performing remarkably well with excellent consumption figures, the CVT-drive stands out amongst all other drive concepts. It is valued very highly mainly in the Asian market, however, its significance is now growing in the North American market, too. Efficiency improvement is the key to outperform its rival concepts automatic and dual clutch transmission. Which engineering concepts are required to achieve further optimization will be discussed at the international conference “CVT in automotive applications“.

Conference “CVT in automotive applications”: Challenges inherent on system and component level

The international conference “CVT in automotive applications – Set screws for better efficiency” invites international transmission experts to come to Friedrichshafen/Germany on 21st and 22nd June 2016 to discuss the concepts that are necessary to achieve further efficiency optimization in CVTs. The focus will be placed on both system-wide approaches as well as solutions on component level.

Topics at the Conference

The conference will focus on the following topics:

Download Program PDF

Tuesday, 21 June




Welcome and opening by congress chair

Dr.-Ing. Harald Naunheimer, Senior Vice President Corporate R&D, ZF
Friedrichshafen AG, Friedrichshafen, Germany


Anniversary greetings

Prof. Dr.-Ing. Udo Ungeheuer, president, VDI The Association of
German Engineers, Duesseldorf, Germany


30 years Drivetrains for Vehicles - history and future

Prof. Dr.-Ing. Bernd-Robert Höhn, Emeritus, Institute for Machine
Elements/FZG, Technische Universität München, Garching, Germany


Driveline Intelligence – efficiency, comfort and safety

  • Market needs, technology trends
  • Predictive driving (DAS sensors and V2X)
  • Interaction driveline and automated driving

Dr.-Ing. Stefan Sommer, CEO , ZF Friedrichshafen AG, Friedrichshafen,


Challenges and opportunities regarding real world

  • What “efficiency” means for car drivers, industry and
  • How today´s drive cycles reflect emissions reality
  • Opportunities and limitations of electrified powertrains
  • Powertrain and transmission designs for real-world

Dipl.-Ing. (FH) Bernd Eckl, Executive Vice President Sales, Marketing,
Business Development & Corporate Communications, GETRAG,
Untergruppenbach, Germany


SUBARU CVT toward 2020

  • Pinoneer of mass production CVT
  • Further CVT expansion in the market
  • Next generation CVT

Osamu Eriguchi, General Manager of Transmission Design Department,
Fuji Heavy Industries Ltd., SUBARU Engineering Division, Tokyo, Japan


Future drivetrain requirements for global off-highway

Christopher A. Myers, Global Director Tractor Platform Engineering,
Product Engineering Center, Deere & Company, Waterloo, USA


Coffee break and visit to the exhibition


Welcome address and opening of the conference by
conference chair

Prof. Dr.-Ing. Dr. h.c. Albert Albers, Head of IPEK, IPEK –
Institute of Product Engineering, Karlsruhe Institute of Technology (KIT),
Karlsruhe, Germany


Technologies need to have more flexibility

  • Limitation of technologies aiming to improve only efficiency
  • Flexibility – the key to evolve for technologies
  • CVT – distinctive flexibility and the potential to evolve

Dr. Ryozo Hiraku, Alliance General Manager for
Powertrain Advanced Engineering, Technology Planning
Department, Nissan Motor Co., Ltd., Atsugi Kanagawa, Japan


CVT in comparison to other transmission concepts

  • Comparison of CVT, DCT and MT - State-of-the-art
    powertrain for B-class vehicles
  • Simulation and vehicle measurements
  • Efficiency, comfort, performance

Dr.-Ing. Gereon Hellenbroich, Department Manager Transmission
Design and CAE, Co-authors: Peter Janssen, Dr. Ingo Steinberg, all of
FEV GmbH, Aachen, Germany


Enhanced performance of next generation LINEARTRONIC

  • Unique concept of high efficiency variator and
    longitudinal transaxle configuration
  • Improving fuel economy by the expand ratio spread
    and reduce friction losses
  • Optimizing driving comfort and dynamics by the new
    shift strategy

Masami Oguri, M.Sc., Manager of Transmission Project Group,
Transmission Design Department,
Co-authors: Hironaga Itou, Naoyuki Akiyama, all of Fuji Heavy
Industries Ltd., SUBARU Engineering Division, Tokyo, Japan


Lunch break and visit to the exhibition


How to build better CVTs?

  • Benefit of well optimized CVT components for customer
  • Latest status of development of CVT chains,
    testing results concerning durability and NVH
  • Outlook for further development of CVT chain – create
    a new modular concept
  • Further ideas for components inside the CVT

Dipl.-Ing. André Teubert, Senior Manager Development CVT, LuK
GmbH & Co. KG, Buehl, Germany


 VT5, the next high efficient CVT Generation of Punch

  • CVT potential
  • Family approach
  • Transmission Lay-out
  • Efficiency Measures

Ir. Koen Laurijssen, Chief Engineer, System Engineer VT5, CVT –
Controls Engineering – Powertrain Simulation
Co-Authors: Dr. Ir. Alex Serrarens, Ir. Elias van Wijk, Ing. Gert-Jan
Vogelaar, all of Punch Powertrain, Sint-Truiden, Belgium and Eindhoven,
The Netherlands


Start/Stop-Coasting and CVT: an effective, customer
perceivable and attractive fuel-saving combination

  • Operating concept, requirements for the vehicle
    system, driver experience
  • Successful feasibility study for CVT applications based
    on simulations
  • High fuel-saving potential, evaluation of driver comfort
    and hardware requirements for the CVT at restart

Alexandre Pigeard, Engineer (Master degrees), Section Manager
Software and Simulations, Research & Development, Engineering
Transmissions, Co-authors: Tom van Dongen, both of Bosch
Transmission Technology B.V., Tilburg, The Netherlands, Steffen Strauß,
Robert Bosch GmbH, Schwieberdingen, Germany


Testing the CMM model of chain-CVT transmissions in
steady-state and shifting conditions

  • Experiment on shifting response of chain and belt
    continuously variable transmissions
  • Modelling of shifting response and comparison with

Prof. PhD Giuseppe Carbone, Professor, Department of Mechanics,
Mathematics and Management, Politecnico di Bari, Italy


Coffee break and visit to the exhibition


Model-based system design methods for vehicular

  • Automated-discrete-topology modeling for hybrid powertrain design
  • Integrated design procedures: examples of optimal powertrain sizing
  • Influence of physical design specifications on the control design
    specifications for CVT-based powertrain design

Dr. Ir. Theo Hofman, Assistant Professor, Mechanical Engineering,
Co-authors: Rob Roijackers, Wouter van Buul, all of Eindhoven
University of Technology (TU/e), Eindhoven, The Netherlands


CVT-Hybrid – low emission, high performance

  • The Multimode CVT – example for an advanced CVT
    hybrid concept
  • Key aspects: efficiency enhancement by temporary
    variator disconnection combined with direct gear
  • Simulation results regarding CO2 benefits, vehicle
    performance and driving comfort by using a CVT hybrid

Dr. Christian Lauinger, Manager Advanced Development CVT /
wet DC, Co-authors: Dipl.-Ing. Andreas Götz, Dipl.-Ing. (FH) Bernhard
Walter, all of LuK GmbH & Co. KG, Buehl, Germany


End of the conference day


Reception and evening lunch


Jubilee Highlight

Science Slam 2016
The award of the ”Golden Gear“!

They are young and brainy and have a sense of humour. We are talking about
four junior scientists who have just graduated from university. They will tell you
in a joking and humorous manner how to bring across scientific contents to
someone in a fun way. And you, the audience are the jury who will vote for the
winner of this contest with different levels of your applause. Look forward to

  • Doris Aschenbrenner from the University of Würzburg talking about “Networking
  • Johannes Kretzschmar from Jena University talking about “Frankenstein’s
    electric vehicle“,
  • Mogan Ramesh from the Technische Universität München talking about “My
    engine is a vegan“ and
  • Stefan Kurtenbach from RWTH Aachen University talking about “Programming
    transmission software“.

Who is going to win the Golden Gear?

Wednesday, 22 June


Development of hydraulic control system for a new widerange

  • New wide-range CVT feature
  • Control system for the new wide-range CVT
  • Key technologies for the new hydraulic control system

Katsuo Kato, Development Engineer, Hardware System Development
Department, Jatco Ltd, Atsugi City, Kanagawa, Japan


Development of an improved electro-hydraulic CVT

  • Explanation and design principles of the Servo-
  • Control performance and robustness with regard to
    shifting and pulley clamping
  • Actuator loading and power consumption

Loek Marquenie, M.Sc., Project Leader, Research & Development,
Co-authors: Ir. Jacques van Rooij, Ir. Tim Clephas, all of Gear Chain
Industrial BV, Eindhoven, The Netherlands


The trend and future of Torque Converter for CVT

  • Change with the time of requirements on TC for CVT
    compared with that of Step AT’s
  • Future TC for CVTs
  • Slip or Lock up?

Shinji Fujimoto, Executive Officer, Executive General Manager,
Development Headquarters and Nobuyoshi Shiomura,
Co-authors: Keiji Sato, Yuuki Kawahara, all of EXEDY Corporation,
Neyagawa-City, Osaka, Japan


Improvement of transmission efficiency by reducing the
drag torque in disengaged wet clutch

  • Reducing CO2 emission by improvement of efficiency of
  • Facing of friction disk made with paper based material
  • Improvement of the fuel efficiency of vehicles by
    reduction of drag torque in open disengaged wet
    clutch, achievement by grooving on friction disk
  • An analytical model for estimating the drag torque

PhD Shahjada A. Pahlovy, Research and Development Engineer,
Advanced Technology Development,
Co-authors: Dr. PhD Syeda Faria Mahmud, Norio Takakura all of Dynax
Corporation, Tomakomai, Hokkaido, Japan


Coffee break


Recent material developments for further optimization
of pushbelt CVT power density

  • Transmittable power & torque, transmission size, ratio
    coverage, and durability
  • Improvement of the fatigue properties of the pushbelt
  • Use of high-alloyed maraging steels with high
    mechanical strength and high fatigue strength
  • Improved fatigue properties of pushbelt loops by
    optimization of the maraging steel compositions and
    hardening heat treatments

Bert Pennings, Ir. PDEng., Research Engineer, Research &
Development, Bosch Transmission Technology B.V., Tilburg, The


Tribosystemic view of CVT in drive systems

  • Understand complex friction mechanisms in context of
    overall system behaviour
  • Generate robust friction systems for efficient CVT
    applications, ensure system properties, which enables
    reducing system safety and thus increasing energy
  • Analyse the influence of complex kinematic
    relationships on the tribological behaviour, gain
    simulation models of processes and the impact on the
    system behaviour
  • Evaluate benefit of CVT for electrified drive systems

Dipl.-Ing. Sascha Ott, Managing Director
Co-authors: Prof. Dr.-Ing. Dr. h.c. Albert Albers, Dipl.-Ing. Katharina
Bause, all of IPEK Institute of Product Engineering, Karlsruhe Institute
of Technology (KIT), Karlsruhe, Germany


Influences of surface structures on the efficiency of
continuously variable transmissions

  • Experimental tests with differently structured pulley surfaces
  • Simulations for the lubricant displacement in the tribological contact
    and for the system behavior of the variator
  • Influences of the structures on the efficiency and the Performance depending on the operating point

Dipl.-Ing. Jan-Niklas Mach, Research Associate
Co-author: Prof. Dr.-Ing. Gerhard Poll, both of Institut für Maschinenkonstruktion
und Tribologie, Leibniz University of Hannover, Germany




CVT powerpath solutions using Continuously Variable
Planetary (CVP) for maximum fuel economy

  • Development of multimode CVT power path concepts
    by using a continuously variable planetary that
    optimize ratio spread and efficiency
  • A loss model of the CVT transmission for a vehicle
    simulation to estimate fuel economy
  • An example of a fuel economy simulation for a typical
    automotive application

Gordon McIndoe, MSc. Mechanical Engineering, Technical Expert
Transmission Systems, Light Vehicle Driveline Technologies, Dana
Holding Corporation, Leander, Texas, USA
Co-author: Evrim Taskiran, Dana Spicer Brugge office, Belgium


The Cone-Ring-Transmission will go into production!

  • Concept and efficiency of the Cone-Ring-Transmission
  • Comparison to other CVTs
  • Way to Series Production

Dr.-Ing. Heinz-Dieter Schneider, Manager Construction and
Development, Co-author: Dipl.-Ing. Roy Rompelberg, both of GIF –
Entwicklungsgesellschaft mbH, Alsdorf, Germany


High efficiency “full-toroidal” traction drive CVT –
Technology improvements and application to front wheel
drive cars

  • Increased traction drive efficiency
  • Reduced parasitic losses
  • Minimized actuator power required to change speed ratio and
    optimized clamp load
  • Combining these advances into a high efficiency front wheel drive CVT

John Fuller, B.Eng. (Hons), Director Intellectual Property, New Concepts
and Intellectual Property, Co-author: Chris Gaskell, both of Torotrak
Group, Leyland, UK


Conclusions by the conference chair and end of the

We are in the position to choose from a number of international speakers who will be present at the conference. Experts from the following enterprises will be happy to present their solutions:

  • Bosch
  • Dana
  • Dynax
  • Eindhoven University of Technology
  • FEV
  • Fuji Heavy Industries/Subaru
  • GCI
  • GIF-Entwicklungsgesellschaft
  • Jatco
  • Karlsruhe Institute of Technology
  • Leibniz University of Hannover
  • LuK
  • Politecnico die Bari
  • Punch Powertrain
  • Torotrak

A Panel of Experts will provide their Support at the Conference

The conference will be supported by a committee of international experts. The following specialists will share their know-how to add to the technical content of the conference:

  • Prof. Dr.-Ing. Albert Albers, Head of IPEK, IPEK – Institute of Product Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
  • Andreas Englisch, Vice President Product Units CVT (LC), Wet Double Clutch, TC (Europe), LuK GmbH & Co. KG, Buehl, Germany
  • Hans Fleischmann, Head of Development Automatic Transmissions, Audi AG, Ingolstadt, Germany
  • Hong Jiang, Dept. Manager/Technical Leader, Trans & Driveline System R&A, Ford Motor Company, Dearborn, USA
  • Shigeo Murata, Engineering Director, Powertrain Engineering Division, Nissan Motor Co., Ltd., Atsugi, Japan
  • Takashi Shibayama, Fellow, R&D Technology Officer, Jatco Ltd, Atsugi City, Japan
  • Han-Hein Spit, Director, Gasoline Systems, Continiously Variable Transmission, Project Management Department, Sales and Marketing, Bosch Transmission Technology BV, Tilburg, Netherlands

Conference “CVT” under the same roof as the VDI Congress “Drivetrain for Vehicles“

The International Conference “CVT in Automotive Applications” will be held at the same time and venue as the International VDI Congress “Drivetrain for Vehicles” as well as the International Conference “Transmissions in mobile machines” which are counting more than 1,300 participants. Therefore conference participants can choose to listen to additional 70 specialist lectures and will be able to switch between events. Please note: There is no simultaneous translation of the workshops on 20 June 2016 – only in German!

Advisory Board

 Albert Albers Univ.-Prof. Dr.-Ing. Dr. h.c. Albert Albers Karlsruher Institut für Technologie (KIT) / Karlsruhe

 Andreas Englisch Dipl.-Ing. Dipl.-Wirtsch.-Ing. Andreas Englisch LuK GmbH & Co KG / Bühl

 Hans-Peter Fleischmann Dipl.-Ing. (FH) Hans-Peter Fleischmann Audi AG / Ingolstadt

 Hong Jiang Hong Jiang Ford Motor Company / Dearborn

 Shigeo Murata Shigeo Murata Nissan Motor Co. Ltd. / Atsugi-shi Kanagawa

 Takashi Shibayama Takashi Shibayama JATCO Ltd. / Atsugi City Kanagawa

 Han-Hein Spit Han-Hein Spit Bosch Transmission Technology B.V. / Tilburg