Watch exclusive one-to-one interviews with the winners at the 2010 International Engine of the Year Awards
Read Engine Expo 2010 Show Review here
Dr. Jan Naude
Managing Director
Tel: +27 (11) 476 3285
Email: jnaude@varibox.com
Web: http://www.varibox.com
Varibox CVT Technologies is an intellectual property company specializing in the development and licensing of alternative positive drive CVT (Continuously Variable Transmission) concepts.
Naudic RotorCVT
The RotorCVT is a type of ratcheting CVT (Continuously Variable Transmission). It provides infinite small ratio changes and includes a geared neutral, which eliminates the need for a clutch or torque convertor. The RotorCVT provides a simple and robust design with a high mechanical efficiency. A prototype has been tested in an off-road vehicle. Current designs of the RotorCVT for small passenger vehicles indicate very significant benefits in terms of production cost and weight if compared to existing commercial CVT’s.
Applications include:
• Small and micro automobiles
• Outdoor power equipment
• Agricultural equipment
• Variable speed geared motors
Concept designs of the RotorCVT include a 90° configuration (right) and an in line configuration (left). Dimensions for a 100 N.m input RotorCVT are typically, Length: 466mm, Width: 354mm, Height: 355mm and therefore fits the design space available in small passenger vehicles.
A prototype of the RotorCVT is implemented in a small off-road vehicle and serves as proof of concept.
A fully functional model of a 90° configuration RotorCVT
The RotorCVT provide advantages in terms of:
• Fuel consumption reduction
• Reduced emissions
• Manufacturing cost reduction
• Transmission weight reduction
Naudic iCVT
Varibox CVT Technologies has developed a world first positive drive (not friction) iCVT (incremental Continuously Variable Transmission). It is a conceptual new (not adapted) CVT gearbox that accomplishes a positive mechanical drive at all times. Typical 78 ratios exist and ratio shifting is done under full load without any power/torque interruption while a positive mechanical linked drive is maintained at all times. A 150 kW prototype has been built, and implemented in a test vehicle. The iCVT variator has been tested to 600 N.m input torque.
iCVT Test Vehicle
Features:
• Pure mechanically positive drive even when shifting.
• Large number of ratios - typically78.
• Shift ratios under load with NO clutch or torque converter.
• No special materials or manufacturing processed needed.
• No Hydraulic control, thus no valve body or hydraulic pump if compared to existing CVT's or automatics.
• Complexity is rated as less complex that an automatic but more complex than a manual transmission.
• No Competition exists in high power automotive and truck markets.
• CVT capability at mechanical efficiency comparable to manual transmissions.
• The iCVT CONCEPT is patented in 13 countries.
• Can be scaled up or down to conform to any torque or power requirement.
• Reduced fuel consumption and emissions.
• Wide ration range, typically 6.5
Applications include:
• Passenger vehicle
• Trucks and busses
• Construction equipment
Rocker pin chain
This presents the most recent iCVT design including an integrated shifting mechanism while using a silent (rocker pin) chain as main drive.
Volvo unveiled new petrol engine family
Eaton scoop top honors
IC Boost
Click here for listings and information on leading suppliers covering all aspects of the engine technology industry. Want to see your company included? Contact s.willard@ukipme.com for more details.
Do you have an opinion you'd like to share with the engine technology community? We'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to d.slavnich@ukipme.com
To send us your recruitment advertising or to receive information on placing a banner please email s.willard@ukipme.com
