Wheel-less gearbox promises revolution in transmission

5 September 2013
By Tereza Pultarova
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The Controlled Rotation System promises to cut maintenance costs due to design changes

The Controlled Rotation System promises to cut maintenance costs due to design changes [Credit: Parts Services Holland]

A Dutch team has invented, developed and patented a transmission system that promises to reduce maintenance cost and reduce fuel consumption.

The Eindhoven-based Parts Services Holland company believes the innovative gearbox, consisting of two discs powered by a strong belt, could have a potential to change the global automotive industry.

Due to its design, the wheel-less Controlled Rotation System (CRS), avoids friction between the gears and is therefore believed to provide longer life-span.

With the help of a digital operated hydraulic oil pump and so called slide units the diameter of the two discs is increased and decreased, causing acceleration and deceleration, thus providing a different gear.

"This innovation fits perfectly in a green economy. It's easier, more compact and cheaper to assemble than traditional transmissions,” the company said in a statement. “It saves energy, offers more gear possibilities and can be used in all kinds of applications. The technique is completely different compared to the traditional gearbox which dates from the 19th century.”

Originally developed for bicycles, the new transmission system can be mounted into cars, windmills, ships or motorbikes.

The team said they had been inspired to look for a better transmission solution when seeing cyclist Andy Schleck losing his bicycle chain during a crucial moment of the Tour de France while shifting gear.

The prototype Dual Slide Gear system was originally developed for bikes with further design improvements leading to a solution for the automotive industry.

The first prototype for cars measures 30 x 22 x 18 centimetres and is most effective when used in electric cars as the electric engine can  run in a constant revolutions per minute. By linking each wheel to a separate transmission a lot of energy can be saved.

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