Attributing increasingly stringent US fuel economy (CAFE) rules as the motivation for the development...
Quote:
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...one of the largest suppliers of seals for rotating shafts, says it has developed a new design that reduces rotating friction by as much as 75%. If incorporated on all the seals on a typical OEM powertrain—including the engine, transmission, axle and bearing—the new design could improve fuel efficiency by about 2%, according to the supplier.
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Source:
Shaft Seal Design Boosts Fuel Economy | The Carlovers Magazine
The seal design also apparently:
- removes the need for a steel pressure ring
- reduces heat build up, extending life
- is being used in one un-named new engine