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Federal-Mogul Corp.

MicroTorq seal

The push to improve fuel economy while reducing emissions demands that every parasitic friction power loss be addressed. But reducing friction is in the opposite seal design direction required for robust sealing. Add to that today's dynamic seals have to maintain proper contact with shaft speeds near 8000 RPM (versus 5000 RPM a decade ago) and perform 2 functions: Keep lubricants in and keep contaminants out. Over time engine seals have progressed from emphasizing durability to now requiring more durability while also greatly reducing friction losses. Solving this design conflict over a wide range of engine application conditions required a new type of engine seal.

Federal-Mogul created an elastomeric seal that reduces friction up to 80% compared to competitor's conventional dynamic seals. Their innovation relies on a unique dual-hinge flex section that maintains contact with the rotating shaft. This gives the Federal-Mogul MicroTorq seal the ability to operate in modern global engine operating environments of higher pressures and vacuums and still deal with crankcase ventilation requirements. Benefits include improved MPG and reduced CO2 emissions as well as less heat generation which reduces the occurrence of carbonization (thus extending seal and engine life under severe conditions).

There are 4 elements of the MicroTorq innovation that make this innovation disruptive; the dual-hinged engineered seal is a new approach, the design is customizable for the harsher engine environments over a wide range of engines, the seal handles crankcase variations due to vacuum or other pressure variations, and the Federal-Mogul designed solution for installation improves the engine manufacturing process.