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Electromagnetic inertia brake for a power input shaft of a power transmission mechanism

  • US 7,681,704 B2
  • Filed: 12/12/2006
  • Issued: 03/23/2010
  • Est. Priority Date: 01/20/2004
  • Status: Active Grant
First Claim
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1. An electromagnetic brake for a power input shaft of a multiple-ratio transmission mechanism in a vehicle powertrain having an engine and a disconnect clutch between the power input shaft and the engine;

  • the electromagnetic brake having an armature drivably connected to the power input shaft;

    an electromagnetic coil housing connected to a housing for the transmission mechanism;

    an electromagnetic coil in the coil housing adjacent the armature, the electromagnetic coil and the coil housing defining an electromagnetic pole face, the armature and the pole face defining a pre-determined air gap therebetween; and

    a spring-loaded insert carried by the coil housing for applying a brake disengaging force on the armature when the armature is attracted toward the pole face as the electromagnetic coil is energized, whereby the armature is released from frictional contact with the pole face when the electromagnetic coil is de-energized.

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