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Transmission system for tire state quantities

  • US 8,091,418 B2
  • Filed: 12/09/2005
  • Issued: 01/10/2012
  • Est. Priority Date: 12/15/2004
  • Status: Expired due to Fees
First Claim
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1. A transmission device for a motor vehicle for transmitting signals about tire condition variables from a wheel to an electronic unit arranged in the vehicle body, wherein the tire condition variables can be detected especially by one or a plurality of sensor subassemblies (14) which are arranged in a wheel rotatably mounted at the body above the wheel hub (3), the device comprising:

  • a coupling device is integrated into a wheel hub, which is composed of a rotor (6a) and a non-rotating stator (6b) to generate a field coupling, and whose one or more field coupling elements (20, 22, 34a, 34b, 39a, 39b) are opposite each other, separated by a narrow air slot (24), and a signal coupling takes place by at least one of electric fields, magnetic fields, and electromagnetic fields, and least one of the rotor (6a) and the stator (6b) is subdivided in a circumferential direction into two or more sectors, with the sectors including a differing magnetic coupling for a rotational-speed-responsive field coupling of rotor (6a) and stator (6b); and

    wherein the two or more sectors are alternately arranged in the circumferential direction such that the field coupling has an alternating output resulting from the differing magnetic coupling.

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