Federal-mogul World Wide, Inc.

Michael J Anderson

David Michael Toth

Gerald A Greca

An oil lubricated rotating hub () and stationary spindle () assembly includes an oil bath seal (') for establishing a dynamic sealing interface between the hub () and spindle (). A wheel sensor assembly includes a variable reluctance senor () targeted at an encoder ring (&#x2032;) which is integrated into the oil bath seal (&#x2032;). The encoder ring (&#x2032;) is of the permanent magnet type including a plurality of magnetically polarized sectors alternating between North and South polarities. The use of an encoder style target (&#x2032;) in combination with a variable reluctance sensor () enables improved slow speed sensing with relatively large air gap spacing between the exposed (&#x2032;) of the encoder ring (&#x2032;) and the head of the VR sensor (). Furthermore, the encoder ring (&#x2032;) enables use of less expensive, lighter materials for the oil bath seal carrier (&#x2032;).

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Brighton, MI, United States of America

Michael J Anderson