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Adaptive vehicle drive system for extreme operating conditioning

  • US 5,704,444 A
  • Filed: 12/11/1995
  • Issued: 01/06/1998
  • Est. Priority Date: 12/11/1995
  • Status: Expired due to Term
First Claim
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1. An adaptive vehicle drive system comprising, in combination,a first driveline having a first speed sensor,a second driveline having a second speed sensor,a transfer case for driving said first driveline and said second driveline a modulating clutch operably disposed between said first driveline and said second driveline, and a lockup clutch operably disposed between said first driveline and said second driveline,a microcontroller for receiving signals from said first and said second speed sensors anddetermining the average and instantaneous speed differences between said first driveline and said second driveline over a predetermined time period,determining the speed of the slower of said first and said second drivelines,comparing said average and instantaneous speed differences to said speed of said slower of said drivelines,providing signals sequentially to said modulating clutch and said lockup clutch to operably couple said first and said second drivelines in response to both said average speed difference and said instantaneous speed difference exceeding respective predetermined values relating to said speed of said slower of said drivelines.

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