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Driving status discrimination device for a motor vehicle

  • US 4,747,055 A
  • Filed: 03/07/1986
  • Issued: 05/24/1988
  • Est. Priority Date: 03/27/1985
  • Status: Expired due to Fees
First Claim
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1. A driving status discrimination device for a motor vehicle having a steering wheel manually rotatable by a driver, comprising:

  • steering angle detection means for detecting the rotational angle of said steering wheel so as to output a steering angle signal representing said detected rotational angle;

    data storage means for receiving said steering angle signal from said detection means at a predetermined interval so as to store a plurality of said steering angle signals, said data storage means being operable for deleting the oldest one of said steering angle signals each time a new steering angle signal is received after said plurality of steering angle signals stored therein reaches a predetermined number; and

    a processing means for classifying said plurality of steering angle signals stored in said data storage means into first and second class signals, the value of each of said first class signals belonging to any of a relatively narrow interval including a center value of said plurality of steering angle signals and other intervals except for a relatively wide interval including said center value, said second class signals being the remainder of said plurality of steering angle signals;

    for calculating an index value which represents the driving status of said vehicle, based upon said second class signals and all of said steering angle signals stored in said data storage means; and

    for discriminating a mountain road driving and a town street driving from each other responsive to said index value so as to selectively output a mountain road signal and a town street signal.

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