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Adaptive inflation control for vehicle central tire inflation system

  • US 5,180,456 A
  • Filed: 11/15/1991
  • Issued: 01/19/1993
  • Est. Priority Date: 11/15/1991
  • Status: Expired due to Fees
First Claim
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1. A vehicle including a plurality of inflatable tire volumes and an onboard tire pressure control system comprising:

  • an air source providing pressurized air for inflating the tires;

    valve means movable from a closed position blocking air communication between the air source and the volumes to an open position allowing such communication in response to a valve open signal;

    selector means producing any of several demand tire pressure signals representative of desired tire pressure;

    a control circuit including means operative to produce an inflation signal in response to means producing a signal indicating current tire pressure being less than demand tire pressure, the improvement comprising;

    means operative in response to the inflation signal to initiate transmittal of a series of the valve open signals with a time space between each valve open signal and with each valve open signal having a time period;

    means for terminating the series in response to means sensing the current tire pressure not being less than the demand tire pressure;

    means for producing a count of the number of valve open signals in the series; and

    means for increasing the time period in a next series in response to the count being greater than a predetermined count range and for decreasing the time period of the next series in response to the count being less than the predetermined count range.

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