Tire deflation judgement method

Tire deflation judgement method

  • CN 1,721,211 B
  • Filed: 07/06/2005
  • Issued: 06/13/2012
  • Est. Priority Date: 07/12/2004
  • Status: Active Grant
First Claim
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1. the utilization rotary speed information that is installed in the wheel on the vehicle is judged the low tyre determination methods of low tyre, and this method comprises the steps:

  • Spin velocity through taking turns by bus with tire radius comes Calculation Speed information,Detect vehicle from beginning certain distance of whether having gone,When operating range reaches specific range, judge propulsive effort whether for just and car speed whether reach more than the particular value,When car speed is stabilized in more than the certain value and propulsive effort is correct time, calculate the acceleration/accel of front and back wheel velocity ratio and vehicle,Judge whether it is the initial data collection mode,When not being the initial data collection mode;

    The data of front and back wheel velocity ratio under front and back wheel velocity ratio and the normal barometric pressure are compared;

    If the ratio of front and back wheel velocity ratio and normal barometric pressure front and back wheel velocity ratio is greater than predefined drive wheel insufficient pressure decision threshold;

    Send the alarm of drive wheel insufficient pressureWhen judging that drive wheel air pressure does not have deficiency,, just send 4 and take turns the not enough alarm of air pressure if the ratio of front and back wheel velocity ratio and normal barometric pressure front and back wheel velocity ratio is taken turns the not enough threshold value of air pressure less than predefined 4.

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