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TIRE PRESSURE MONITORING SYSTEM

  • US 20140354420A1
  • Filed: 03/06/2013
  • Published: 12/04/2014
  • Est. Priority Date: 03/09/2012
  • Status: Active Grant
First Claim
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1. A tire pressure monitoring system comprising:

  • a pressure sensor to detect a tire pressure;

    an abnormality determination means that determines a state to be normal in which air pressures of front wheels are higher than a front wheel warning threshold and the air pressures of rear wheels are higher than a rear wheel warning threshold different from the front wheel warning threshold and that determines when the state is abnormal; and

    a lamp lighting means that is configured to turn off a warning lamp when the state is determined to be normal and to turn on the warning lamp when the state is abnormal, wherein, at the time of an ignition switch being turned on after a vehicle stop, in response to the state being abnormal as determined by the abnormality determination means, when the warning lamp has been in an off state during the vehicle stop, the tire pressures of two wheels are higher value than a of the front wheel threshold and the rear wheel threshold, and the tire pressures of a remaining two wheels are higher than a lower value of the front wheel threshold and the rear wheel threshold, the warning lamp is configured to be turned off while, when the warning lamp has been in an on state during the vehicle stopped state, a preventive control is performed for preventing the warning light from being lit erroneously.

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