TIRE AIR PRESSURE DETECTING DEVICE, TIRE AIR PRESSURE MONITORING SYSTEM, AND TIRE AIR PRESSURE NOTIFICATION METHOD
First Claim
1. A tire air pressure detecting device comprising:
- an air pressure detecting unit configured and arranged to detect a tire air pressure of a tire mounted to a vehicle;
a transmitting unit configured and arranged to transmit a detected value of the tire air pressure detected by the air pressure detecting unit;
a running state detecting unit configured and arranged to detect a running state of the vehicle;
an air pressure change rate detecting section configured to detect an air pressure change rate at which the tire air pressure changes; and
a frequency adjustment section configured to adjust a transmitting frequency at which the detected value of the tire air pressure detected by the air pressure detecting unit is externally transmitted by the transmitting unit according to the running state detected by the running state detecting unit and the air pressure change rate detected by the air pressure change rate detecting section, the frequency adjustment section being further configured to variably set an air pressure change rate threshold value for switching the transmitting frequency from low frequency to high frequency according to the running state.
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Accused Products
Abstract
A tire air pressure detecting device includes an air pressure detecting unit, a transmitting unit, a running state detecting unit, an air pressure change rate detecting section and a frequency adjustment section. The frequency adjustment section is configured to adjust a transmitting frequency at which the detected value of the tire air pressure detected by the air pressure detecting unit is externally transmitted by the transmitting unit according to the running state detected by the running state detecting unit and the air pressure change rate detected by the air pressure change rate detecting section. The frequency adjustment section is further configured to variably set a threshold value for switching the transmitting frequency from low frequency to high frequency according to the running state and the air pressure change rate.
43 Citations
20 Claims
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1. A tire air pressure detecting device comprising:
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an air pressure detecting unit configured and arranged to detect a tire air pressure of a tire mounted to a vehicle; a transmitting unit configured and arranged to transmit a detected value of the tire air pressure detected by the air pressure detecting unit; a running state detecting unit configured and arranged to detect a running state of the vehicle; an air pressure change rate detecting section configured to detect an air pressure change rate at which the tire air pressure changes; and a frequency adjustment section configured to adjust a transmitting frequency at which the detected value of the tire air pressure detected by the air pressure detecting unit is externally transmitted by the transmitting unit according to the running state detected by the running state detecting unit and the air pressure change rate detected by the air pressure change rate detecting section, the frequency adjustment section being further configured to variably set an air pressure change rate threshold value for switching the transmitting frequency from low frequency to high frequency according to the running state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A tire air pressure detecting device adapted to be attached to a wheel of a vehicle to transmit tire air pressure detected by a pressure sensor to a vehicle-side receiver, characterized in that
an air pressure change rate threshold value for switching a transmitting frequency from low frequency to high frequency is variably set based on a detected vehicle running state.
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20. A tire air pressure notification method comprising:
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detecting an air pressure change rate at which a tire air pressure of a tire of a vehicle changes; detecting a state in which the vehicle is running; variably setting, based on the detected vehicle running state, an air pressure change rate threshold value for switching a transmitting frequency between low frequency to high frequency; and transmitting a detected value of the tire air pressure to a vehicle-side receiver at the transmitting frequency.
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Specification