Tire pressure monitoring system

Details Tire pressure monitoring system Tire pressure monitoring system

2007-04-17

2007-04-17

Nguyen, Cuong (Department: 3661)

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

C701S029000, C073S146200

Reexamination Certificate

active

10867444

ABSTRACT:
A vehicle C is provided with four wheel speed sensors VS (VSfl, VSfr, VSrl, VSrr) (wheel vibration detection means) for detecting wheel speed V (Vfl, Vfr, Vrl, Vrr) at respective four wheels W (left and right front wheels Wfl, Wfr and left and right rear wheels Wrl, Wrr). When the tire pressure is in the normal value, a tire pressure monitoring system1prepares vibration frequency reference spectrum data for predetermined vehicle speed bands based on the detection values of each wheel speed sensor VS. The tire pressure monitoring system1compares the current vibration frequency spectrum data and the vibration frequency reference spectrum data corresponding to the current vehicle speed band, and determines that the tire is underinflated if the comparison result exceeds a predetermined value.

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