Tire pressure drop alarm device sensing partial travel on irregu

Details Tire pressure drop alarm device sensing partial travel on irregu Tire pressure drop alarm device sensing partial travel on irregu

1996-01-29

1997-02-18

O'Shea, Sandra L.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

340444, B60C 2302

Patent

active

056043074

ABSTRACT:
A tire pressure drop alarm device for judging a pneumatic pressure drop by calculating rotational angular velocities of tires provided for a four-wheel vehicle. When the vehicle is traveling on a road which varies in condition between left and right sides, a front/rear ratio of rotational angular velocities of the tires at the shoulder side of the road changes more markedly than that of rotational angular velocities of the tires at the center side, and a large time differential value appears. Therefore, it is possible to judge the traveling condition of the vehicle when the road condition varies between left and right sides. When it is judged that the traveling condition of the vehicle encounters a road condition which varies between left and right sides, the tire rotation of the four wheels is likely to become unbalanced, giving a false alarm even if the tire pressure does not drop. In this case, the judgment by the pneumatic pressure drop judging means is inhibited to prevent an issuance of a false alarm.

REFERENCES:
patent: 3691524 (1972-09-01), Frost et al.
patent: 4876528 (1989-10-01), Walker et al.
patent: 5343741 (1994-09-01), Nishihara et al.

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