Apparatus for alarming decrease in tire air-pressure and method

Details Apparatus for alarming decrease in tire air-pressure and method Apparatus for alarming decrease in tire air-pressure and method

1998-10-06

2000-05-09

Wu, Daniel J.

Communications: electrical

Land vehicle alarms or indicators

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

340444, 340445, 73146, B60C 2300

Patent

active

060609834

ABSTRACT:
An apparatus for alarming decrease in internal air-pressure of a tire based on rotational information obtained from tires attached to a four-wheeled vehicle. A relative speed ratio of driving wheels at the time of actual running is corrected based on a preliminarily relationship between the relative speed ratio of right and left tires of different types of driving wheels and driving force, and decrease in internal pressure of a tire is determined. The accuracy for determining decrease in internal pressure of a tire can be improved, and erroneous alarm or failure in alarm can be prevented.

REFERENCES:
patent: 5578984 (1996-11-01), Nakajima
patent: 5670716 (1997-09-01), Tamasho et al.
patent: 5699251 (1997-12-01), Mori et al.
patent: 5747686 (1998-05-01), Nishihara et al.
patent: 5753809 (1998-05-01), Ogusu et al.
patent: 5764137 (1998-06-01), Zarkhin
patent: 5828975 (1998-10-01), Isshiki et al.
patent: 5900543 (1999-05-01), Oshiro

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