Low tire warning system with axle torque signal

Details Low tire warning system with axle torque signal Low tire warning system with axle torque signal

1998-11-04

1999-12-14

Lefkowitz, Edward

Communications: electrical

Land vehicle alarms or indicators

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

340438, 340443, 340444, 731462, 731465, 364424034, B60C 2300

Patent

active

060023279

ABSTRACT:
A system and method that monitors four wheel sensors of an automotive vehicle to determine changes in the effective rolling radii of any wheel and a low pressure tire condition. Certain vehicle operating conditions, such as excessive or very low speeds, driven wheel torque, braking, and turns, are determined from the sensor outputs and are used to prevent erroneous detection of changes in effective rolling radius. Data from the sensors that is determined to be acceptable is accumulated over time as displacement values for each wheel. When the displacement values exceed a predetermined value, a metric function is used to compare differences detected in accumulated displacement values for the front pair of wheels and for the rear pair of wheels. If the difference between compared pairs of wheels is excessive, as compared with a predetermined baseline metric value, a low tire condition is detected. Further accumulation of instances where the metric indicates a detected condition, provides confidence that the condition actually exists and a warning is provided to the vehicle operator. Resetting of the system and the baseline metric is performed when the low tire condition is corrected or when the tires are checked and properly inflated.

REFERENCES:
patent: 3526873 (1970-09-01), Burt
patent: 3613075 (1971-10-01), Griffiths et al.
patent: 3691524 (1972-09-01), Frost et al.
patent: 4149140 (1979-04-01), Evans et al.
patent: 4458535 (1984-07-01), Juergens
patent: 4567460 (1986-01-01), Gebler
patent: 4574267 (1986-03-01), Jones et al.
patent: 4777611 (1988-10-01), Tashiro et al.
patent: 4876528 (1989-10-01), Walker et al.
patent: 5192929 (1993-03-01), Walker et al.
patent: 5218862 (1993-06-01), Hurrell, II et al.
patent: 5239469 (1993-08-01), Walker et al.
patent: 5252946 (1993-10-01), Walker et al.
patent: 5343741 (1994-09-01), Nishihara et al.
patent: 5345217 (1994-09-01), Prottey
patent: 5442331 (1995-08-01), Kishimoto et al.
patent: 5497657 (1996-03-01), Taguchi et al.
patent: 5513523 (1996-05-01), Sekiya et al.
patent: 5525960 (1996-06-01), McCall et al.
patent: 5541573 (1996-07-01), Jones
patent: 5721528 (1998-02-01), Boesch et al.
patent: 5847645 (1998-12-01), Boesch
Kevin Jost, "1997 Pontiac Grank Prix sedan", Automotive Engineering, Apr. 1996, p. 65-66 1995 Japan Market Mitsubishi Diamante, Service Manual, Translated.

Affiliated with

Also associated with

Rating

Low tire warning system with axle torque signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low tire warning system with axle torque signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low tire warning system with axle torque signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-867337