Method and device for determining filling pressure loss of a pne

Details Method and device for determining filling pressure loss of a pne Method and device for determining filling pressure loss of a pne

1995-01-13

1996-10-01

Peng, John K.

Communications: electrical

Land vehicle alarms or indicators

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

340438, 340442, 340671, 731462, 36442403, 36442602, B60C 2302

Patent

active

055614159

ABSTRACT:
In a method for determining pressure loss in a pneumatic vehicle tire on a driven axle of a vehicle the rotational velocities of the wheels are measured and slip values for the driven wheels are calculated therefrom. Simultaneously, wheel drive forces of the vehicle for the calculated slip values are determined. The wheel drive forces and the corresponding calculated slip values are correlated and a characteristic curve is produced. The characteristic curve is compared to a predetermined characteristic curve range and a warning signal is generated when the characteristic curve is outside the predetermined characteristic range. The device for performing the method has sensors for measuring the rotational velocities of the wheels. A device for determining slip of the driven wheels from the measured rotational velocity is provided. A device for determining the wheel driven forces is present. Furthermore, a device for determining the actual characteristic curve by approximation by correlating the wheel drive forces and the slip is provided. A device for inputting and memorizing a maximum slope limit of a predetermined characteristic curve range is provided. Another device compares the slope of the actual characteristic curve to the maximum slope limit and emits a warning signal when the slope of the actual characteristic curve surpasses the maximum slope limit.

REFERENCES:
patent: 4567460 (1986-01-01), Gabler
patent: 5218862 (1993-06-01), Hurrell, II et al.
patent: 5327346 (1994-07-01), Goodell
patent: 5345217 (1994-09-01), Prottey
patent: 5442331 (1995-08-01), Kishimoto et al.

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