Sensorless tire pressure estimating method for vehicle with...

Details Sensorless tire pressure estimating method for vehicle with... Sensorless tire pressure estimating method for vehicle with...

2008-07-01

2008-07-01

Allen, Andre J (Department: 2855)

Measuring and testing

Tire, tread or roadway

C701S300000

Reexamination Certificate

active

07392696

ABSTRACT:
Variations in pressure of a pneumatic tire on a vehicle with an anti-lock braking system (ABS) are estimated, without using additional instrumentation, by determining a spring constant K for the wheel while it is in rolling motion by determining angular velocity of the wheel, and then processing timestamp data for the wheel according to a derivative-free formulation of a nonlinear Kalman filter to estimate a spring constant K for the wheel and using variations in the spring constant K to estimate variations in pressure of the tire.

REFERENCES:
patent: 6644105 (2003-11-01), Dieckmann et al.
patent: 2003/0172728 (2003-09-01), Gustafsson et al.
patent: 2005/0030170 (2005-02-01), Rieck et al.
patent: 2007/0219720 (2007-09-01), Trepagnier et al.

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