Brakes – Internal-resistance motion retarder – Magnetic fluid or material
Reexamination Certificate
2006-01-17
2006-01-17
Schwartz, Christopher P. (Department: 3683)
Brakes
Internal-resistance motion retarder
Magnetic fluid or material
Reexamination Certificate
active
06986413
ABSTRACT:
Method for determining a present coil temperature of a coil of a magnetorheological (MR) damper of an operating automotive vehicle, wherein the coil is powered by an output of a controller connected to the coil through a conductor. One step includes calculating a coil-plus-conductor resistance from the voltage and the current of the output of the controller when the controller applies a test current to the coil and the conductor. Another step includes calculating the present coil temperature using at least the coil-plus-conductor resistance and compensating for the resistance of the conductor.
REFERENCES:
patent: 4629967 (1986-12-01), Voss
patent: 5788028 (1998-08-01), Bieber
patent: 6343677 (2002-02-01), Bell
Fedders Brandon J.
Mwangi Roy
Shal David Andrew
Tsui David C
Delphi Technologies Inc.
Schwartz Christopher P.
Smith Michael D.
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