Detecting water ingress in electronic power steering systems

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United States of America Patent

PATENT NO 11904959
APP PUB NO 20230110917A1
SERIAL NO

17496032

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Systems and methods are provided for detecting water within an electronic power steering assembly. A sensor assembly includes a resistor and a water-sensitive capacitor arranged to provide a series resistor-capacitor (RC) network having a cut-off frequency that is a function of a capacitance of the water-sensitive capacitor. An oscillator provides an excitation to the series RC network having a known frequency, such that the series RC network provides an output in response to the excitation. An envelope detector receives the output of the series RC network and generates an output representing an amplitude of the output of the series RC network. A microcontroller determines if water is present within the electronic power steering assembly from the amplitude of the output of the series RC network.

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Patent Owner(s)

Patent OwnerAddress
ZF ACTIVE SAFETY AND ELECTRONICS US LLC12001 TECH CENTER DRIVE LIVONIA MI 48150

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ali, Mohammad Ashraf Macomb, IN 13 28
Ghafari, Abraham Rochester Hills, US 2 0

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