The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2019
Filed:
Mar. 28, 2012
Lary R. Hocken, Davison, MI (US);
Charles S. Nelson, Fenton, MI (US);
Lary R. Hocken, Davison, MI (US);
Charles S. Nelson, Fenton, MI (US);
DELPHI TECHNOLOGIES, INC., Troy, MI (US);
Abstract
A method for determining the temperature of a sensor that comprises a heater is provided. The method includes the steps of applying a voltage to the heater and measuring the voltage applied to the heater and the current through the heater during a first time interval, and removing the applied voltage from the heater and leaving the heater unpowered for a second time interval. The method further includes the steps of calculating the resistance of the heater using the measured voltage and current, and determining the temperature of the sensor from the resistance using a predetermined relationship. The first time interval is selected to be sufficiently short in duration and the second time interval is selected to be sufficiently long so as to not significantly raise the temperature of the heater. The sensor temperature so determined can be used to perform diagnostic functions for a system that includes the sensor.