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:
Sep. 11, 2012
Filed:
Jun. 26, 2009
Paolo Casasso, Cuneo, IT;
Massimo Lucano, Alessandria, IT;
Filippo Parisi, Turin, IT;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method is provided for estimating the temperature in an internal combustion engine. The method includes, but is not limited to the steps of providing a sensor resistor (RTD) in the internal combustion engine, the sensor resistor (RTD) having a predetermined resistance-temperature characteristic, measuring a sensor voltage (V) across the sensor resistor (RTD), calculating a resistance value of the sensor resistor (RTD) based on the sensor voltage (V) and estimating the temperature using the resistance value and the resistance-temperature characteristic. The method further comprises the steps of connecting, in series to the sensor resistor (RTD), a first branch of a current mirror arrangement, connecting a reference resistor (R) in series to a second branch of the current mirror arrangement, measuring a reference voltage (V) across the reference resistor (R) and calculating the resistance value of the sensor resistor (RTD) based on the sensor voltage (V) and the reference voltage (V).