A method and circuit for estimating the temperature in an internal combustion engine

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, m...

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Bibliographic Details
Main Authors PARISI FILIPPO, LUCANO MASSIMO, CASASSO PAOLO
Format Patent
LanguageChinese
English
Published 25.06.2014
Subjects
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Summary: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 (VRTD) across the sensor resistor (RTD), calculating a resistance value of the sensor resistor (RTD) based on the sensor voltage (VRTD) 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 (R0) in series to a second branch of the current mirror arrangement, measuring a reference voltage (V0) across the reference resistor (R0) and calculating the resistance value of the sensor resistor (RTD) based on the sensor voltage (VRTD) and the reference voltage (V0).
Bibliography:Application Number: CN200910149996