TEMPERATURE DETECTION DEVICE AND ELECTRONIC CONTROL DEVICE EQUIPPED WITH SAME

WIPO Patent Application WO/2020/262096

A1

The present invention provides a temperature detection device that has a simple configuration, and is capable of highly accurate temperature measurement over a wide temperature range.　According to the present invention, an electronic control device is equipped with: an external terminal that is connected to an external temperature sensor; a first resistor that is connected to one end side of the external terminal, and connected in series to the external temperature sensor; a second resistor that is connected in series to the other end side of the first resistor; a MOS transistor that is connected in parallel to the second resistor by connecting the source thereof to one end side of the second resistor and connecting the drain thereof to the other end side of the second resistor; and a temperature measurement unit that measures the temperature from a sensor voltage value, which is the voltage value between the first resistor and the external temperature sensor. The electronic control device is further equipped with an estimation unit that estimates the on-resistance of the MOS transistor from the ratio of the sensor voltage value when the MOS transistor is on to the sensor voltage value when the MOS transistor is off.

KATAGIRI TAKUYA (JP)
FUKUDA TAKAO (JP)
ISHIDA YUJI (JP)

PCT/JP2020/023519

December 30, 2020

June 16, 2020

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

G01K7/25

US6048094A	2000-04-11
JP2011075530A	2011-04-14

TODA Yuji (JP)

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