Airflow meter
AssigneeHitachi Automotive Systems, Ltd.
InventorsRyo Sato, Masahiro Matsumoto, Satoshi Asano, Akira Kotabe, Kazunori Suzuki
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Abstract
Provided is an airflow meter with good precision. In the airflow meter, which is provided with an arithmetic circuit that incorporates air temperature and a sensor module temperature as adjustment elements for the output characteristics of the airflow meter, corrects the output characteristics in accordance with the temperature difference between the air temperature and the sensor module temperature and reduces the correction amount when the absolute value of the difference between the air temperature and the sensor module temperature is small.
Claims6
An air flow meter comprising an arithmetic circuit that corrects an output, wherein:
- the arithmetic circuit is configured to incorporate an air temperature and a sensor module temperature as adjustment factors for an output characteristic of the air flow meter,
- the output characteristic is corrected in accordance with a temperature difference between the air temperature and the sensor module temperature, and
- a correction amount is decreased in comparison to a correction amount indicated by a primary characteristic when an absolute value of the difference between the air temperature and the sensor module temperature is smaller than a threshold.
Dependencies are inferred from the claim text.