Measuring and testing – Volume or rate of flow – Thermal type
Reexamination Certificate
2011-06-28
2011-06-28
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
Thermal type
Reexamination Certificate
active
07966877
ABSTRACT:
To determine air mass flows, especially for controlling internal combustion engines, a hot-film air-mass sensor is provided, which may be used especially for sensing air mass flows in the intake tract of an internal combustion engine. The hot-film air-mass sensor has a sensor chip having a sensor frame and a sensor diaphragm having at least one heating element and at least two temperature sensors. Furthermore, the hot-film air-mass sensor has a chip carrier for mounting the sensor chip, as well as at least one additional heating element. The sensor chip is able to be heated up using the at least one additional heating element, which is inserted into the chip carrier. Compared to the usual devices, the hot-film air-mass sensor has a lower susceptibility to contamination, especially by oil films.
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Brueckner Joerg
Gmelin Christoph
Hueftle Gerhard
Illian Matthias
Konzelmann Uwe
Kenyon & Kenyon LLP
Patel Harshad
Robert & Bosch GmbH
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