Physical quantity measuring device
AssigneeHitachi Automotive Systems, Ltd.
InventorsYuki Isoya, Hiroaki Hoshika, Takayuki Yogo, Takahiro Miki
Life of this patent
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Abstract
A physical quantity measuring device includes a chip package and a casing. The casing fixedly stores the chip package. The casing includes a first bypass passage allowing a gas to be measured taken from a main passage, to flow in a first measuring unit, and a second bypass passage allowing the gas to be measured taken from the main passage, to flow in a second measuring unit. The chip package is configured to dispose a signal processing unit between the first and second measuring units. The casing has a cooling unit that allows the gas to be measured from the main passage to flow between the first measuring unit and the second measuring unit, and cooling the signal processing unit.
Claims8
A physical quantity measuring device comprising:
- a chip package molded from a polymeric resin, including a first measuring unit measuring a first physical quantity of a gas to be measured taken from a main passage, a second measuring unit measuring a second physical quantity of the gas to be measured taken from the main passage, and a signal processing unit being connected to the first and second measuring units, the signal processing unit processing signals transmitted from at least the first and second measuring units;
- and
- a casing fixedly storing the chip package, and including a first bypass passage allowing the gas to be measured taken from the main passage, to flow in the first measuring unit, and a second bypass passage allowing the gas to be measured taken from the main passage, to flow in the second measuring unit,
- the chip package being configured to dispose the signal processing unit between the first and second measuring units,
- the casing having a cooling unit allowing the gas to be measured from the main passage to flow between the first measuring unit and the second measuring unit, and cooling the signal processing unit.
Dependencies are inferred from the claim text.