Title:
PHYSICAL QUANTITY DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/202791
Kind Code:
A1
Abstract:
The present invention obtains a physical quantity detection device capable of reducing the amount of foreign-matter-containing air that is taken in. This physical quantity detection device (20) is characterized in that: the device comprises a housing that is disposed in a main passage through which a gas (2) to be measured flows; the housing comprises a second sub-passage (B) for taking in some of the gas (2) to be measured flowing through the main passage, a circuit chamber (135) having, accommodated therein, a pressure sensor (320) for detecting the pressure of the gas (2) to be measured, and a pressure introduction passage (170) that has one end that opens at an intermediate position along the second sub-passage (B) and another end that opens to the circuit chamber (135) and is capable of introducing the pressure of the gas (2) under measurement from the second sub-passage (B) to the circuit chamber (135); and the pressure introduction passage (170) has an introduction opening (171) disposed at a position offset to the outside from a lateral wall surface (152b) of the second sub-passage (B).
Inventors:
GORAI NOBUAKI (JP)
MIKI TAKAHIRO (JP)
UENODAN AKIRA (JP)
SAITO NAOKI (JP)
MIKI TAKAHIRO (JP)
UENODAN AKIRA (JP)
SAITO NAOKI (JP)
Application Number:
PCT/JP2020/004732
Publication Date:
October 08, 2020
Filing Date:
February 07, 2020
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01K13/02; G01F1/00; G01F1/684; G01L19/00; G01N27/00
Foreign References:
| JP6198955B2 | 2017-09-20 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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