Title:
物理量検出装置
Document Type and Number:
Japanese Patent JP7097333
Kind Code:
B2
Abstract:
In the physical quantity detection device, the occurrence of the measurement error is reduced by suppressing the flow bias in the sub-passage and reducing the resistance in the passage. A physical quantity detection device 30 of the present invention includes a measuring portion 310 disposed in a main passage, a sub-passage 330 that takes a gas to be measured from the main passage, a support member 603 that divides a part of the sub-passage into two flow paths of one surface side and the other surface side in a direction intersecting a passage width direction, and a flow rate detection element 602 disposed on one surface of the support member. The sub-passage includes a straight portion 321 in which the support member is disposed and a downstream curved portion 322 that is curved to one side in the passage width direction of the straight portion. The straight portion is provided with a dividing wall 500 that divides the flow path on the other surface side of the support member into two flow paths on one side and the other side in the passage width direction, and a cross-sectional area of the flow path on one side in the passage width direction is smaller than a cross-sectional area of the flow path on the other side in the passage width direction.
Inventors:
Masamichi Nakamura
Uenodan Akatsuki
Takahiro Miki
Nobuaki Gorai
Nao Saito
Takayuki Ishikawa
Uenodan Akatsuki
Takahiro Miki
Nobuaki Gorai
Nao Saito
Takayuki Ishikawa
Application Number:
JP2019117082A
Publication Date:
July 07, 2022
Filing Date:
June 25, 2019
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
G01F1/684
Domestic Patent References:
| JP2011122962A | ||||
| JP2018205071A | ||||
| JP2020003294A |
Foreign References:
| WO2016047243A1 |
Attorney, Agent or Firm:
Hiraki International Patent Office