Title:
PHYSICAL QUANTITY DETECTOR
Document Type and Number:
WIPO Patent Application WO/2020/003808
Kind Code:
A1
Abstract:
Provided is a physical quantity detector that makes it possible to reduce dust flowing into a second sub-passage that branches off from a first sub-passage, and improve fouling resistance. The physical quantity detector 20 detects the physical quantity of a gas. A measuring unit 213 comprises a first sub-passage 234a that extends from an inlet 231 along a center axis of a main passage to a first outlet 232, a second sub-passage 234b that branches from the first sub-passage 234a toward a flange 211 and leads to a second outlet 233, and a flow-regulating surface 227. The flow-regulating surface 227 comprises an upstream flow-regulating surface 227a provided so as to approach the flange 211 from an upstream end face 228 toward the downstream side of the main passage, and a downstream flow-regulating surface 227b that is provided further downstream of the main passage than the upstream flow-regulating surface 227a and extends along the center axis of the main passage to a downstream end face 224.
Inventors:
NAKAMURA MASAMICHI (JP)
FUKAYA MASASHI (JP)
UENODAN AKIRA (JP)
TASHIRO SHINOBU (JP)
KONO TSUTOMU (JP)
SAITO TOMOAKI (JP)
SAITO NAOKI (JP)
FUKAYA MASASHI (JP)
UENODAN AKIRA (JP)
TASHIRO SHINOBU (JP)
KONO TSUTOMU (JP)
SAITO TOMOAKI (JP)
SAITO NAOKI (JP)
Application Number:
PCT/JP2019/019852
Publication Date:
January 02, 2020
Filing Date:
May 20, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01F1/684
Domestic Patent References:
| WO2003008913A1 | 2003-01-30 |
Foreign References:
| JP2017053787A | 2017-03-16 | |||
| JP2014001929A | 2014-01-09 | |||
| JP2004507754A | 2004-03-11 | |||
| JP2005140753A | 2005-06-02 | |||
| JP2019066329A | 2019-04-25 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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