The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2022
Filed:
Jan. 23, 2020
Hitachi Astemo, Ltd., Hitachinaka, JP;
Akira Uenodan, Hitachinaka, JP;
Satoshi Noda, Hitachinaka, JP;
Naoki Saito, Hitachinaka, JP;
Masamichi Nakamura, Tokyo, JP;
Takahiro Miki, Hitachinaka, JP;
Nobuaki Gorai, Hitachinaka, JP;
Takayuki Ishikawa, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Provided is a physical quantity detection device capable of improving noise performance of a flow rate detection unit as compared with the related art. The physical quantity detection deviceincludes a plate-like chip packagethat is arranged to protrude from the flow path of the measurement target gas and has a width W along the flow direction of the measurement target gas. The chip packageincludes a flow rate detection unit, an accelerating flow path, a measurement surface, a non-measurement surface, and a separation flow portion. The cross sectional area of the accelerating flow pathis reduced, and the flow rate detection unitis arranged. The separation flow portionpartitions the second sub-passageinto a measurement flow path facing the measurement surfaceand a non-measurement flow path facing the non-measurement surface. In the width direction Dw of the chip package, the end portionof the accelerating flow pathand the end portionof the separation flow portionare separated from each other.