Physical quantity detection device

United States of America

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Abstract

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The purpose is to enhance the measurement stability of a flow rate detection unit in a physical quantity detection device by branching an auxiliary passage in which the flow rate detection unit is disposed into first to third passages and providing the third flow passage at an upstream part of the second flow passage. A physical quantity detection device has a circuit board provided with at least one detection unit for detecting the physical quantity of a gas flowing through a main passage and a circuit unit for computational processing of the physical quantity detected by the detection unit, a housing for accommodating the circuit board, a cover fixed to the housing, and an auxiliary passage formed by both the housing and cover that is configured to branch passages from a first passage to a third passage.

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Patent Owner(s)

Patent OwnerAddress
HITACHI AUTOMOTIVE SYSTEMS LTDJP2520 TAKABA HITACHINAKA-SHI IBARAKI

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Inventor(s)

Inventor Name Address
SAITO NAOKI OHTA-KU TOKYO 146-8501
MIKI TAKAHIRO 〒3128503 茨城県ひたちなか市高場2520番地 日立オートモティブシステムズ株式会社内 IBARAKI ?3128503
YOGO TAKAYUKI 〒3128503 茨城県ひたちなか市高場2520番地 日立オートモティブシステムズ株式会社内 IBARAKI ?3128503
HOSHIKA HIROAKI 〒3128503 茨城県ひたちなか市高場2520番地 日立オートモティブシステムズ株式会社内 IBARAKI ?3128503
HOSOKAWA TAKEO HITACHINAKA-SHI IBARAKI 312-8503

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