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公开(公告)号：US20180372520A1
公开(公告)日：2018-12-27
申请号：US15741554
申请日：2016-08-03
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Takahiro YAMAMOTO , Hiroaki HOSHIKA , Takayuki YOGO , Takahiro MIKI , Takeo HOSOKAWA , Yuki ISOYA
CPC classification number: G01F1/6842 , F02D41/18 , F02D2200/0418 , G01F1/68 , G01F1/684 , G01F1/688 , G01F5/00 , G01K1/16 , G01K13/02 , G01K2205/02 , G01N25/56 , G01N27/121
Abstract: The present invention reduces, by optimizing disposition of components on an electronic circuit board, heat transfer from other components mounted on the same board, and improves measurement accuracy of an intake air temperature detection element. A physical quantity detection device of the present invention has an electronic circuit board, which is provided with one or more intake air temperature detection elements (elements having intake air temperature detection function), and which processes electric signals. Furthermore, the physical quantity detection device has a configuration wherein the intake air temperature detection elements, and a power supply regulator having the maximum heat generation quantity are mounted on the same electronic circuit board. The physical quantity detection device is characterized in that the intake air temperature detection elements are disposed on the air flow upstream side of the power supply regulator.
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公开(公告)号：US20170268916A1
公开(公告)日：2017-09-21
申请号：US15532170
申请日：2015-11-02
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Takahiro MIKI , Hiroaki HOSHIKA , Takayuki YOGO , Takahiro YAMAMOTO
CPC classification number: G01F1/684 , G01F1/6842 , G01F5/00 , G01F15/14 , G01M15/042
Abstract: To improve measurement stability of a flow rate detection unit in a physical quantity detection device, a periphery of a synthetic resin material is provided with a protruding section protruding to a cover side. A physical quantity detection device includes a housing, a front cover fixed to the housing, a circuit board housed in the housing, a flow rate detection unit that detects, in a sub-path, the flow rate of a gas to be measured by being attached to the circuit board, a connecting wire that electrically connects the flow rate detection unit to the circuit board, and a synthetic resin material that seals a connecting wire-included connection portion between the circuit board and the flow rate detection unit, the front cover having a protruding section covering at least a part of the synthetic resin material by protruding into the sub-path.
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公开(公告)号：US20210302211A1
公开(公告)日：2021-09-30
申请号：US17057811
申请日：2019-02-13
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Takahiro YAMAMOTO , Tsutomu KONO , Takahiro MIKI , Yuki ISOYA
IPC: G01F1/696
Abstract: It is possible to suppress overcorrection.
A physical quantity detecting device includes: a physical quantity detecting sensor that detects a physical quantity of a measurement target fluid and outputs a detection signal; a compensation amount calculation unit that calculates, by using the detection signal, a lead compensation amount used in lead compensation for the detection signal; and a gain control unit that adjusts the lead compensation amount based on a deviation that is an amount of change in lead compensation amount over time.-
公开(公告)号：US20170370862A1
公开(公告)日：2017-12-28
申请号：US15539799
申请日：2016-01-04
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yuki ISOYA , Hiroaki HOSHIKA , Takayuki YOGO , Takahiro MIKI , Takahiro YAMAMOTO
CPC classification number: G01N25/64 , F02D41/042 , F02D41/144 , F02D41/1494 , F02D41/222 , F02D41/2438 , F02D41/2448 , F02D41/2474 , F02D41/28 , F02D2041/285 , F02D2200/0402 , F02D2200/0414 , F02D2200/0418 , F02M35/10393 , Y02T10/40
Abstract: The present invention obtains a humidity measuring device capable of performing self-diagnosis with high reliability. This humidity measuring device 20 has a diagnosis processing unit 25 for performing self-diagnosis by using gas temperatures and gas humidities before and after a gas in an ambient atmosphere to be measured is heat-controlled. The diagnosis processing unit has a diagnosis start determining unit 26 for determining whether the self-diagnosis can be started on the basis of an exchange state in the ambient atmosphere to be measured and the gas temperature and the gas humidity before the gas in the ambient atmosphere to be measured is heat-controlled, and a diagnosis continuation determining unit 28 for determining whether the self-diagnosis can be continued on the basis of the gas temperature and the gas humidity that are heat-controlled during the self-diagnosis.
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