JPS59185624U - Protection circuit for hot wire flowmeter - Google Patents

Protection circuit for hot wire flowmeter

Info

Publication number
JPS59185624U
JPS59185624U JP7905483U JP7905483U JPS59185624U JP S59185624 U JPS59185624 U JP S59185624U JP 7905483 U JP7905483 U JP 7905483U JP 7905483 U JP7905483 U JP 7905483U JP S59185624 U JPS59185624 U JP S59185624U
Authority
JP
Japan
Prior art keywords
flowmeter
relay
protection circuit
battery
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7905483U
Other languages
Japanese (ja)
Inventor
狩野　英樹
Original Assignee
日本電子機器株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電子機器株式会社 filed Critical 日本電子機器株式会社
Priority to JP7905483U priority Critical patent/JPS59185624U/en
Publication of JPS59185624U publication Critical patent/JPS59185624U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の熱線式流量計を示す回路図、第　　−２
図は本考案の一実施例を示す回路図である。 １・・・熱線抵抗、８・・・ツェナダイオード、１０・
・・イグニッションリレー、１０ａ・・・リレーコイル
、１０ｂ・・・リレー接点、１１・・・バッテリ、２０
・・・ダイオード。Figure 1 is a circuit diagram showing a conventional hot wire flowmeter, Figure 2
The figure is a circuit diagram showing an embodiment of the present invention. 1... Hot wire resistance, 8... Zener diode, 10...
...Ignition relay, 10a...Relay coil, 10b...Relay contact, 11...Battery, 20
···diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 吸気通路に配設され吸入空気の流速により変化する抵抗
値に基ついて吸入空気量を検出する熱線式流量計をバッ
テリにリレー接点を介して直列接続すると共に前記流量
計に当該流量計に印加される電圧を一定電圧に保つツェ
ナダイオードを並列接続し、前記バッテリにエンジンキ
ースイッチを介して接続されたリレーのコイルを励磁す
ることにより前記リレー接点を閉結し前記流量計にバッ
テリ電圧を印加するようにし・た熱線式流量計の電源供
給回路において、前記リレーのコイルに、前−記バツテ
リの土掻側にアノード端子を向けたダイオードを、直列
接続したことを特徴とする熱線式流量計の保護回路。A hot-wire flowmeter, which is disposed in the intake passage and detects the amount of intake air based on a resistance value that changes depending on the flow velocity of the intake air, is connected in series to the battery via a relay contact, and a current is applied to the flowmeter. A Zener diode is connected in parallel to maintain the voltage at a constant voltage, and a coil of a relay connected to the battery via an engine key switch is energized to close the relay contact and apply battery voltage to the flowmeter. In the power supply circuit for the hot-wire flowmeter, a diode having an anode terminal facing the soil scraping side of the battery is connected in series to the coil of the relay. protection circuit.
JP7905483U 1983-05-27 1983-05-27 Protection circuit for hot wire flowmeter Pending JPS59185624U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7905483U JPS59185624U (en) 1983-05-27 1983-05-27 Protection circuit for hot wire flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7905483U JPS59185624U (en) 1983-05-27 1983-05-27 Protection circuit for hot wire flowmeter

Publications (1)

Publication Number Publication Date
JPS59185624U true JPS59185624U (en) 1984-12-10

Family

ID=30209057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7905483U Pending JPS59185624U (en) 1983-05-27 1983-05-27 Protection circuit for hot wire flowmeter

Country Status (1)

Country Link
JP (1) JPS59185624U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015031639A (en) * 2013-08-06 2015-02-16 日立オートモティブシステムズ株式会社 Sensor device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5027935A (en) * 1973-07-16 1975-03-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5027935A (en) * 1973-07-16 1975-03-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015031639A (en) * 2013-08-06 2015-02-16 日立オートモティブシステムズ株式会社 Sensor device

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