JPS57175918A - Hot wire type intake air flow device for automobile - Google Patents

Hot wire type intake air flow device for automobile

Info

Publication number
JPS57175918A
JPS57175918A JP56061308A JP6130881A JPS57175918A JP S57175918 A JPS57175918 A JP S57175918A JP 56061308 A JP56061308 A JP 56061308A JP 6130881 A JP6130881 A JP 6130881A JP S57175918 A JPS57175918 A JP S57175918A
Authority
JP
Japan
Prior art keywords
air
hole
chamber
printed substrate
space
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
JP56061308A
Other languages
Japanese (ja)
Inventor
Mitsukuni Tsutsui
Takashi Yoshinari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56061308A priority Critical patent/JPS57175918A/en
Publication of JPS57175918A publication Critical patent/JPS57175918A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects

Abstract

PURPOSE:To ensure waterproofing, by fixing a printed substrate having a flow rate sensor driving circuit to a base having an air exhausting hole, which is provided through a chamber having an air hole and a space. CONSTITUTION:The air hole 22 is provided in the chamber 5 of an intake pipe. The printed substrate 7 is attached to the base 20 having the air exhausting hole through the space 21. The base 20 is provided in the chamber 5. The hot wire sensor 4 for measuring the air flow is provided in a bypass 3 of the intake pipe 1. A current controlling power transistor 8 for the sensor 4 is provided on the printed substrate 7. A shielding metal case 9 is provided on the outer part of the printed substrate 7 through a chamber 5 and packings 10 and 11. In this constitution, the air pressure in the air exhausting hole and the air hole 22 can be adjusted even though the air pressure in the case 9 is changed due to the temperature change in an engine room. Even though the space 21 is filled with water, it can be discharge through the air hole. Therefore perfect waterproofing can be obtained.
JP56061308A 1981-04-24 1981-04-24 Hot wire type intake air flow device for automobile Pending JPS57175918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56061308A JPS57175918A (en) 1981-04-24 1981-04-24 Hot wire type intake air flow device for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56061308A JPS57175918A (en) 1981-04-24 1981-04-24 Hot wire type intake air flow device for automobile

Publications (1)

Publication Number Publication Date
JPS57175918A true JPS57175918A (en) 1982-10-29

Family

ID=13167409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56061308A Pending JPS57175918A (en) 1981-04-24 1981-04-24 Hot wire type intake air flow device for automobile

Country Status (1)

Country Link
JP (1) JPS57175918A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0442238U (en) * 1990-08-08 1992-04-09
US5107812A (en) * 1989-04-14 1992-04-28 Hitachi, Ltd. Thermal type intake air flow measuring instrument and internal combustion engine control apparatus using this measuring instrument
US5201216A (en) * 1990-03-12 1993-04-13 Hitachi, Ltd. Air flow meter for internal combustion engines and a manufacturing method thereof
US5400639A (en) * 1992-09-04 1995-03-28 Ford Motor Company Carrier for mass air flow production line
JP2009019897A (en) * 2007-07-10 2009-01-29 Denso Corp Flow detection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240158B2 (en) * 1972-10-09 1977-10-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240158B2 (en) * 1972-10-09 1977-10-11

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107812A (en) * 1989-04-14 1992-04-28 Hitachi, Ltd. Thermal type intake air flow measuring instrument and internal combustion engine control apparatus using this measuring instrument
US5201216A (en) * 1990-03-12 1993-04-13 Hitachi, Ltd. Air flow meter for internal combustion engines and a manufacturing method thereof
JPH0442238U (en) * 1990-08-08 1992-04-09
US5400639A (en) * 1992-09-04 1995-03-28 Ford Motor Company Carrier for mass air flow production line
JP2009019897A (en) * 2007-07-10 2009-01-29 Denso Corp Flow detection device

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