JPS5764109A - Measuring equipment for air flow rate of internal combustion engine - Google Patents

Measuring equipment for air flow rate of internal combustion engine

Info

Publication number
JPS5764109A
JPS5764109A JP55139803A JP13980380A JPS5764109A JP S5764109 A JPS5764109 A JP S5764109A JP 55139803 A JP55139803 A JP 55139803A JP 13980380 A JP13980380 A JP 13980380A JP S5764109 A JPS5764109 A JP S5764109A
Authority
JP
Japan
Prior art keywords
air
air flow
inlet
outlet
path
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.)
Granted
Application number
JP55139803A
Other languages
Japanese (ja)
Other versions
JPH0241688B2 (en
Inventor
Yutaka Nishimura
Hiroshi Kuroiwa
Minoru Osuga
Teruo Yamauchi
Takashige Ooyama
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 JP55139803A priority Critical patent/JPS5764109A/en
Publication of JPS5764109A publication Critical patent/JPS5764109A/en
Publication of JPH0241688B2 publication Critical patent/JPH0241688B2/ja
Granted 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

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

PURPOSE:To measure air flow rates with high accuracy irrespectively of the operating condition, by shortening the distance between the air inlet and air outlet of the by-pass path for executing the hot-wire type air flow rate measurement, and, at the same time, by extending the length of the by-pass path, so that influence of the back flow is prevented. CONSTITUTION:At a flow straightening section arising from a Venturi 2 of an air conduit 1, a partition wall 22 which forms an air inlet 4, an air outlet 10, and an air path 5, a resistance body 6 for hot-wire type air flow speed measurement, a resistance body for temperature compensation, and a flow speed measuring tube 3 provided with a straightening lattice, etc., are installed at right angle to the air flow. Because of this constitution, the distance between the inlet 4 and the outlet is shortened and the pressure difference between the inlet 4 and the outlet 10 becomes smaller. Moreover, the length of the path 5 is extended and the inertia of the straightened air flow becomes larger. Therefore, the air flow of internal combustion engines is highly accurately measured without having any influence from back flows, even when back flows are generated by the operating condition of engines. Moreover, when a ring- shaped air inlet 4 is installed to the wall of the path 1, the distance between the inlet 4 and the outlet 10 is substantially shortened and, at the same time, the air flow is excellently straightened and therefore, the same result can be obtained.
JP55139803A 1980-10-08 1980-10-08 Measuring equipment for air flow rate of internal combustion engine Granted JPS5764109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139803A JPS5764109A (en) 1980-10-08 1980-10-08 Measuring equipment for air flow rate of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139803A JPS5764109A (en) 1980-10-08 1980-10-08 Measuring equipment for air flow rate of internal combustion engine

Publications (2)

Publication Number Publication Date
JPS5764109A true JPS5764109A (en) 1982-04-19
JPH0241688B2 JPH0241688B2 (en) 1990-09-19

Family

ID=15253792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139803A Granted JPS5764109A (en) 1980-10-08 1980-10-08 Measuring equipment for air flow rate of internal combustion engine

Country Status (1)

Country Link
JP (1) JPS5764109A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828623A (en) * 1981-08-01 1983-02-19 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Measuring device for quantity of air
JPH03205514A (en) * 1990-01-08 1991-09-09 Japan Electron Control Syst Co Ltd Air flow rate detector for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828623A (en) * 1981-08-01 1983-02-19 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Measuring device for quantity of air
JPH03205514A (en) * 1990-01-08 1991-09-09 Japan Electron Control Syst Co Ltd Air flow rate detector for internal combustion engine

Also Published As

Publication number Publication date
JPH0241688B2 (en) 1990-09-19

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