JP4154125B2 - 熱式空気流量計 - Google Patents
熱式空気流量計 Download PDFInfo
- Publication number
- JP4154125B2 JP4154125B2 JP2000612709A JP2000612709A JP4154125B2 JP 4154125 B2 JP4154125 B2 JP 4154125B2 JP 2000612709 A JP2000612709 A JP 2000612709A JP 2000612709 A JP2000612709 A JP 2000612709A JP 4154125 B2 JP4154125 B2 JP 4154125B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- heating
- air flow
- heating resistor
- temperature
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
-
- 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
- G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
- G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
- G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
- G01F1/692—Thin-film arrangements
-
- 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
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
-
- 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
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
- G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
Description
Claims (2)
- 内燃機関の吸入空気流中に設けられた2つの抵抗体と、前記2つの抵抗体の電位差を制御するブリッジ回路と、前記抵抗体の加熱時間を制限する回路手段とを備えた熱式空気流量計において、
前記抵抗体の加熱温度を求める手段を備え、
前記回路手段は、電源投入時において、前記抵抗体の一定時間あたりの温度変化が所定値より小さく、かつ前記抵抗体の発熱温度が目標とする温度範囲以下である場合に、加熱時間を制限することを特徴とする熱式空気流量計。 - 請求項1に記載の熱式空気流量計において、
前記抵抗体がシリコン基板上に形成されたことを特徴とする熱式空気流量計。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1999/002032 WO2000063656A1 (fr) | 1999-04-16 | 1999-04-16 | Débitmètre d'air à fil chaud et moteur à combustion interne |
Publications (1)
Publication Number | Publication Date |
---|---|
JP4154125B2 true JP4154125B2 (ja) | 2008-09-24 |
Family
ID=14235491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000612709A Expired - Lifetime JP4154125B2 (ja) | 1999-04-16 | 1999-04-16 | 熱式空気流量計 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP4154125B2 (ja) |
WO (1) | WO2000063656A1 (ja) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61102522A (ja) * | 1984-10-25 | 1986-05-21 | Japan Electronic Control Syst Co Ltd | 内燃機関の熱線式空気流量計 |
JPS62123318A (ja) * | 1985-08-13 | 1987-06-04 | Nippon Soken Inc | 直熱型流量センサ |
JPH0448221A (ja) * | 1990-06-15 | 1992-02-18 | Aisan Ind Co Ltd | 吸入空気量検出装置 |
-
1999
- 1999-04-16 WO PCT/JP1999/002032 patent/WO2000063656A1/ja active Application Filing
- 1999-04-16 JP JP2000612709A patent/JP4154125B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO2000063656A1 (fr) | 2000-10-26 |
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