JPS61182818U - - Google Patents
Info
- Publication number
- JPS61182818U JPS61182818U JP6687685U JP6687685U JPS61182818U JP S61182818 U JPS61182818 U JP S61182818U JP 6687685 U JP6687685 U JP 6687685U JP 6687685 U JP6687685 U JP 6687685U JP S61182818 U JPS61182818 U JP S61182818U
- Authority
- JP
- Japan
- Prior art keywords
- hot wire
- flow rate
- detection
- resistor
- energization
- 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
Links
- 238000001514 detection method Methods 0.000 claims 8
- 238000002485 combustion reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は第１図の各部の信号波形図、第３図は従来例
を示す回路図である。
１１……熱線抵抗、１６……比較器、１７……
フリツプフロツプ、２０……発振器、２３……第
１トランジスタ、２６……第２トランジスタ、３
０……パワートランジスタ、３１……第３トラン
ジスタ、４０……第４トランジスタ、４１……差
動増幅器、４６……第５トランジスタ、５１……
第６トランジスタ、５６……ツエナーダイオード
。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a signal waveform diagram of each part of FIG. 1, and FIG. 3 is a circuit diagram showing a conventional example. 11...Hot wire resistance, 16...Comparator, 17...
Flip-flop, 20... oscillator, 23... first transistor, 26... second transistor, 3
0... Power transistor, 31... Third transistor, 40... Fourth transistor, 41... Differential amplifier, 46... Fifth transistor, 51...
Sixth transistor, 56... Zener diode.
Claims (1)
該熱線抵抗への通電をオンオフ制御するスイツチ
ング手段と、吸気流量検出開始用の信号を所定周
期で出力する検出開始信号発生手段と、前記熱線
抵抗の抵抗値を検出し該検出値が所定値になつた
ときに吸気流量検出終了用の信号を出力する検出
終了信号発生手段と、前記検出開始信号発生手段
から吸気流量検出開始用の信号が入力されたとき
に前記スイツチング手段をオン動作させて熱線抵
抗への通電を開始する一方、前記検出終了信号発
生手段からの吸気流量検出終了用の信号が入力さ
れたときに前記スイツチング手段をオフ動作させ
て熱線抵抗への通電を停止する通電時間制御手段
とを備え、熱線抵抗への通電時間から吸入空気流
量を検出するように構成され、前記熱線抵抗の両
端に並列に接続することにより該熱線抵抗への印
加電圧を一定以下に制限する定電圧素子を備えた
ことを特徴とする内燃機関の熱線式流量計。 A hot wire resistance installed in the intake passage of an internal combustion engine,
switching means for controlling on/off energization of the hot wire resistor; detection start signal generating means for outputting a signal for starting intake flow rate detection at a predetermined period; detecting a resistance value of the hot wire resistor until the detected value reaches a predetermined value; a detection end signal generating means for outputting a signal for terminating intake flow rate detection when the intake air flow rate becomes low; and when a signal for starting intake flow rate detection is inputted from the detection start signal generating means, the switching means is turned on to turn on the hot wire. energization time control means for starting energization to the resistor and turning off the switching means to stop energization to the hot wire resistor when a signal for terminating intake flow rate detection is input from the detection end signal generating means; and a constant voltage element configured to detect the intake air flow rate from the energization time to the hot wire resistor, and which is connected in parallel to both ends of the hot wire resistor to limit the voltage applied to the hot wire resistor to below a certain level. A hot wire flowmeter for an internal combustion engine, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6687685U JPS61182818U (en) | 1985-05-08 | 1985-05-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6687685U JPS61182818U (en) | 1985-05-08 | 1985-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61182818U true JPS61182818U (en) | 1986-11-14 |
Family
ID=30600176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6687685U Pending JPS61182818U (en) | 1985-05-08 | 1985-05-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61182818U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57211015A (en) * | 1981-06-22 | 1982-12-24 | Anima Kk | Heat pulse type thermometer |
-
1985
- 1985-05-08 JP JP6687685U patent/JPS61182818U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57211015A (en) * | 1981-06-22 | 1982-12-24 | Anima Kk | Heat pulse type thermometer |
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