JPH0310221U - - Google Patents
Info
- Publication number
- JPH0310221U JPH0310221U JP7118089U JP7118089U JPH0310221U JP H0310221 U JPH0310221 U JP H0310221U JP 7118089 U JP7118089 U JP 7118089U JP 7118089 U JP7118089 U JP 7118089U JP H0310221 U JPH0310221 U JP H0310221U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- constant voltage
- temperature
- bridge circuit
- temperature detection
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案の内燃機関の制御装置の構成を
示すブロツク図、第２図は本考案の内燃機関の制
御装置の全体構成図、第３図及び第４図は第２図
の制御回路の機関起動後の制御手順を示すフロー
チヤート、第５図及び第６図は起動からの時間と
エアフローメータの出力電圧特性を通常時と氷結
時とを対比させて示す図である。
１…機関、３…熱線式エアフローメータ、３ａ
…センサ、３ｂ…駆動回路、１０…制御回路、１
５…イグニツシヨンスイツチ、ＲＨ…ヒータ抵抗
、ＲＢ…バーンオフ抵抗、ＲＫ…温度測定用抵抗
。
FIG. 1 is a block diagram showing the configuration of the internal combustion engine control device of the present invention, FIG. 2 is an overall configuration diagram of the internal combustion engine control device of the present invention, and FIGS. 3 and 4 are the control circuits of FIG. 2. FIGS. 5 and 6 are flowcharts showing the control procedure after the engine is started, and are diagrams showing the time from the start and the output voltage characteristics of the air flow meter in a normal state and in an icy state. 1... Engine, 3... Hot wire air flow meter, 3a
...Sensor, 3b...Drive circuit, 10...Control circuit, 1
5...Ignition switch, RH...Heater resistance, RB...Burn-off resistance, RK...Resistance for temperature measurement.
Claims (1)
型熱式空気流量計であつて、制御用ヒータ抵抗と
温度検出用抵抗とを含むブリツジ回路と、前記ヒ
ータ抵抗に近接するバーンオフ用抵抗と、前記ブ
リツジ回路に所定のトリガ信号によつて定電圧を
印加し、前記ヒータ抵抗の温度が温度検出用抵抗
の温度より一定温度だけ高くなつた時に定電圧の
印加を停止して、定電圧印加時間に基づいて吸入
空気量を検出する制御回路とを備え、 前記制御回路は定電圧印加時間が予め設定した
基準値より大きい時に前記制御用ヒータ抵抗また
はバーンオフ抵抗に急速加熱電流を供給すること
を特徴とするパルス駆動型熱式空気流量計。[Claims for Utility Model Registration] A pulse-driven thermal air flow meter installed in an intake passage of an internal combustion engine, which comprises a bridge circuit including a control heater resistor and a temperature detection resistor, and a bridge circuit that includes a control heater resistor and a temperature detection resistor; A constant voltage is applied to the adjacent burn-off resistor and the bridge circuit according to a predetermined trigger signal, and the application of the constant voltage is stopped when the temperature of the heater resistor becomes higher than the temperature of the temperature detection resistor by a certain temperature. and a control circuit that detects the amount of intake air based on the constant voltage application time, and the control circuit rapidly heats the control heater resistor or burn-off resistor when the constant voltage application time is greater than a preset reference value. A pulse-driven thermal air flow meter that supplies current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7118089U JPH0310221U (en) | 1989-06-20 | 1989-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7118089U JPH0310221U (en) | 1989-06-20 | 1989-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310221U true JPH0310221U (en) | 1991-01-31 |
Family
ID=31607979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7118089U Pending JPH0310221U (en) | 1989-06-20 | 1989-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0310221U (en) |
-
1989
- 1989-06-20 JP JP7118089U patent/JPH0310221U/ja active Pending
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