JPH0427137U - - Google Patents
Info
- Publication number
- JPH0427137U JPH0427137U JP6858990U JP6858990U JPH0427137U JP H0427137 U JPH0427137 U JP H0427137U JP 6858990 U JP6858990 U JP 6858990U JP 6858990 U JP6858990 U JP 6858990U JP H0427137 U JPH0427137 U JP H0427137U
- Authority
- JP
- Japan
- Prior art keywords
- internal combustion
- combustion engine
- intake air
- circuit
- time constant
- 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 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 2
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Volume Flow (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案に係る内燃機関用熱線式流量計
の一実施例を示す回路図、第２図は同上実施例に
おけるポテンシヨンメータの構造を示す斜視図、
第３図は同上実施例における平均流量検出電圧Ｖ
ａの波形を示す図、第４図は従来の内燃機関用熱
線式流量計の一例を示す回路図、第５図ａは検出
電圧Ｖ１の波形を、同図ｂは平均流量検出電圧Ｖ
ａの波形を、夫々示す図である。
１……ブリツジ回路、１１……コントロールユ
ニツト、１２……マイクロコンピユータ、２０…
…時定数回路、２１……スロツトルバルブ、２１
ａ……バルブシャフト、２２……ポテンシヨンメ
ータ、２３……抵抗器、２４……ブラシ、Ｒｈ…
…熱線、Ｔ１，Ｔ２……電源端子、Ｔ３，Ｔ４…
…検出端子、Ｒ６……抵抗、Ｃ２……コンデンサ
。
FIG. 1 is a circuit diagram showing an embodiment of a hot-wire flowmeter for an internal combustion engine according to the present invention, and FIG. 2 is a perspective view showing the structure of a potentiometer in the same embodiment.
Figure 3 shows the average flow rate detection voltage V in the same embodiment as above.
Fig. 4 is a circuit diagram showing an example of a conventional hot wire flow meter for internal combustion engines, Fig. 5 a shows the waveform of the detection voltage V1, and Fig. 5 b shows the waveform of the average flow rate detection voltage V.
It is a figure which shows the waveform of a. 1... Bridge circuit, 11... Control unit, 12... Microcomputer, 20...
...Time constant circuit, 21...Throttle valve, 21
a... Valve shaft, 22... Potentiometer, 23... Resistor, 24... Brush, Rh...
...Hot wire, T1, T2...Power terminal, T3, T4...
...Detection terminal, R6...Resistor, C2...Capacitor.
Claims (1)
に配置してなるブリツジ回路を組む共に、該ブリ
ツジ回路の一対の検出端子間の電位差が一定とな
るように該ブリツジ回路の一対の電源端子間の印
加電圧を可変制御する負帰環ループを形成し、前
記一対の検出端子の片方から前記吸入空気通路に
おける空気流量に応じた検出電圧を取り出すよう
にしてなる内燃機関用熱線式流量計において、抵
抗とコンデンサによる平滑回路によつて構成され
、前記検出電圧を平均化する時定数回路であつて
、スロツトルバルブと連動し吸入空気流量を決定
するスロツトルバルブ開度に基づいて前記抵抗値
を可変するポテンシヨンメータを有する時定数回
路を設けたことを特徴とする内燃機関用熱線式流
量計。 A bridge circuit is constructed by arranging hot wires placed on one side in the intake air passage of an internal combustion engine, and a bridge circuit is constructed by arranging hot wires placed on one side in the intake air passage of an internal combustion engine. A hot-wire flowmeter for an internal combustion engine, which forms a negative feedback loop that variably controls the applied voltage, and extracts a detection voltage corresponding to the air flow rate in the intake air passage from one of the pair of detection terminals. It is a time constant circuit that averages the detected voltage, and is composed of a smoothing circuit using a capacitor and a smoothing circuit, and is a time constant circuit that averages the detected voltage, and changes the resistance value based on the throttle valve opening degree that works in conjunction with the throttle valve and determines the intake air flow rate. 1. A hot wire flowmeter for an internal combustion engine, characterized in that a time constant circuit having a potentiometer is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6858990U JPH0427137U (en) | 1990-06-29 | 1990-06-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6858990U JPH0427137U (en) | 1990-06-29 | 1990-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0427137U true JPH0427137U (en) | 1992-03-04 |
Family
ID=31603159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6858990U Pending JPH0427137U (en) | 1990-06-29 | 1990-06-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0427137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011209192A (en) * | 2010-03-30 | 2011-10-20 | Yamatake Corp | Thermal flow rate sensor and negative pressure adsorption device |
-
1990
- 1990-06-29 JP JP6858990U patent/JPH0427137U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011209192A (en) * | 2010-03-30 | 2011-10-20 | Yamatake Corp | Thermal flow rate sensor and negative pressure adsorption device |
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