JPS61125718U - - Google Patents
Info
- Publication number
- JPS61125718U JPS61125718U JP793085U JP793085U JPS61125718U JP S61125718 U JPS61125718 U JP S61125718U JP 793085 U JP793085 U JP 793085U JP 793085 U JP793085 U JP 793085U JP S61125718 U JPS61125718 U JP S61125718U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- intake air
- sensing element
- temperature sensing
- calculation means
- 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
Links
- 238000001816 cooling Methods 0.000 claims 2
- 230000010349 pulsation Effects 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案のクレーム対応図、第２図は本
考案の一実施例を示す概略構成図、第３図は第２
図の要部拡大図、第４図は同上の出力電圧変化を
示す図、第５図は同上のフローチヤート、第６図
は他のフローチヤート、第７図は吸気流量計の従
来例を示す概略図、第８図は同上の出力電圧変化
を示す図である。
１…熱線抵抗、２…出力抵抗、１１…吸気通路
、１２…ロツド部材、１３…制御装置。
Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a schematic configuration diagram showing an embodiment of the present invention, and Fig. 3 is a diagram of the second embodiment of the present invention.
An enlarged view of the main part of the figure, Figure 4 is a diagram showing the output voltage change in the same as above, Figure 5 is a flowchart in the same as above, Figure 6 is another flowchart, and Figure 7 is a conventional example of an intake flow meter. The schematic diagram, FIG. 8, is a diagram showing changes in the output voltage of the same as above. DESCRIPTION OF SYMBOLS 1... Hot wire resistance, 2... Output resistance, 11... Intake passage, 12... Rod member, 13... Control device.
Claims (1)
気による冷却度に基づいて吸入空気流量を検出す
る内燃機関の吸気流量計において、前記感温素子
下流でかつその近傍の吸気通路に設けられ機関の
吹返し流によりカルマン渦を発生させるカルマン
渦発生装置と、前記感温素子の冷却度に基づいて
出力される出力信号から吸入空気流量を演算する
第１の演算手段と、前記出力信号の脈動周波数を
検出する周波数検出手段と、前記吹返し流による
所定値以上の前記脈動周波数に対応する出力信号
のときの流量を演算する第２の演算手段と、第１
と第２の演算手段により演算された吸入空気流量
に基づいて真の吸入空気流量を演算する第３の演
算手段と、を備えたことを特徴とする内燃機関の
吸気流量計。 In an intake flow meter for an internal combustion engine that detects the intake air flow rate based on the degree of cooling by the intake air of a temperature sensing element installed in the intake passage of the engine, the temperature sensing element is installed in the intake passage downstream of and in the vicinity of the temperature sensing element. a Karman vortex generating device that generates a Karman vortex by the blowback flow of the engine; a first calculation means that calculates an intake air flow rate from an output signal output based on the degree of cooling of the temperature sensing element; a frequency detection means for detecting a pulsation frequency; a second calculation means for calculating a flow rate when an output signal corresponding to the pulsation frequency equal to or higher than a predetermined value due to the blowback flow;
and third calculation means for calculating a true intake air flow rate based on the intake air flow rate calculated by the second calculation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP793085U JPH0351710Y2 (en) | 1985-01-25 | 1985-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP793085U JPH0351710Y2 (en) | 1985-01-25 | 1985-01-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61125718U true JPS61125718U (en) | 1986-08-07 |
| JPH0351710Y2 JPH0351710Y2 (en) | 1991-11-07 |
Family
ID=30486739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP793085U Expired JPH0351710Y2 (en) | 1985-01-25 | 1985-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351710Y2 (en) |
-
1985
- 1985-01-25 JP JP793085U patent/JPH0351710Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351710Y2 (en) | 1991-11-07 |
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