JPH0233324U - - Google Patents
Info
- Publication number
- JPH0233324U JPH0233324U JP11117688U JP11117688U JPH0233324U JP H0233324 U JPH0233324 U JP H0233324U JP 11117688 U JP11117688 U JP 11117688U JP 11117688 U JP11117688 U JP 11117688U JP H0233324 U JPH0233324 U JP H0233324U
- Authority
- JP
- Japan
- Prior art keywords
- hot wire
- wire probe
- current supply
- intake stroke
- engine
- 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
- 239000000523 sample Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Description
第１図は本案の実施例の説明図、第２図、第３
図は従来例の説明図、第４図は空気流量がステツ
プ的に変化した時の空気流量計信号の説明図、第
５図は加熱電流供給時間Ｔとエンジン回転数から
、空気量を求めるテーブルの説明図、第６図は本
案の１吸気行程で２回以上計測する方法の説明図
、第７図は吸気行程中の空気量を求めるためのフ
ローチヤート、第８図は第１図の変形例説明図で
ある。
１……熱線プローブ、２……温度プローブ、３
……コンパレータ、４……フリツプフロツプ、８
……トランジスタ、１５……クランク角センサ、
１６……ゼロスパン調整回路、１７……コンピユ
ータ。
Figure 1 is an explanatory diagram of the embodiment of this proposal, Figures 2 and 3
The figure is an explanatory diagram of the conventional example, Figure 4 is an explanatory diagram of the air flow meter signal when the air flow rate changes stepwise, and Figure 5 is a table for calculating the air amount from the heating current supply time T and the engine rotation speed. , Figure 6 is an explanatory diagram of the proposed method of measuring more than once in one intake stroke, Figure 7 is a flowchart for determining the amount of air during the intake stroke, and Figure 8 is a modification of Figure 1. It is an example explanatory diagram. 1...Hot wire probe, 2...Temperature probe, 3
... Comparator, 4 ... Flip-flop, 8
...Transistor, 15...Crank angle sensor,
16... Zero span adjustment circuit, 17... Computer.
Claims (1)
ブ、エンジンの吸気行程１回につき、２回以上、
特定クランク角の時に、該熱線プローブに加熱電
流を供給する電流供給手段、上記加熱電流によつ
て熱線プローブが所定の温度まで上昇したことを
検出する手段、上記検出手段からの信号にもとづ
いて、熱線プローブへの電流供給を遮断する手段
、上記熱線プローブへの電流供給時間に対応した
出力信号を発生する手段、該出力信号より、吸気
行程１回当りの空気量を算出する手段を備えたこ
とを特徴とする空気流量計。 A hot wire probe installed in the intake pipe of the engine, twice or more per intake stroke of the engine,
Current supply means for supplying a heating current to the hot wire probe at a specific crank angle; means for detecting that the hot wire probe has risen to a predetermined temperature due to the heating current; based on the signal from the detection means, A means for cutting off the current supply to the hot wire probe, a means for generating an output signal corresponding to the current supply time to the hot wire probe, and a means for calculating the amount of air per intake stroke from the output signal. An air flow meter featuring:
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11117688U JPH0233324U (en) | 1988-08-26 | 1988-08-26 | |
| US07/365,552 US4966033A (en) | 1988-06-15 | 1989-06-13 | Air flow metering apparatus for internal combustion engines |
| EP89306063A EP0347218B1 (en) | 1988-06-15 | 1989-06-15 | Air flow metering apparatus for internal combustion engines |
| DE68927076T DE68927076T2 (en) | 1988-06-15 | 1989-06-15 | Air flow metering device for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11117688U JPH0233324U (en) | 1988-08-26 | 1988-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0233324U true JPH0233324U (en) | 1990-03-02 |
Family
ID=31348996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11117688U Pending JPH0233324U (en) | 1988-06-15 | 1988-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233324U (en) |
-
1988
- 1988-08-26 JP JP11117688U patent/JPH0233324U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60247030A (en) | Engine control device | |
| KR840004476A (en) | Fuel injection controller | |
| JPH0233324U (en) | ||
| JPS62155318U (en) | ||
| JPS6212730U (en) | ||
| JPH0342041U (en) | ||
| JPS6398460U (en) | ||
| JPH02144741U (en) | ||
| JPS62132247U (en) | ||
| JPH0188003U (en) | ||
| JPS6398461U (en) | ||
| JPS6425722U (en) | ||
| JPS6398462U (en) | ||
| JPH0272343U (en) | ||
| JPS63200647U (en) | ||
| JPS61151050U (en) | ||
| JPH01119856U (en) | ||
| JPS6348942U (en) | ||
| JPH03114043U (en) | ||
| JPS6439450U (en) | ||
| JPH01120623U (en) | ||
| JPS61125718U (en) | ||
| JPS6284643U (en) | ||
| JPH027375U (en) | ||
| JPS61167445U (en) |