JPH0167525U - - Google Patents
Info
- Publication number
- JPH0167525U JPH0167525U JP1987162211U JP16221187U JPH0167525U JP H0167525 U JPH0167525 U JP H0167525U JP 1987162211 U JP1987162211 U JP 1987162211U JP 16221187 U JP16221187 U JP 16221187U JP H0167525 U JPH0167525 U JP H0167525U
- Authority
- JP
- Japan
- Prior art keywords
- crank angle
- engine
- phase shift
- output
- operating state
- 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
- 230000010363 phase shift Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000006866 deterioration Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案の基本概念図、第２〜７図は本
考案の一実施例を示す図であり、第２図はその全
体構成図、第３図はそのコントロールユニツトの
回路構成図、第４図はそのホツトワイヤセンサの
電流制御回路図、第５図はその絞弁全開時のホツ
トワイヤセンサの出力の挙動を示す特性図、第６
図はそのエンジン回転数とＯＦＦＳＥＴ量との関
係を示す特性図、第７図はそのホツトワイヤの劣
化に応じて位相ずれを調整するプログラムを示す
フローチヤートである。
１……エンジン、１３……ホツトワイヤセンサ
（熱線式質量流量計）、１６……クランク角セン
サ（クランク角検出手段）、１８……運転状態検
出手段、１９……コントロールユニツト（位相ず
れ演算手段、劣化判定手段）、２６……位相ずれ
調整装置。
Fig. 1 is a basic conceptual diagram of the present invention, Figs. 2 to 7 are diagrams showing an embodiment of the present invention, Fig. 2 is a diagram of its overall configuration, and Fig. 3 is a circuit diagram of its control unit. Fig. 4 is a current control circuit diagram of the hot wire sensor, Fig. 5 is a characteristic diagram showing the behavior of the output of the hot wire sensor when the throttle valve is fully open, and Fig. 6 is a characteristic diagram showing the behavior of the output of the hot wire sensor when the throttle valve is fully open.
The figure is a characteristic diagram showing the relationship between the engine speed and the OFFSET amount, and FIG. 7 is a flowchart showing a program for adjusting the phase shift according to the deterioration of the hot wire. DESCRIPTION OF SYMBOLS 1...Engine, 13...Hot wire sensor (hot wire mass flow meter), 16...Crank angle sensor (crank angle detection means), 18...Operating state detection means, 19...Control unit (phase shift calculation means) , deterioration determination means), 26... phase shift adjustment device.
Claims (1)
出手段と、 (b) 基準クランク角に対応する基準信号および
単位クランク角に対応する単位信号を出力するク
ランク角検出手段と、 (c) エンジンの吸入空気量を検出する熱線式質
量流量計と、 (d) エンジンが所定の運転状態にあるとき、前
記基準信号出力時から吸入空気量が所定量となる
クランク角までの前記熱線式質量流量計の出力値
の位相ずれを演算する位相ずれ演算手段と、 (e) 該位相ずれ演算手段の出力に基づいて熱線
式質量流量計の劣化状態を判定する劣化判定手段
と、 (f) 該劣化判定手段の出力に応じて前記位相ず
れを調整する位相ずれ調整手段と、 を備えたことを特徴とする内燃機関の熱線式質量
流量検出装置。[Claims for Utility Model Registration] (a) Operating state detection means for detecting the operating state of the engine; (b) Crank angle detection that outputs a reference signal corresponding to a reference crank angle and a unit signal corresponding to a unit crank angle. (c) a hot-wire mass flowmeter for detecting the intake air amount of the engine; and (d) a crank angle at which the intake air amount becomes a predetermined amount from the time when the reference signal is output when the engine is in a predetermined operating state. (e) a deterioration determination means for determining a state of deterioration of the hot wire mass flowmeter based on the output of the phase shift calculation means; A hot-wire mass flow rate detection device for an internal combustion engine, comprising: (f) phase shift adjusting means for adjusting the phase shift according to the output of the deterioration determining means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162211U JPH0167525U (en) | 1987-10-23 | 1987-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162211U JPH0167525U (en) | 1987-10-23 | 1987-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0167525U true JPH0167525U (en) | 1989-05-01 |
Family
ID=31445833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987162211U Pending JPH0167525U (en) | 1987-10-23 | 1987-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0167525U (en) |
-
1987
- 1987-10-23 JP JP1987162211U patent/JPH0167525U/ja active Pending
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