JPH0226769U - - Google Patents
Info
- Publication number
- JPH0226769U JPH0226769U JP10498588U JP10498588U JPH0226769U JP H0226769 U JPH0226769 U JP H0226769U JP 10498588 U JP10498588 U JP 10498588U JP 10498588 U JP10498588 U JP 10498588U JP H0226769 U JPH0226769 U JP H0226769U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder pressure
- crank angle
- ignition timing
- sensor
- detecting
- 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
Landscapes
- Electrical Control Of Ignition Timing (AREA)
Description
第１図はこの考案のクレーム対応図、第２図は
この考案を点火時期のＭＢＴ制御に適用した場合
の一実施例のブロツク図、第３図ないし第５図と
第８図は第２図の実施例と同様な装置をマイクロ
コンピユータで実現する場合の制御動作を説明す
るための流れ図、第６図と第７図はそれぞれ遅角
しすぎて失火した場合と、進角のしすぎによりΘ
ｐｍａｘが圧縮上死点近傍にきた場合の筒内圧波
形図、第９図は従来例のブロツク図である。
１……筒内圧センサ、２……チヤージアンプ、
３……サンプリング回路、４……クランク角セン
サ、５……筒内圧最大クランク角検出回路、１１
……点火時期設定手段、１２……点火手段、１３
……クランク角センサ、１４……筒内圧センサ、
１５……サンプリング手段、１６……筒内圧最大
クランク角検出手段、１７……判定手段、２１…
…コントロールユニツト、２２……点火時期設定
回路、２３……点火時期記憶回路、２４……点火
装置、２５……判定回路、２６……補正量演算回
路。
Fig. 1 is a complaint response diagram of this invention, Fig. 2 is a block diagram of an embodiment in which this invention is applied to MBT control of ignition timing, and Figs. 3 to 5 and 8 are Fig. 2. Flowcharts to explain the control operation when implementing a device similar to the embodiment with a microcomputer, Figs. 6 and 7 show cases in which a misfire occurs due to too much retardation, and Θ due to too much advance.
FIG. 9 is a block diagram of a conventional example, which is a cylinder pressure waveform diagram when pmax approaches the compression top dead center. 1...Cylinder pressure sensor, 2...Charge amplifier,
3... Sampling circuit, 4... Crank angle sensor, 5... Cylinder pressure maximum crank angle detection circuit, 11
...Ignition timing setting means, 12...Ignition means, 13
... Crank angle sensor, 14 ... Cylinder pressure sensor,
15... Sampling means, 16... Cylinder pressure maximum crank angle detection means, 17... Judgment means, 21...
...Control unit, 22...Ignition timing setting circuit, 23...Ignition timing storage circuit, 24...Ignition device, 25...Determination circuit, 26...Correction amount calculation circuit.
Claims (1)
期に合わせて点火を行う手段と、エンジンのクラ
ンク角を検出するセンサと、エンジンの筒内圧を
検出するセンサと、この筒内圧センサの検出値を
所定のクランク角毎にサンプリングする手段と、
サンプリング手段にて得られるデータより筒内圧
が最大となるクランク角位置を検出する手段と、
この筒内圧最大クランク角位置が圧縮上死点近傍
にある場合に筒内圧最大クランク角位置と前記点
火時期設定手段にて設定された点火時期とを比較
することにより、点火時期の進角のしすぎか、そ
れとも遅角のしすぎで失火を生じているのかを判
定する手段とを設けたことを特徴とする筒内圧信
号の異常判定装置。 A means for setting the ignition timing, a means for igniting in accordance with the set ignition timing, a sensor for detecting the crank angle of the engine, a sensor for detecting the cylinder pressure of the engine, and a detection value of the cylinder pressure sensor. means for sampling at every predetermined crank angle;
means for detecting a crank angle position at which the cylinder pressure is maximum from data obtained by the sampling means;
When the cylinder pressure maximum crank angle position is near the compression top dead center, the ignition timing is advanced by comparing the cylinder pressure maximum crank angle position with the ignition timing set by the ignition timing setting means. 1. An abnormality determination device for a cylinder pressure signal, comprising means for determining whether a misfire is caused by over-retardation, or by over-retardation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10498588U JPH0710061Y2 (en) | 1988-08-09 | 1988-08-09 | Cylinder pressure signal abnormality determination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10498588U JPH0710061Y2 (en) | 1988-08-09 | 1988-08-09 | Cylinder pressure signal abnormality determination device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0226769U true JPH0226769U (en) | 1990-02-21 |
| JPH0710061Y2 JPH0710061Y2 (en) | 1995-03-08 |
Family
ID=31337194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10498588U Expired - Lifetime JPH0710061Y2 (en) | 1988-08-09 | 1988-08-09 | Cylinder pressure signal abnormality determination device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710061Y2 (en) |
-
1988
- 1988-08-09 JP JP10498588U patent/JPH0710061Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0710061Y2 (en) | 1995-03-08 |
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