JPS6286532U - - Google Patents
Info
- Publication number
- JPS6286532U JPS6286532U JP17879185U JP17879185U JPS6286532U JP S6286532 U JPS6286532 U JP S6286532U JP 17879185 U JP17879185 U JP 17879185U JP 17879185 U JP17879185 U JP 17879185U JP S6286532 U JPS6286532 U JP S6286532U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- crank angle
- combustion
- engine
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Testing Of Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Description
第１図は本考案の基本概念図、第２〜８図は本
考案の一実施例を示す図であり、第２図はそのブ
ロツク構成図、第３図はそのＰＴＤＣ検出のプロ
グラムを示すフローチヤート、第４図はそのθｐ
ｍａｘおよびＰｍａｘ検出のプログラムを示すフ
ローチヤート、第５図はその失火検出のプログラ
ムを示すフローチヤート、第６図ａ，ｂはその正
常燃焼および異常燃焼時の筒内圧波形を示す図、
第７図はその点火時期制御のプログラムを示すフ
ローチヤート、第８図はその部分燃焼時の筒内圧
波形を示す図である。
１……筒内圧センサ（圧力検出手段）、３……
サンプリング回路（サンプリング手段）、４……
クランク角センサ（クランク角検出手段）、５…
…θｐｍａｘ検出回路（燃焼最大値算出手段）、
６……上死点圧力検出回路（上死点圧力算出手段
）、１０……異常判定手段。
Fig. 1 is a basic conceptual diagram of the present invention, Figs. 2 to 8 are diagrams showing an embodiment of the present invention, Fig. 2 is a block diagram thereof, and Fig. 3 is a flowchart showing a program for detecting PTDC. Chart, Figure 4 shows the θp
A flowchart showing a program for detecting max and Pmax, FIG. 5 is a flowchart showing a program for detecting misfire, and FIGS. 6a and 6b are diagrams showing in-cylinder pressure waveforms during normal combustion and abnormal combustion.
FIG. 7 is a flowchart showing the ignition timing control program, and FIG. 8 is a diagram showing the in-cylinder pressure waveform during partial combustion. 1... Cylinder pressure sensor (pressure detection means), 3...
Sampling circuit (sampling means), 4...
Crank angle sensor (crank angle detection means), 5...
...θpmax detection circuit (maximum combustion value calculation means),
6... Top dead center pressure detection circuit (top dead center pressure calculation means), 10... Abnormality determination means.
Claims (1)
段と、 (b) エンジンのクランク角を検出するクランク
角検出手段と、 (c) 圧力検出手段の出力に基づいて所定クラン
ク角毎に筒内圧力をサンプリングするサンプリン
グ手段と、 (d) 圧縮上死点における筒内圧力を算出する上
死点圧力算出手段と、 (e) 燃焼圧力が最大となるときの筒内圧力を算
出するとともに、このときのクランク角を燃焼ピ
ーク位置として検出する燃焼最大値算出手段と、 (f) 燃焼ピーク位置がエンジンの発生トルクの
最大となる所定クランク角より前にあるとき、圧
縮上死点における筒内圧力と燃焼圧力が最大とな
るときの筒内圧力に基づいてエンジンの異常燃焼
状態を検出する異常判定手段と、 を備えたことを特徴とするエンジンの燃焼状態検
出装置。[Scope of Claim for Utility Model Registration] (a) Pressure detection means for detecting the cylinder pressure of the engine; (b) Crank angle detection means for detecting the crank angle of the engine; (c) Based on the output of the pressure detection means. sampling means for sampling the cylinder pressure at every predetermined crank angle; (d) top dead center pressure calculation means for calculating the cylinder pressure at compression top dead center; combustion maximum value calculation means for calculating the internal pressure and detecting the crank angle at this time as the combustion peak position; (f) when the combustion peak position is before a predetermined crank angle at which the engine generates the maximum torque; An engine combustion state detection device comprising: abnormality determination means for detecting an abnormal combustion state of the engine based on the in-cylinder pressure at compression top dead center and the in-cylinder pressure when combustion pressure is maximum; .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17879185U JPS6286532U (en) | 1985-11-19 | 1985-11-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17879185U JPS6286532U (en) | 1985-11-19 | 1985-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6286532U true JPS6286532U (en) | 1987-06-02 |
Family
ID=31121252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17879185U Pending JPS6286532U (en) | 1985-11-19 | 1985-11-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286532U (en) |
-
1985
- 1985-11-19 JP JP17879185U patent/JPS6286532U/ja active Pending
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