JPS6288935U - - Google Patents
Info
- Publication number
- JPS6288935U JPS6288935U JP18126385U JP18126385U JPS6288935U JP S6288935 U JPS6288935 U JP S6288935U JP 18126385 U JP18126385 U JP 18126385U JP 18126385 U JP18126385 U JP 18126385U JP S6288935 U JPS6288935 U JP S6288935U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- cylinder pressure
- engine
- dead center
- crank angle
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 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…θｐｍ
ａｘ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）、７…判
定回路（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
max and Pmax detection program, FIG. 5 is a flowchart showing the misfire detection program, FIG. 6 is a diagram showing the cylinder pressure waveform during normal combustion and abnormal combustion, and FIG. 7 is the ignition FIG. 8 is a flowchart showing the timing control program, and 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...θpm
ax detection circuit (maximum combustion value calculation means), 6...Top dead center pressure detection circuit (Top dead center pressure calculation means), 7... Judgment circuit (abnormality judgment 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
出する燃焼最大値算出手段と、 (f) 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; (f) abnormality determining means for detecting an abnormal combustion state of the engine based on the cylinder pressure at compression top dead center and the cylinder pressure when the combustion pressure is maximum; An engine combustion state detection device comprising: .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18126385U JPS6288935U (en) | 1985-11-22 | 1985-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18126385U JPS6288935U (en) | 1985-11-22 | 1985-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6288935U true JPS6288935U (en) | 1987-06-06 |
Family
ID=31125969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18126385U Pending JPS6288935U (en) | 1985-11-22 | 1985-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6288935U (en) |
-
1985
- 1985-11-22 JP JP18126385U patent/JPS6288935U/ja active Pending