JPS6415937U - - Google Patents
Info
- Publication number
- JPS6415937U JPS6415937U JP10819787U JP10819787U JPS6415937U JP S6415937 U JPS6415937 U JP S6415937U JP 10819787 U JP10819787 U JP 10819787U JP 10819787 U JP10819787 U JP 10819787U JP S6415937 U JPS6415937 U JP S6415937U
- Authority
- JP
- Japan
- Prior art keywords
- engine
- pressure
- detection means
- crank angle
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Measuring Fluid Pressure (AREA)
- Testing Of Engines (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Ｐｓ
およびθｐｍａｘ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
の作用を説明するための正常燃焼、異常燃焼時お
よびセンサ故障時の筒内圧波形を示す図、第８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…
…筒内圧変化検出回路（積算値算出手段）、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 is the Ps
FIG. 5 is a flowchart showing the misfire detection program, FIG. 6 is a diagram showing the in-cylinder pressure waveform during normal combustion and abnormal combustion, and FIG. 7 is a diagram showing its operation. For purposes of explanation, FIG. 8 is a flowchart showing the ignition timing control program. 1... Cylinder pressure sensor (pressure detection means), 3...
Sampling circuit (sampling means), 4...
Crank angle sensor (crank angle detection means), 5...
...Cylinder pressure change detection circuit (integrated value 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) サンプリング手段の出力に基づいて所定区
間における筒内圧力の積算値を算出する積算値算
出手段と、 (e) 前記積算値を所定の基準値と比較してエン
ジンの異常燃焼状態あるいは圧力検出手段の異常
の少なくとも一つ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。[Claims 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) integrated value calculation means for calculating the integrated value of the cylinder pressure in a predetermined section based on the output of the sampling means; and (e) the integrated value. An engine combustion state detection device comprising: an abnormality determination means for detecting at least one of an abnormal combustion state of the engine or an abnormality of the pressure detection means by comparing the pressure with a predetermined reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10819787U JPH0542363Y2 (en) | 1987-07-13 | 1987-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10819787U JPH0542363Y2 (en) | 1987-07-13 | 1987-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6415937U true JPS6415937U (en) | 1989-01-26 |
| JPH0542363Y2 JPH0542363Y2 (en) | 1993-10-26 |
Family
ID=31343299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10819787U Expired - Lifetime JPH0542363Y2 (en) | 1987-07-13 | 1987-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0542363Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5604303A (en) * | 1993-10-19 | 1997-02-18 | Unisia Jecs Corporation | Combustion condition detecting system of internal combustion engine |
| US7257482B2 (en) | 2004-11-29 | 2007-08-14 | Honda Motor Co., Ltd. | Misfire detection apparatus |
| US9279406B2 (en) | 2012-06-22 | 2016-03-08 | Illinois Tool Works, Inc. | System and method for analyzing carbon build up in an engine |
-
1987
- 1987-07-13 JP JP10819787U patent/JPH0542363Y2/ja not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5604303A (en) * | 1993-10-19 | 1997-02-18 | Unisia Jecs Corporation | Combustion condition detecting system of internal combustion engine |
| US7257482B2 (en) | 2004-11-29 | 2007-08-14 | Honda Motor Co., Ltd. | Misfire detection apparatus |
| US9279406B2 (en) | 2012-06-22 | 2016-03-08 | Illinois Tool Works, Inc. | System and method for analyzing carbon build up in an engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542363Y2 (en) | 1993-10-26 |