JPH0171646U - - Google Patents
Info
- Publication number
- JPH0171646U JPH0171646U JP1987166795U JP16679587U JPH0171646U JP H0171646 U JPH0171646 U JP H0171646U JP 1987166795 U JP1987166795 U JP 1987166795U JP 16679587 U JP16679587 U JP 16679587U JP H0171646 U JPH0171646 U JP H0171646U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder pressure
- crank angle
- angle position
- detecting
- predetermined
- 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 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Arrangements Characterized By The Use Of Fluids (AREA)
- Testing Of Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
第１図は本考案の構成を説明するためのブロツ
ク図、第２図は本考案の一実施例のハードウエア
構成図、第３図は同上実施例の制御フローチヤー
ト、第４図は同上実施例の失火判定動作の説明図
、第５図は本考案の別の実施例における失火判定
動作の説明図、第６図〜第９図は従来のθｐｍａ
ｘ検出動作を説明するための筒内圧力波形例を示
す図で、第６図は関数近似が可能な場合、第７図
は進角状態の場合、第８図は遅角状態の場合、第
９図は失火状態の場合である。
１……筒内圧センサ、２……Ａ／Ｄ変換器、３
……クランク角センサ、４……信号処理回路、５
……マイクロコンピユータ、６……点火時期制御
装置。
Fig. 1 is a block diagram for explaining the configuration of the present invention, Fig. 2 is a hardware configuration diagram of an embodiment of the invention, Fig. 3 is a control flowchart of the same embodiment, and Fig. 4 is an implementation of the same. FIG. 5 is an explanatory diagram of the misfire determination operation in another embodiment of the present invention, and FIGS. 6 to 9 are the conventional θpma
These are diagrams showing examples of in-cylinder pressure waveforms for explaining the x detection operation. Fig. 6 shows the waveform when function approximation is possible, Fig. 7 shows the waveform when the angle is advanced, and Fig. 8 shows the waveform when the angle is retarded. Figure 9 shows the case of misfire. 1...Cylinder pressure sensor, 2...A/D converter, 3
... Crank angle sensor, 4 ... Signal processing circuit, 5
...Microcomputer, 6...Ignition timing control device.
Claims (1)
ンク角位置を検出する手段と、そのクランク角位
置で筒内圧力が最大となるよう予め設定した目標
クランク角位置近傍における複数の所定クランク
角位置及び上死点近傍の所定クランク角位置にお
ける筒内圧検出値に基づいて、筒内圧力変化の関
数近似又は各筒内圧検出値の大小の比較を行ない
筒内圧最大クランク角位置を判別する手段と、該
判別手段により筒内圧最大クランク角位置が進角
と判定されたときに前記上死点近傍の所定クラン
ク角位置の筒内圧検出値が所定値以下のとき失火
と判定する失火判定手段とを備えたことを特徴と
する筒内圧最大クランク角位置検出装置。 A means for detecting the cylinder pressure of the engine, a means for detecting the crank angle position of the engine, and a plurality of predetermined crank angle positions in the vicinity of a target crank angle position preset so that the cylinder pressure is maximized at the crank angle position. and means for determining the maximum cylinder pressure crank angle position by approximating a cylinder pressure change or comparing the magnitude of each cylinder pressure detection value based on the cylinder pressure detection value at a predetermined crank angle position near top dead center; misfire determination means for determining a misfire when the cylinder pressure detection value at a predetermined crank angle position near the top dead center is less than or equal to a predetermined value when the cylinder pressure maximum crank angle position is determined to be advanced by the determination means; A device for detecting the maximum crank angle position of cylinder pressure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16679587U JPH0610278Y2 (en) | 1987-11-02 | 1987-11-02 | Cylinder pressure maximum crank angle position detector |
| US07/265,819 US4892075A (en) | 1987-11-02 | 1988-11-01 | Crank angle detecting system for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16679587U JPH0610278Y2 (en) | 1987-11-02 | 1987-11-02 | Cylinder pressure maximum crank angle position detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0171646U true JPH0171646U (en) | 1989-05-12 |
| JPH0610278Y2 JPH0610278Y2 (en) | 1994-03-16 |
Family
ID=31454497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16679587U Expired - Lifetime JPH0610278Y2 (en) | 1987-11-02 | 1987-11-02 | Cylinder pressure maximum crank angle position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610278Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016002165A1 (en) * | 2014-07-02 | 2016-01-07 | マツダ株式会社 | Control device for laser ignition engine |
| JP2016014347A (en) * | 2014-07-02 | 2016-01-28 | マツダ株式会社 | Laser ignition engine control unit |
-
1987
- 1987-11-02 JP JP16679587U patent/JPH0610278Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016002165A1 (en) * | 2014-07-02 | 2016-01-07 | マツダ株式会社 | Control device for laser ignition engine |
| JP2016014347A (en) * | 2014-07-02 | 2016-01-28 | マツダ株式会社 | Laser ignition engine control unit |
| US10041464B2 (en) | 2014-07-02 | 2018-08-07 | Mazda Motor Corporation | Controller of laser ignition engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0610278Y2 (en) | 1994-03-16 |
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