JPH0171645U - - Google Patents
Info
- Publication number
- JPH0171645U JPH0171645U JP1987166794U JP16679487U JPH0171645U JP H0171645 U JPH0171645 U JP H0171645U JP 1987166794 U JP1987166794 U JP 1987166794U JP 16679487 U JP16679487 U JP 16679487U JP H0171645 U JPH0171645 U JP H0171645U
- Authority
- JP
- Japan
- Prior art keywords
- crank angle
- cylinder pressure
- angle position
- 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.)
- Granted
Links
Landscapes
- Measuring Fluid Pressure (AREA)
- 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図及び第５図はそれぞれ過度の遅角状態
における筒内圧力波形例を示す図、第６図〜第９
図は従来のθｐｍａｘ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〜第９図は関数近似が不可能
な場合で第７図は進角状態の場合、第８図は遅角
状態の場合、第９図は過度の遅角状態の場合であ
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 present invention, FIG. 3 is a control flowchart of the same embodiment, and FIGS. The figures are diagrams showing examples of cylinder pressure waveforms in an excessively retarded state, respectively, and Figures 6 to 9.
The figures are diagrams showing examples of cylinder pressure waveforms to explain the conventional θpmax detection operation. Figure 6 shows the case where function approximation is possible, and Figures 7 to 9 show the cases where function approximation is impossible. 7 shows the case in the advanced angle state, FIG. 8 shows the case in the retarded state, and FIG. 9 shows the case in the excessively retarded state. 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、このクランク角位
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
角位置及びこれら所定クランク角位置より後方の
離れた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い筒内圧最大クランク
角位置を半別する手段とを備えて構成したことを
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 this crank angle position. Based on the detected cylinder pressure values at predetermined crank angle positions distant from the predetermined crank angle position, the cylinder pressure maximum crank angle position is determined by approximating the cylinder pressure change as a function or comparing the magnitude of each cylinder pressure detection value. What is claimed is: 1. A maximum crank angle position detection device for in-cylinder pressure, characterized in that it is configured to include a means for dividing the crank angle into two halves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987166794U JPH0633396Y2 (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 |
|---|---|---|---|
| JP1987166794U JPH0633396Y2 (en) | 1987-11-02 | 1987-11-02 | Cylinder pressure maximum crank angle position detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0171645U true JPH0171645U (en) | 1989-05-12 |
| JPH0633396Y2 JPH0633396Y2 (en) | 1994-08-31 |
Family
ID=31454495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987166794U Expired - Lifetime JPH0633396Y2 (en) | 1987-11-02 | 1987-11-02 | Cylinder pressure maximum crank angle position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633396Y2 (en) |
-
1987
- 1987-11-02 JP JP1987166794U patent/JPH0633396Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0633396Y2 (en) | 1994-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0171645U (en) | ||
| JPH01144469U (en) | ||
| JPH0171646U (en) | ||
| JPS6415934U (en) | ||
| JPS6415937U (en) | ||
| JPS6375567U (en) | ||
| JPH01139084U (en) | ||
| JPH0226769U (en) | ||
| JPS6170575U (en) | ||
| JPS62124260U (en) | ||
| JPH0158144U (en) | ||
| JPS62184174U (en) | ||
| JPS61140965U (en) | ||
| JPS6411373U (en) | ||
| JPH0163777U (en) | ||
| JPS60133145U (en) | Direct cylinder injection internal combustion engine | |
| JPS6449667U (en) | ||
| JPH02147868U (en) | ||
| JPS6288935U (en) | ||
| JPS62124277U (en) | ||
| JPS6224037U (en) | ||
| JPS59154833U (en) | Internal combustion engine stroke discrimination device | |
| JPS6286532U (en) | ||
| JPH0363774U (en) | ||
| JPH0454977U (en) |