JPH01148072U - - Google Patents
Info
- Publication number
- JPH01148072U JPH01148072U JP4298088U JP4298088U JPH01148072U JP H01148072 U JPH01148072 U JP H01148072U JP 4298088 U JP4298088 U JP 4298088U JP 4298088 U JP4298088 U JP 4298088U JP H01148072 U JPH01148072 U JP H01148072U
- Authority
- JP
- Japan
- Prior art keywords
- filter circuit
- circuit
- crank angle
- engine
- filter
- 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 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク回路図、第２図は同上実施例のフイルタ切換制
御を示すフローチヤート、第３図は従来例のブロ
ツク回路図、第４図はフイルタ回路による検出時
間遅れを示す線図、第５図は従来のスタータ起動
によつて発生するノイズによる誤検出状態を示す
線図である。
１…クランク角センサ、３…コンパレータ、１
１…第１のフイルタ回路、１２…第２のフイルタ
回路、１３…切換スイツチ、１４…フイルタ切換
回路。
FIG. 1 is a block circuit diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a flowchart showing filter switching control of the same embodiment, FIG. 3 is a block circuit diagram of a conventional example, and FIG. FIG. 5 is a diagram showing the detection time delay caused by the circuit, and FIG. 5 is a diagram showing the erroneous detection state due to noise generated by starting the starter in the related art. 1...Crank angle sensor, 3...Comparator, 1
DESCRIPTION OF SYMBOLS 1...First filter circuit, 12...Second filter circuit, 13...Switchover switch, 14...Filter switching circuit.
Claims (1)
て検出された内燃機関のクランク角信号を、フイ
ルタ回路及びコンパレータを介して方形波として
出力するクランク角信号の信号処理回路において
、前記フイルタ回路として時定数が大きい第１の
フイルタ回路と、時定数が小さい第２のフイルタ
回路とを備える一方、機関のクランキング時及び
所定以下の低回転時には、前記第１のフイルタ回
路を、それを上回る高回転時には、前記第２のフ
イルタ回路を選択して作動させるフイルタ切換回
路を設けたことを特徴とするクランク角信号の信
号処理回路。 In a signal processing circuit for a crank angle signal that outputs a crank angle signal of an internal combustion engine detected by an electromagnetic pickup type crank angle sensor as a square wave via a filter circuit and a comparator, the filter circuit has a large time constant. A first filter circuit and a second filter circuit having a small time constant are provided, and when the engine is cranking or when the engine is running at a low speed below a predetermined level, the first filter circuit is connected to the first filter circuit, and when the engine is running at a high speed that exceeds the specified level, the first filter circuit is connected to the first filter circuit. A signal processing circuit for a crank angle signal, comprising a filter switching circuit that selectively operates a second filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4298088U JPH01148072U (en) | 1988-04-01 | 1988-04-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4298088U JPH01148072U (en) | 1988-04-01 | 1988-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01148072U true JPH01148072U (en) | 1989-10-13 |
Family
ID=31269382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4298088U Pending JPH01148072U (en) | 1988-04-01 | 1988-04-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01148072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155443A (en) * | 2005-12-02 | 2007-06-21 | Denso Corp | Sensor signal processor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116835A (en) * | 1974-02-20 | 1975-09-12 | ||
| JPS5486362A (en) * | 1977-12-21 | 1979-07-09 | Matsushita Electric Ind Co Ltd | Rotating angle detector |
| JPS58144665A (en) * | 1982-02-22 | 1983-08-29 | Nippon Denso Co Ltd | Igniting apparatus for internal-combustion engine |
| JPS5950870A (en) * | 1982-09-14 | 1984-03-24 | Mazda Motor Corp | Composite shell of automobile |
| JPS6114313B2 (en) * | 1981-07-21 | 1986-04-18 | Soshin Mokuzai Kk |
-
1988
- 1988-04-01 JP JP4298088U patent/JPH01148072U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116835A (en) * | 1974-02-20 | 1975-09-12 | ||
| JPS5486362A (en) * | 1977-12-21 | 1979-07-09 | Matsushita Electric Ind Co Ltd | Rotating angle detector |
| JPS6114313B2 (en) * | 1981-07-21 | 1986-04-18 | Soshin Mokuzai Kk | |
| JPS58144665A (en) * | 1982-02-22 | 1983-08-29 | Nippon Denso Co Ltd | Igniting apparatus for internal-combustion engine |
| JPS5950870A (en) * | 1982-09-14 | 1984-03-24 | Mazda Motor Corp | Composite shell of automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155443A (en) * | 2005-12-02 | 2007-06-21 | Denso Corp | Sensor signal processor |
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