JPS5886407A - Detector for crank angle of internal combustion engine - Google Patents
Detector for crank angle of internal combustion engineInfo
- Publication number
- JPS5886407A JPS5886407A JP18437981A JP18437981A JPS5886407A JP S5886407 A JPS5886407 A JP S5886407A JP 18437981 A JP18437981 A JP 18437981A JP 18437981 A JP18437981 A JP 18437981A JP S5886407 A JPS5886407 A JP S5886407A
- Authority
- JP
- Japan
- Prior art keywords
- light
- circuit
- light emitting
- optical fiber
- slit disk
- 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 title claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
- G01D5/34723—Scale reading or illumination devices involving light-guides
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、内燃機関の電子制御システムに使用される光
利用のクランク角検出装置ＫＪＩＩする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical crank angle detection device KJII used in an electronic control system for an internal combustion engine.
電子制御式内燃機関の回転速度信号を取り出し、あるい
は、点火時期又は燃料噴射時期勢の制御信号を得るべく
使用される光利用のクランク角検出装置としては、クラ
ンク軸又はディストリビュータのシャ７）Ｋスリット円
板を取り付け、このスリット円板を挾んで発光素子と受
光素子とを対向配設したものがある。（％開昭４７−１
１８５１号）即ち、第１図は光利用のクランク角検出装
置をディストリビュータに内蔵したものであって、図中
、１はディストリビュータＤのカバー、２はロータ、３
はダストカバーを兼ねるシールドカバーであり、図示し
ない点火コイルの２次電圧を一一タ２で各気筒へ分配す
るようになっている。又、１１ｉ１１ｅロータ２を回転
させるシャフト４には所定の間隔でスリットを形成した
スリット円板５を固定し、この円板５を挾むようにして
配設した発光素子と受光素子とを備えたフォトカプラ６
と、受光素子の出力波形を方形波に整形する波形整形回
路及び出力回路を備えた処理回路Ｔをケース８に固定し
ていた。９はカップリング、１０は信号バーに１°信号
用スリットａ、その内側Ｋ１２０°信号用スリツ）ｂが
開設されたスリット円板５の前記スリン）ａ、ｂを挾ん
で発光ダイオード等の発光素子６ａと受光ダイオード勢
の受光素子６ｂとを対向させており、スリット円板５の
スリン）ａ、ｂを透過して受光素子６ｂに光が入射され
るたびごとに信号を発生する。An optical crank angle detection device used to extract a rotational speed signal of an electronically controlled internal combustion engine or to obtain a control signal for ignition timing or fuel injection timing is a crankshaft or distributor shaft 7) K slit. There is one in which a circular plate is attached and a light emitting element and a light receiving element are disposed facing each other with the slit circular plate in between. (% Kaisho 47-1
1851) That is, Fig. 1 shows a crank angle detection device using light built into a distributor, and in the figure, 1 is a cover of distributor D, 2 is a rotor, and 3 is a
1 is a shield cover which also serves as a dust cover, and is configured to distribute the secondary voltage of an ignition coil (not shown) to each cylinder by a regulator 2. Further, a slit disk 5 in which slits are formed at predetermined intervals is fixed to the shaft 4 that rotates the 11i11e rotor 2, and a photocoupler 6 comprising a light emitting element and a light receiving element is arranged to sandwich the disk 5.
A processing circuit T including a waveform shaping circuit and an output circuit for shaping the output waveform of the light receiving element into a square wave was fixed to the case 8. 9 is a coupling, 10 is a signal bar with a 1° signal slit a, and a 120° signal slit a on the inside thereof. 6a and a light-receiving element 6b such as a light-receiving diode are opposed to each other, and a signal is generated each time light passes through the slits a and b of the slit disk 5 and is incident on the light-receiving element 6b.
即ち、第３図に示すようにクランク軸１１の回転速度の
局の速度でシャフト４を介しスリット円板５が回転する
と、該円板５のスリン）ａ、ｂが画素子＠＊、＠ｂ間を
通過するたびごとに受光素子６ｂから信号が出力される
。そして、この信号が波形整形回路及び増巾（出力）回
路を備えた処理回路７で処理された後に、信号ハーネス
１ｏを介して制御装置１２に供給され各樵の制御信号が
算出される。１３は入出力回路、１４は演算回路である
。That is, as shown in FIG. 3, when the slit disk 5 rotates through the shaft 4 at a speed equal to the rotational speed of the crankshaft 11, the slit disks 5) a and b become pixel elements @*, @b. A signal is output from the light-receiving element 6b each time the light-receiving element 6b passes through the gap. After this signal is processed by a processing circuit 7 including a waveform shaping circuit and an amplification (output) circuit, it is supplied to a control device 12 via a signal harness 1o, and a control signal for each woodcutter is calculated. 13 is an input/output circuit, and 14 is an arithmetic circuit.
ところが、このように受光率子をディストリビュータ内
に装着した場合は、点火系の高圧パルスの影響によるノ
イズを避けるために波形整形回路等の処理回路をディス
トリビュータに内蔵すると共に、シールドカバーを装着
してノイズを低減させる必要性がある。しかしこれでも
エンジンルーム内の高温雰囲気で回路が高温になるおそ
れがあルノで信頼性が低下すると同時に、ノイズ防止回
路勢をも付設する必要が生じて回路構成が複雑になると
いう問題点があった。However, when the light-receiving factor is installed inside the distributor in this way, a processing circuit such as a waveform shaping circuit is built into the distributor to avoid noise caused by the effects of high-voltage pulses in the ignition system, and a shield cover is also installed. There is a need to reduce noise. However, even with this, there is a risk that the circuit will become hot in the high-temperature atmosphere in the engine compartment, which reduces reliability, and at the same time, there is a problem that a noise prevention circuit must be added, making the circuit configuration complicated. Ta.
本発明は上記に鑑みてなされたもので、スリット円板を
挾んで発光素子と対向する位置に光ファイバーの一端を
臨ませ、受光素子及び該素子の出力波形を整形する波形
整形回路を制御装置の回路と一体に配−すると共に、前
記光ファイバの他端を受光素子に臨ませることにより、
波形整形回路郷を機関振動及び高温雰囲気から遠ざけて
回路を簡素化させつつその信頼性及び耐久性を向上させ
ることを目的とする。The present invention has been made in view of the above, and includes one end of an optical fiber facing a light emitting element across a slit disk, and a light receiving element and a waveform shaping circuit that shapes the output waveform of the element in a control device. By arranging the optical fiber integrally with the circuit and by making the other end of the optical fiber face the light receiving element,
The purpose of this invention is to simplify the circuit by moving the waveform shaping circuit away from engine vibration and high temperature atmosphere, and to improve its reliability and durability.
以下に本発明を図示された一実施例に基づいてであり、
図示しないクランク軸に同期して回転するディストリビ
ュータＤのシャツ）２０の上端には従来同様にロータ２
１を装着すると共に、従来同様のスリット円板２２を固
定している。ディストリビュータＤのカバー（図示省略
）には、前記スリット円板２２を挾み込むように断面略
Ｕ字状に形成された取付具２３を固定し、スリット円板
２２の１爾を照射する発光素子２４を取付具２３上部に
取付けている。そして、スリット円板２２を挾んで前記
発光素子２４と対向する取付具２３下部位置にそれぞれ
光ファイバ２５の一端を臨ませ、該ファイバ２ｓと取付
具２３とを固定具２６で結合同定している。２？は光フ
ァイバ２５の外皮、２＠は光ファイバ２ｓの端面に重ね
た集光レンズであって発光素子２４からスリットを通っ
て受光される光を強める。The present invention is based on an illustrated embodiment below,
At the upper end of the distributor D (shirt) 20, which rotates in synchronization with a crankshaft (not shown), there is a rotor 2, as in the conventional case.
1 is attached, and a slit disk 22 similar to the conventional one is fixed. A fixture 23 having a substantially U-shaped cross section is fixed to the cover (not shown) of the distributor D so as to sandwich the slit disc 22, and a light emitting element for illuminating one side of the slit disc 22 is fixed to the cover (not shown) of the distributor D. 24 is attached to the upper part of the fixture 23. Then, one end of the optical fiber 25 is made to face the lower part of the fixture 23 facing the light emitting element 24 with the slit disk 22 in between, and the fiber 2s and the fixture 23 are connected and identified by a fixture 26. . 2? 2@ is the outer skin of the optical fiber 25, and 2@ is a condensing lens superimposed on the end face of the optical fiber 2s, which intensifies the light received from the light emitting element 24 through the slit.
又、第６図は信号処暑のプレツクダイアグラムであり、
制御装置２１［は受光素子３０と、該素子の出力信号を
波形整形すると共に増巾する波形整形増巾回路３１と、
制御装置自体の入出力回路３２及び演算回路ｓ３勢を設
けており、前記光ファイバ２ｓの他端を受光素子３０に
臨ませている。Also, Fig. 6 is a preck diagram of the signal station heat.
The control device 21 includes a light receiving element 30, a waveform shaping amplification circuit 31 that shapes and amplifies the waveform of the output signal of the element,
An input/output circuit 32 and an arithmetic circuit s3 of the control device itself are provided, and the other end of the optical fiber 2s faces the light receiving element 30.
上記の構成において、機関の回転にともなってクランク
軸３４が回転すると、これに同期してシ転速度の号であ
り、その回転にともなって該円板２２のスリットが発光
素子２４と光ファイバ２５との間を通過すると、この通
過のたびごとに光ファイバ２５の一端に発光素子２４か
らの光が入射される。In the above configuration, when the crankshaft 34 rotates with the rotation of the engine, the rotation speed increases in synchronization with the rotation of the crankshaft 34. The light from the light emitting element 24 is incident on one end of the optical fiber 25 each time it passes between.
光ファイバ２５の一端に入射した光は、該ファイバ２５
中を光信号となって制御装置２８に伝送される。そして
、光ファイバ２５の他端から出る光信号が制御装置２Ｉ
内に設けた受光素子３ｏで検出されると、該素子３ｏか
ら電気信号が出方される。The light incident on one end of the optical fiber 25 is
The inside becomes an optical signal and is transmitted to the control device 28. The optical signal output from the other end of the optical fiber 25 is transmitted to the control device 2I.
When detected by the light receiving element 3o provided inside, an electric signal is output from the element 3o.
従って、スリットが発光素子２４の正面を通過するたび
ごとに受光索子３ｏがら信号が出力されることになり、
この信号は、波形整形増巾回路３１で波形整形された後
に増巾されて入出力回路３２を経て演算回路３３に供給
され、機関の制御に必要な回転信号、点火時期信号又は
燃料噴射時期信号等が得られる。Therefore, each time the slit passes in front of the light emitting element 24, a signal is output from the light receiving cable 3o.
This signal is waveform-shaped and amplified by a waveform shaping and amplification circuit 31, and then supplied to an arithmetic circuit 33 via an input/output circuit 32, and is used as a rotation signal, ignition timing signal, or fuel injection timing signal necessary for controlling the engine. etc. can be obtained.
尚、実施例では、スリット円板をディストリビユータの
シャフトに固定しているが、これをクランク軸に直接散
村けても同効であることは詳述するまでもない。又、発
光素子及び受光素子は必ずしも発光ダイオード及び受光
ダイオードに限定されるものではなく、あらゆる発光素
子及び受光素子を使用できることは勿論である。In the embodiment, the slit disk is fixed to the shaft of the distributor, but it goes without saying that the same effect can be achieved even if the disk is directly attached to the crankshaft. Further, the light-emitting element and the light-receiving element are not necessarily limited to the light-emitting diode and the light-receiving diode, and it goes without saying that any light-emitting element and light-receiving element can be used.
以上説明したように本発明によれば、フオ、トカプラを
構成する発光素子と受光素子とのうちの発光素子のみを
スリット円板に近設させて設け、受光素子及び該素子の
信号を処理する波形整形回路等を機関の制御装置の回路
内に組み込んで、機関振動及び高温雰囲気から回路を保
躾したうえで、スリット円板を挾んで発光素子と対向す
る位置と制御装置内の受光素子とを光ファイバを介して
連結したものであるから、機関高温雰囲気及び点火ノイ
ズ等による悪影響を予防しつつ回路を高温及び機関振動
等から容易に保護できるので回路構成を単純化しながら
も回路の信頼性及び耐久性を向上できる。又、波形整形
回路等を制御装置の回路と一体化しているので特別なケ
ース及びブラケットを設ける必要がなくなり、コストを
低減できると共に、回路の点検が容易化され、かつ、デ
ィストリビュータ等を小型化できるという利点がある。As explained above, according to the present invention, only the light-emitting element of the light-emitting element and the light-receiving element constituting the photocoupler is provided close to the slit disk, and the light-receiving element and the signal of the element are processed. After incorporating a waveform shaping circuit etc. into the circuit of the engine control device and maintaining the circuit from engine vibration and high temperature atmosphere, the position facing the light emitting element with the slit disk in between and the light receiving element in the control device are installed. Since these are connected via optical fibers, the circuit can be easily protected from high temperatures and engine vibrations while preventing the adverse effects of the engine's high-temperature atmosphere and ignition noise, simplifying the circuit configuration and improving circuit reliability. and can improve durability. In addition, since the waveform shaping circuit etc. are integrated with the control device circuit, there is no need to provide a special case or bracket, which reduces costs, makes it easier to inspect the circuit, and allows the distributor etc. to be made smaller. There is an advantage.
第１図は従来例の分解斜視図、第凶ノ１−１図の要部の
断面図、第３図は第１図の信号処理ブロックダイアグラ
ム、第４図は本発明の一実施例の要部の断面図、第５図
は第４図の一部の拡大断面図、第６図は第４図の信号処
理ブロックダイアグラムである。
２０・・・シャフト ２２・・・スリット円板 ２
４・・・発光素子 ２５・・・光ファイバ ２９川
制御装置 ３０・・・受光素子 ３１・・・波形整
形増巾回路 ３２・・・入出力回路 ３３・−・演
算回路特許用 願人 日産自動車株式金社
代理人 弁理士 笹 島 富二雄
第６図
１，７ＤFig. 1 is an exploded perspective view of the conventional example, a cross-sectional view of the main parts in Fig. 1-1, Fig. 3 is a signal processing block diagram of Fig. 1, and Fig. 4 is an outline of an embodiment of the present invention. 5 is an enlarged sectional view of a part of FIG. 4, and FIG. 6 is a signal processing block diagram of FIG. 4. 20...Shaft 22...Slit disk 2
4... Light emitting element 25... Optical fiber 29 River control device 30... Light receiving element 31... Waveform shaping amplification circuit 32... Input/output circuit 33... Arithmetic circuit patent applicant Nissan Motor Co., Ltd. Kinsha Co., Ltd. Agent Patent Attorney Fujio Sasashima Figure 6 1, 7D
Claims (1)
儒に発光素子を設け、スリット円板を介して発光素子と
対向する位置に光ファイバの一端を臨ませると共に、受
光素子及び該素子の出力波形を整形する波形整形回路を
峠制御装置の回路内に配設し、前記光ファイバの他端を
受光素子に臨ませたことを特徴とする内燃機関のクラン
ク角検出装置。A light emitting element is provided on a slit disk that rotates in synchronization with the rotation of the crankshaft, and one end of the optical fiber is placed opposite the light emitting element through the slit disk. 1. A crank angle detection device for an internal combustion engine, characterized in that a waveform shaping circuit for shaping an output waveform is disposed in a circuit of a pass control device, and the other end of the optical fiber faces a light receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18437981A JPS5886407A (en) | 1981-11-19 | 1981-11-19 | Detector for crank angle of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18437981A JPS5886407A (en) | 1981-11-19 | 1981-11-19 | Detector for crank angle of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5886407A true JPS5886407A (en) | 1983-05-24 |
Family
ID=16152165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18437981A Pending JPS5886407A (en) | 1981-11-19 | 1981-11-19 | Detector for crank angle of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5886407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3619898A1 (en) * | 1985-06-13 | 1986-12-18 | Diesel Kiki Co. Ltd., Tokio/Tokyo | CLOCK SIGNAL GENERATOR |
-
1981
- 1981-11-19 JP JP18437981A patent/JPS5886407A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3619898A1 (en) * | 1985-06-13 | 1986-12-18 | Diesel Kiki Co. Ltd., Tokio/Tokyo | CLOCK SIGNAL GENERATOR |
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