JPS5920534A - Fuel feeder for internal combustion engine - Google Patents
Fuel feeder for internal combustion engineInfo
- Publication number
- JPS5920534A JPS5920534A JP13003482A JP13003482A JPS5920534A JP S5920534 A JPS5920534 A JP S5920534A JP 13003482 A JP13003482 A JP 13003482A JP 13003482 A JP13003482 A JP 13003482A JP S5920534 A JPS5920534 A JP S5920534A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- information
- throttle
- opening
- throttle opening
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、機関のスロットル開度と回転数によシ基本
燃料供給量を決定する内燃機関燃料供給装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an internal combustion engine fuel supply system that determines a basic fuel supply amount based on the throttle opening and engine speed of the engine.
この種の装置を実用に供しようとした場合、スロットル
開度が、たとえば２０度以下のような比較的閉じている
領域では、スロットル開度の微小変化に対しても、吸入
空気量の変化量が大きく、しかも直線的な変化ではなく
、スロットル開度が全閉に近ければ近いほど急激な勾配
で変化する。When trying to put this type of device into practical use, in a relatively closed region where the throttle opening is less than 20 degrees, the amount of change in intake air amount will be is large, and the change is not linear, but changes at a steeper gradient the closer the throttle opening is to fully closed.
したがって、基本燃料量もそれに応じて変化させる必要
があるので、この領域でのスロットル開度は０．１％以
下と云う非常に細かい分離能で取シ込む必要がある。Therefore, the basic fuel amount needs to be changed accordingly, so the throttle opening in this region needs to be taken in with a very fine separation of 0.1% or less.
このため、従来一般に使われているようなスロットル開
度に比例した出力電圧の得られるスロットルセンサの信
号をスロットル開度情報として使用した場合、１２ピツ
トのＡ／Ｄ（アナログ／ディジタル）変換器など、非常
に高価な部品を使用せざるを得ないという欠点があった
。For this reason, if a signal from a commonly used throttle sensor that provides an output voltage proportional to the throttle opening is used as throttle opening information, it is difficult to use a 12-pit A/D (analog/digital) converter, etc. However, the disadvantage was that very expensive parts had to be used.
この発明は上記従来の欠点を除去するためになされたも
ので、従来一般に使われているような、スロットル開度
に応じた出力電圧の得られるスロットルセンナの信号を
、出力電圧に応じた周波数に変換し、この周波数をタイ
マ手段で読み取ることによシ、高価なＡ／Ｄ変換器など
を使用しなくても、スロットルが比較的閉じている領域
での開度情報を細かい分解能で取り込むことができる内
燃機関燃料供給装置を提供することを目的とする。This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology.The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology. By converting the frequency and reading this frequency using a timer means, it is possible to capture information on the opening degree in a region where the throttle is relatively closed with fine resolution without using an expensive A/D converter. The purpose of the present invention is to provide an internal combustion engine fuel supply system that can provide fuel for an internal combustion engine.
以下、この発明の内燃機関燃Ｎ１＃給装置の実施例を図
について説明する。第１図はその一実施例におけるコン
ピュータ部のグロック図である。この第１図において、
１はスロットル開度に応じて抵抗値の変化するスロット
ルセンサであり、電源２からの一定電圧が一方の終端に
加えられており、他端は接地されているので、出力信号
としてはスロットル開度に応じた電圧が得られるように
なっている。開度は図中の矢印Ａ方向に犬となるもので
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the internal combustion engine fuel N1# supply device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a computer section in one embodiment. In this Figure 1,
1 is a throttle sensor whose resistance value changes depending on the throttle opening, and a constant voltage from the power supply 2 is applied to one end, and the other end is grounded, so the output signal is the throttle opening. The voltage can be obtained according to the voltage. The opening angle is in the direction of arrow A in the figure.
また、３は電圧−周波数変換器（以下、Ｖ−Ｆ変換器と
云う）であり、入力電圧に比例した周波数出力が得られ
るものであシ、この出力は中央演算制御部５に送出する
ようになっている。Further, 3 is a voltage-frequency converter (hereinafter referred to as a V-F converter), which can obtain a frequency output proportional to the input voltage, and this output is sent to the central processing control section 5. It has become.
インターバルタイマ４は図では２個の独立した１６ビツ
トタイマを内蔵しており、一つは前記周波数の周期計測
に、他方は機関へ燃料を供給する電磁噴射弁７の開口時
間制御に使用されている。In the figure, the interval timer 4 includes two independent 16-bit timers, one of which is used to measure the period of the frequency, and the other is used to control the opening time of the electromagnetic injection valve 7 that supplies fuel to the engine. .
中央演算制御部５は回転数情報８、吸気温９、水温ｌ０
１０．センサ情報１１などの機関の作動パラメータに応
じて燃料供給量を演算、決定するものである。The central processing control unit 5 has rotation speed information 8, intake temperature 9, and water temperature l0.
10. The fuel supply amount is calculated and determined according to engine operating parameters such as sensor information 11.
上記インターバルタイマ４からの信号は、駆動回路６で
電流増幅するようになっており、この駆動回路６の出力
によシミ磁噴射弁７を駆動するようになっている。The signal from the interval timer 4 is amplified in current by a drive circuit 6, and the output of this drive circuit 6 is used to drive the stain magnetic injection valve 7.
第２図はスロットル開度と、スロットル出力電圧を周波
数に変換した後の周期との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the throttle opening and the period after converting the throttle output voltage into a frequency.
次に以上のように構成されたこの発明の内燃機関燃料供
給装置の動作について説明する。スロットルセンサ１は
ここでは、図示していないがスロットルバルブに連動す
るように機械的に連結されてお）、常にスロットル開度
に比例した出力電圧を発生している。Next, the operation of the internal combustion engine fuel supply system of the present invention configured as described above will be explained. The throttle sensor 1 is mechanically connected to a throttle valve (not shown here) and always generates an output voltage proportional to the throttle opening.
アクセルを踏み込んでスロットル開度が大きくなれば、
スロットルセンサ１の出力゛電圧は大きく、逆にアクセ
ルから足を離して、スロットルが閉じればスロットルセ
ンサ１の出力′電圧は小さくなるようになっている。If you step on the accelerator and the throttle opening increases,
The output 'voltage' of the throttle sensor 1 is large, and conversely, when the foot is removed from the accelerator and the throttle is closed, the output 'voltage' of the throttle sensor 1 becomes small.
このスロットルセンサ１の出力電圧はＶ／Ｆ変換器３に
入力され、スロットルセンサ１の出力電圧に比例した周
波数の電気信号に変換される。したがって、スロットル
開度が大きければ周波数の高い電気信号が得られ、また
スロットル開度が小さければ周波数の低い電気信号が得
られるようになっている。The output voltage of the throttle sensor 1 is input to a V/F converter 3 and converted into an electrical signal with a frequency proportional to the output voltage of the throttle sensor 1. Therefore, if the throttle opening is large, an electrical signal with a high frequency can be obtained, and if the throttle opening is small, an electrical signal with a low frequency can be obtained.
この周波数信号は中央演算制御部５の中にあるマイクロ
コンピュータを介してインターバルタイマ４により、周
期が読み取られる。したがって、スロットル開度と周期
′Ｉ゛との関係は第２図に示すごとく、スロットル開度
が小さい場合には、スロットル開度の偏差に対して非常
に急勾配の入力信号が得られ、通にスロットル開度が大
きい場合には、スロットル開度の偏差に対して、勾配の
緩やかな入力信号が得られる。つまシ、開度小の領域で
は分解能が非常に置く、開度大の領域では分解能が低く
なっている。The cycle of this frequency signal is read by the interval timer 4 via the microcomputer in the central processing control section 5. Therefore, as shown in Fig. 2, the relationship between the throttle opening and the period 'I'' is such that when the throttle opening is small, an input signal with a very steep slope is obtained with respect to the deviation of the throttle opening, and the When the throttle opening is large, an input signal with a gentle slope is obtained with respect to the deviation of the throttle opening. The resolution is very high in areas with small openings, and low in areas with large openings.
ここでスロットル開度と吸入空気量の関係を考えてみる
とスロットル開度が全開に近いような比較的閉じている
領域ではスロットル開度の微小変化に対しても、吸入空
気量の変化量が大きく、逆にスロットル開度が全開に近
いような領域ではスロットル開度が多少変化しても、吸
入空気量はほとんど変化せず、スロットル開度に対して
、吸入空気量は単純な比例関係でなく、スロットル開度
が全開に近ければ近いほど吸入空気量は急激な勾配で変
化するとＩ／）う関係がある。If we consider the relationship between the throttle opening and the intake air amount, we can see that in a relatively closed region where the throttle opening is close to fully open, the amount of change in the intake air amount changes even with a minute change in the throttle opening. Conversely, in the region where the throttle opening is close to full open, the intake air amount hardly changes even if the throttle opening changes slightly, and the intake air amount is simply proportional to the throttle opening. There is a relationship that the intake air amount changes at a steeper gradient as the throttle opening is closer to full open.
このため、スロットル開度と回転数により、吸入空気量
に対応した燃料量を制御する場合、スロットル開度が大
の領域では、開度情報の分解能はあまり要求されないが
、スロットル開度が小の領域では、開度情報の分解能は
帆１条以上が要求される。Therefore, when controlling the amount of fuel corresponding to the amount of intake air using the throttle opening and rotation speed, the resolution of the opening information is not required in the region where the throttle opening is large, but when the throttle opening is small, In this area, the resolution of opening degree information is required to be one sail or more.
しかし、上記のようにスロットル電圧を周波数に変換し
、その周期をスロットル開度情報として取り込めば、要
求分解能に対応して、スロットル開度が小の領域では非
常に分解能の高い入力信号が得られ、また開度の大の領
域ではいたずらに分）官能の旨くない相応の入力信号が
得られるので、実使用に対応し７て分解能の効率もよく
、非常に都合がよい１、
周期を計測するだめのインターバルタイマ４はＡ７・Ｄ
コンバータなどに比較して、製造法など技術的に困難で
ないのでコストも安く、まだＶ／Ｆ変換器３もスロット
ル開度が閉じているときの開度と周波数の対応をたとえ
ば、中央演算制御部５のマイクロコンピュータを使用し
てオフセット調整を行なう、などの方法により調聚する
ようにしておけば、直線性は多少悪くても、第３図に示
すように、直線性誤差・、ｆがあっても、分解能および
精度の必要なスロットル開度小の領域の精度も十分であ
シコストの高い高級々Ｖ／ｌ・” ｉ換器を開用する必
要もなく、コストは安くてすむ。However, if the throttle voltage is converted to a frequency as described above and the frequency is taken in as throttle opening information, an input signal with very high resolution can be obtained in the region where the throttle opening is small, corresponding to the required resolution. In addition, in the region of large opening degrees, a suitable input signal that is not sensual can be obtained, so it is suitable for practical use, has good resolution efficiency, and is very convenient 1. To measure the period. The useless interval timer 4 is A7/D.
Compared to converters, etc., the production method is not technically difficult, so the cost is low, and the V/F converter 3 still requires a central processing control unit to determine the correspondence between the throttle opening and frequency when the throttle opening is closed. If the tuning is done by a method such as performing offset adjustment using the microcomputer shown in Figure 3, even if the linearity is somewhat poor, there will be a linearity error, f, as shown in Figure 3. However, the accuracy in the small throttle opening range where resolution and precision are required is sufficient, and there is no need to use an expensive high-end V/l/I converter, so the cost is low.
以上のように周期に変換されたスロットル開度情報は中
央演算制御１１μｓに入力され、回転数情報８とにより
２次元のマツプにより基本燃料量が決定される。さらに
この基本燃料量は吸気温情報９、水温情報１０．０２セ
ンサ情報１１などにより、補正演算され、インターバル
タイマ４に電磁噴射弁７の開口時間として出力される。The throttle opening information converted into a cycle as described above is input to the central processing control 11 μs, and the basic fuel amount is determined based on a two-dimensional map based on the rotational speed information 8. Further, this basic fuel amount is corrected and calculated based on intake temperature information 9, water temperature information 10, sensor information 11, etc., and is output to the interval timer 4 as the opening time of the electromagnetic injection valve 7.
電磁噴射弁７はインターバルタイマ４による開口時間に
応じて、内燃機関に必要かつ適正な燃料量を供給する。The electromagnetic injection valve 7 supplies a necessary and appropriate amount of fuel to the internal combustion engine according to the opening time determined by the interval timer 4.
以上のように、この発明の内燃機関燃料供給装置によれ
ば、スロットルセンサによりスロットル開度に応じた電
圧を取り出し、この電圧に応じた周波数を電圧−周波数
変換手段で取り出し、この周波数をタイマ手段で読みと
り、この周波数情報と回転数により基本燃料量で制御す
るようにしたので、装置が安価にでき、また分解能、精
度とも十分なものが得られる効果がある。As described above, according to the internal combustion engine fuel supply system of the present invention, the throttle sensor extracts the voltage corresponding to the throttle opening, the voltage-frequency conversion means extracts the frequency corresponding to this voltage, and the timer means Since the basic fuel amount is controlled based on this frequency information and rotation speed, the device can be made at a low cost and has sufficient resolution and accuracy.
第１図はこの発明の内燃機関燃料供給装置の一実施例に
おけるコンピュータ部を示すブロック図、第２図は同上
内燃機関燃料供給装置におけるスロットル開度と開度に
対応した周期との関係を示すダラ７、第３図は同上内燃
機関燃料供給装置における電圧−周波数変換器の直線性
に誤差がある場合のスロットル開度と、周波数との関係
を示すグラフである５、
■・・・スロットルセンサ、３・・・電圧−周波数変換
器六 ４ インターバルタイマ、５・・・中央演算制御
部、６・・・駆動回路、７・・電磁噴射弁。
代理人 葛 野 侶 −
呵
Ｒ″ト
町 剥〉FIG. 1 is a block diagram showing a computer section in an embodiment of the internal combustion engine fuel supply system of the present invention, and FIG. 2 shows the relationship between the throttle opening and the period corresponding to the opening in the internal combustion engine fuel supply system. Dara 7, Figure 3 is a graph showing the relationship between throttle opening and frequency when there is an error in the linearity of the voltage-frequency converter in the internal combustion engine fuel supply system described above. 5, ■...Throttle sensor , 3... Voltage-frequency converter 6 4 Interval timer, 5... Central calculation control unit, 6... Drive circuit, 7... Electromagnetic injection valve. Agent: Tsuyoshi Kuzuno − 呵
R″To-cho strip〉
Claims (1)
量を制御する内燃機関燃料供給装置において、前記スロ
ットル開度に応じた出力電圧の得られるスロットルセン
サと、このスロットルセンサの出力電圧に応じたＪ−波
数の得られる電圧−周波数変換手段とこの電圧−周波数
変換手段で得られる周波数を読みとるタイマ手段と、上
記周波数情報と上記内燃機関の回転数によシ基本燃料量
を制御する手段とを備えてなることを特徴とする内燃機
関燃料供給装置。In an internal combustion engine fuel supply system that controls the basic amount of fuel to the engine based on the engine's throttle opening and engine speed, there is provided a throttle sensor that can obtain an output voltage according to the throttle opening, and a throttle sensor that can obtain an output voltage according to the throttle opening. A voltage-frequency conversion means for obtaining the J-wave number, a timer means for reading the frequency obtained by the voltage-frequency conversion means, and a means for controlling the basic fuel amount according to the frequency information and the rotation speed of the internal combustion engine. An internal combustion engine fuel supply device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13003482A JPS5920534A (en) | 1982-07-24 | 1982-07-24 | Fuel feeder for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13003482A JPS5920534A (en) | 1982-07-24 | 1982-07-24 | Fuel feeder for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5920534A true JPS5920534A (en) | 1984-02-02 |
Family
ID=15024501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13003482A Pending JPS5920534A (en) | 1982-07-24 | 1982-07-24 | Fuel feeder for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920534A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61148828U (en) * | 1985-03-06 | 1986-09-13 | ||
| JPS62121244U (en) * | 1986-01-27 | 1987-08-01 | ||
| JPH01134621U (en) * | 1988-03-07 | 1989-09-13 | ||
| GB2478087A (en) * | 2006-04-21 | 2011-08-24 | Flowserve Man Co | Rotary encoder frequency analysis |
| US8471194B2 (en) | 2006-04-21 | 2013-06-25 | Flowserve Management Company | Rotary encoder for diagnosing problems with rotary equipment |
| US9086335B2 (en) | 2006-04-21 | 2015-07-21 | Flowserve Management Company | Rotary encoder frequency analysis |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427494A (en) * | 1977-08-02 | 1979-03-01 | Shizuoka Seiki Co Ltd | Linearlizing circuit in grain moisture content measuring apparatus |
-
1982
- 1982-07-24 JP JP13003482A patent/JPS5920534A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427494A (en) * | 1977-08-02 | 1979-03-01 | Shizuoka Seiki Co Ltd | Linearlizing circuit in grain moisture content measuring apparatus |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61148828U (en) * | 1985-03-06 | 1986-09-13 | ||
| JPS62121244U (en) * | 1986-01-27 | 1987-08-01 | ||
| JPH0535946Y2 (en) * | 1986-01-27 | 1993-09-10 | ||
| JPH01134621U (en) * | 1988-03-07 | 1989-09-13 | ||
| GB2478087A (en) * | 2006-04-21 | 2011-08-24 | Flowserve Man Co | Rotary encoder frequency analysis |
| GB2478087B (en) * | 2006-04-21 | 2011-12-07 | Flowserve Man Co | Valve system |
| US8471194B2 (en) | 2006-04-21 | 2013-06-25 | Flowserve Management Company | Rotary encoder for diagnosing problems with rotary equipment |
| US9086335B2 (en) | 2006-04-21 | 2015-07-21 | Flowserve Management Company | Rotary encoder frequency analysis |
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