JPS628624B2 - - Google Patents
Info
- Publication number
- JPS628624B2 JPS628624B2 JP8272280A JP8272280A JPS628624B2 JP S628624 B2 JPS628624 B2 JP S628624B2 JP 8272280 A JP8272280 A JP 8272280A JP 8272280 A JP8272280 A JP 8272280A JP S628624 B2 JPS628624 B2 JP S628624B2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- injection time
- fuel injection
- fuel
- storing
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 23
- 239000007924 injection Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】
本発明は、燃料噴射式（以下、EFIという）エ
ンジンの燃料噴射時間を記憶する方法およびその
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for storing fuel injection time of a fuel injection type (hereinafter referred to as EFI) engine.
EFIエンジンにおいては、エンジン回転数Ne
およびスロツトル弁開度θth（あるいはエンジン
負圧PBなどの他のエンジンパラメータ）の値の
組合せに応じて、必要な燃料噴射時間を予じめメ
モリに記憶しておき、運転に際しては、センサで
検知された前記Neとθth等の値に基づいて前記
燃料噴射時間をメモリから読み取つて出力し、こ
れによつて燃料供給量を制御している。 In EFI engines, engine speed Ne
and throttle valve opening θth (or other engine parameters such as engine negative pressure PB), the required fuel injection time is stored in memory in advance and detected by a sensor during operation. The fuel injection time is read from the memory and output based on the values of the Ne, θth, etc. thus determined, thereby controlling the fuel supply amount.
このように、必要な燃料噴射時間をメモリに記
憶する際、実機を作動させ、Neおよびθthを一
定に保ちながら、噴射燃料量−すなわち、燃料噴
射時間を変化させて、排気ガス、馬力および燃費
等を実測し、これらの測定値を綜合判断して、最
適な燃料噴射時間Tiを決定し、前記Neおよびθ
thの組合せによつて決まるメモリのアドレスに前
記時間Tiを記憶している。 In this way, when storing the required fuel injection time in memory, the actual machine is operated, and while keeping Ne and θth constant, the amount of injected fuel - that is, the fuel injection time - is varied to calculate exhaust gas, horsepower, and fuel efficiency. etc., and make a comprehensive judgment based on these measured values to determine the optimal fuel injection time Ti.
The time Ti is stored at a memory address determined by the combination of th.
前記測定の場合、各測定毎にエンジンの温度や
周囲気圧が異なり、したがつて吸入空気の密度
（すなわち、質量）も異なつているが、従来はこ
れらの差を無視して、そのままのデータを用いて
記憶するのが普通である。 In the case of the above measurements, the engine temperature and ambient pressure differ for each measurement, and therefore the density (i.e. mass) of the intake air also differs, but conventionally these differences were ignored and the data was used as is. It is common to memorize using
ところで、明らかなように、排気ガス、馬力、
燃費等を、厳密に設計どおりに制御しようとする
場合、あるいは高地等で気圧が極端に低いような
場合には、吸入空気の温度や圧力の変化まで考慮
し、各爆発ごとに実際にエンジンに供給される混
合気の空燃比を正確に制御する必要がある。 By the way, as is clear, exhaust gas, horsepower,
When trying to control fuel efficiency, etc. strictly according to the design, or when air pressure is extremely low at high altitudes, etc., consider changes in intake air temperature and pressure, and adjust the actual engine pressure for each explosion. It is necessary to accurately control the air-fuel ratio of the supplied air-fuel mixture.
このために、運転時の吸入空気の温度や圧力を
実測して、メモリから読み出された噴射時間デー
タTiを(1)式によつて補正することが提案されて
いる。 For this purpose, it has been proposed to actually measure the temperature and pressure of the intake air during operation and correct the injection time data Ti read from the memory using equation (1).
Tio＝Ti×Ｐ／Ｐ０×Ｔ０／Ｔ ……(1)
ここで、Tioは補正された噴射時間、P0，T0は
標準状態の気圧、温度で、例えば、
P0＝１気圧
T0＝（273＋20）〓
Ｔ＝吸入空気の絶対温度
Ｐ＝吸入空気の圧力
しかしながら、前記したように、従来は、メモ
リに記憶された噴射時間データTi自体が、必ず
しも標準状態の下で測定されておらず、また標準
状態での値に換算もされていないので、従来の(1)
式による補正によつては厳密な制御が達成されな
い欠点があつた。 Tio=Ti×P/ P0 × T0 /T...(1) Here, Tio is the corrected injection time, P0 and T0 are the standard atmospheric pressure and temperature, for example, P0 =1 atm. T 0 = (273 + 20) 〓 T = Absolute temperature of intake air P = Pressure of intake air However, as mentioned above, conventionally, the injection time data Ti itself stored in memory is not necessarily measured under standard conditions. The conventional (1)
Correction using the formula has the disadvantage that strict control cannot be achieved.
本発明は、前記の従来技術の欠点を解消するた
めに、噴射時間のデータをメモリに記憶する際
に、それぞれの実測データをすべて標準状態での
値に換算しておくようにするものである。 In order to eliminate the drawbacks of the prior art described above, the present invention is such that, when storing injection time data in a memory, all measured data are converted into values under standard conditions. .
以下に、図面を参照して本発明を詳細に説明す
る。 The present invention will be explained in detail below with reference to the drawings.
図において、１はEFIエンジンであり、噴射時
間Tiで燃料が供給される。回転数Neおよびスロ
ツトル弁開度θthを設定値に保ち、燃料噴射時間
Tiを変化させ、測定器２〜４によつてそれぞれ
排気ガス、馬力、燃費等を実測する。 In the figure, 1 is an EFI engine, and fuel is supplied during injection time Ti. Keep the rotational speed Ne and throttle valve opening θth at the set values, and adjust the fuel injection time.
Ti is varied, and exhaust gas, horsepower, fuel consumption, etc. are measured using measuring instruments 2 to 4, respectively.
前記の排気ガス、馬力、燃費等の実測値を綜合
勘案し、これらの値が最適となつたときの燃料噴
射時Tiを読み取り、スイツチＳの操作により演
算器５に入力する。演算器５では、(2)式の演算を
行ない、実測値Tiを標準状態の値Tmに換算す
る。 The actual measured values of the exhaust gas, horsepower, fuel consumption, etc. are taken into account, and the fuel injection time Ti when these values become optimal is read and input to the calculator 5 by operating the switch S. The calculator 5 calculates the equation (2) and converts the measured value Ti into the standard state value Tm.
Tm＝Ti×Ｐ０／Ｐ×Ｔ／Ｔ０ ……(2)
一方、その時のNe，θthはアドレスカウンタ
等のアドレス指定器６に加えられ、前記換算値
Tmを記憶すべきメモリ７内のアドレスが指定さ
れる。このようにして、前記換算値Tmは指定ア
ドレスに記憶される。 Tm=Ti×P 0 /P×T/T 0 (2) On the other hand, Ne and θth at that time are added to an address designator 6 such as an address counter, and the converted value is
The address in memory 7 where Tm is to be stored is specified. In this way, the converted value Tm is stored at the designated address.
以上のように、本発明によれば、メモリ７内に
記憶される燃料噴射時間データTmはすべて圧力
P0，温度T0の標準状態に換算されているので、
実際にエンジンが作動される際の吸入空気の圧力
ＰおよびＴがわかれば、(3)式によつて厳密な補正
を行なうことができる。 As described above, according to the present invention, all the fuel injection time data Tm stored in the memory 7 are based on the pressure
Since it is converted to the standard state of P 0 and temperature T 0 ,
If the pressures P and T of the intake air when the engine is actually operated are known, exact correction can be made using equation (3).
Tio＝Tm×Ｐ／Ｐ０×Ｔ０／Ｔ ……(3)
なお、(2)(3)式においてT0／P0は定数Ｋとなる
ので、これらの式の代りに(4)(5)式が利用可能であ
ることはいうまでもない。 Tio=Tm×P/P 0 ×T 0 /T ……(3) In equations (2) and (3), T 0 /P 0 is a constant K, so instead of these equations, (4)( It goes without saying that formula 5) can be used.
Tm＝Ｉ／Ｋ・Ｔ／ＰTi ……(4) Tio＝ＫＰ／ＴTm ……(5) Tm=I/K・T/PTi...(4) Tio=KP/TTm...(5)
第１図は本発明の一実施例を示すブロツク図で
ある。
１……EFIエンジン、２〜４……測定器、５…
…演算器、６……アドレス指定器、７……メモ
リ。
FIG. 1 is a block diagram showing one embodiment of the present invention. 1...EFI engine, 2-4...measuring instrument, 5...
...Arithmetic unit, 6...Address designator, 7...Memory.
Claims (1)
転数および他の少なくとも１つの選択されたエン
ジンパラメータを設定値に保持しながら、燃料噴
射時間を変化させて、排気ガス、馬力および燃費
等の少なくとも１つを考慮した場合の運転状態が
最適となる燃料噴射時間Tiを決定する工程と、
前記最適状態になつた時のエンジン回転数、選択
されたエンジンパラメータ、吸入空気の温度Ｔ、
および吸入空気の圧力Ｐを測定する工程と、次式 Tm＝Ti×Ｐ０／Ｐ×Ｔ／Ｔ０ にしたがつて燃料噴射時間Tiを標準状態（温度
T0、圧力P0）の値Tmに補正演算する工程と、補
正された燃料噴射時間Tmを、エンジン回転数お
よび選択されたエンジンパラメータの組合せによ
つて指定されたメモリのアドレスに記憶する工程
とよりなることを特徴とするEFIエンジンの燃料
噴射時間記憶方法。 ２ 燃料噴射式エンジンに対する燃料噴射時間を
変化させる手段と、前記エンジンの回転数および
他の少なくとも１つの選択されたパラメータ、吸
入空気の圧力Ｐおよび温度Ｔならびにエンジンの
排気ガス、馬力、燃費等の少なくとも１つを測定
する手段と、排気ガス、馬力および燃費等の少な
くとも１つを考慮した場合の運転状態が最適とな
つた時の燃料噴射時間Tiを次式にしたがつて補
正演算する手段と、 Tm＝Ti×Ｐ０／Ｐ×Ｔ／Ｔ０ 前記補正値Tmを記憶するメモリと、エンジンの
回転数および前記選択されたパラメータにしたが
つて前記補正値Tmを記憶すべきメモリの番地を
指定する手段とを具備したことを特徴とするEFI
エンジンの燃料噴射時間記憶装置。Claims: 1. Operating a fuel-injected engine and varying fuel injection time while maintaining engine speed and at least one other selected engine parameter at a set point to reduce exhaust gas, horsepower, and a step of determining a fuel injection time Ti for which the driving condition is optimal when considering at least one such as fuel efficiency;
The engine speed when the optimum state is reached, the selected engine parameters, the intake air temperature T,
and the step of measuring the intake air pressure P, and the fuel injection time Ti is set to the standard state (temperature
T 0 , pressure P 0 )), and a step of storing the corrected fuel injection time Tm in a memory address specified by the combination of engine speed and selected engine parameters. A method for storing fuel injection time for an EFI engine, which is characterized by: 2. Means for varying the fuel injection time for a fuel-injected engine, the engine speed and at least one other selected parameter, the intake air pressure P and temperature T, and the engine exhaust gas, horsepower, fuel efficiency, etc. means for measuring at least one of them; and means for correcting and calculating the fuel injection time Ti when the operating condition is optimal in consideration of at least one of exhaust gas, horsepower, fuel efficiency, etc., according to the following formula. , Tm=Ti×P 0 /P×T/T 0 A memory for storing the correction value Tm and an address of the memory for storing the correction value Tm according to the engine rotation speed and the selected parameter. An EFI characterized by comprising a means for specifying
Engine fuel injection time storage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8272280A JPS578324A (en) | 1980-06-20 | 1980-06-20 | Fuel injection time memory method of efi engine and device for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8272280A JPS578324A (en) | 1980-06-20 | 1980-06-20 | Fuel injection time memory method of efi engine and device for the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS578324A JPS578324A (en) | 1982-01-16 |
| JPS628624B2 true JPS628624B2 (en) | 1987-02-24 |
Family
ID=13782293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8272280A Granted JPS578324A (en) | 1980-06-20 | 1980-06-20 | Fuel injection time memory method of efi engine and device for the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS578324A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0249374Y2 (en) * | 1986-04-12 | 1990-12-26 | ||
| JPH0531288Y2 (en) * | 1988-02-16 | 1993-08-11 |
-
1980
- 1980-06-20 JP JP8272280A patent/JPS578324A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS578324A (en) | 1982-01-16 |
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