JPS6341629A - Electronic control fuel injection system for internal combustion engine - Google Patents
Electronic control fuel injection system for internal combustion engineInfo
- Publication number
- JPS6341629A JPS6341629A JP18331386A JP18331386A JPS6341629A JP S6341629 A JPS6341629 A JP S6341629A JP 18331386 A JP18331386 A JP 18331386A JP 18331386 A JP18331386 A JP 18331386A JP S6341629 A JPS6341629 A JP S6341629A
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- engine
- racing
- injection amount
- driving state
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 66
- 239000007924 injection Substances 0.000 title claims abstract description 66
- 239000000446 fuel Substances 0.000 title claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 title claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims 1
- 238000010981 drying operation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 12
- 238000007664 blowing Methods 0.000 description 11
- 230000001133 acceleration Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は内燃機関の電子制御燃料噴射装置に関する。[Detailed description of the invention] <Industrial application field> The present invention relates to an electronically controlled fuel injection system for an internal combustion engine.
〈従来の技術〉
内燃機関の電子制御燃料噴射装置の従来例として以下の
ようなものがある。<Prior Art> The following is a conventional example of an electronically controlled fuel injection device for an internal combustion engine.
すなわち、エアフローメータ等により検出された吸入空
気流量Ｑと機関回転速度Ｎとから基本噴射量Ｔｐ ”’
Ｋ Ｘ Ｑ／ Ｎ （Ｋは定数）を演算すると共に主
として水温に応じた各種補正係数Ｃ０ＥＦと空燃比フィ
ードハック補正係数αとバッテリ電圧による補正係数Ｔ
、とを演算した後定常運転時における燃料噴射量Ｔ、＝
Ｔ゛ｐ ｘｃＯＥＦｘα十Ｔ、を演算する。That is, the basic injection amount Tp is determined from the intake air flow rate Q detected by an air flow meter etc. and the engine rotation speed N.
In addition to calculating K
, after calculating the fuel injection amount T during steady operation, =
T゛pxcOEFxα+T is calculated.
そして、例えばシングルポイン１〜インジエクシヨンシ
ステム（以下ＳＰ１方式）では機関の２回転毎に点火信
号等に同期して燃料噴射弁に対し前記燃料噴射量Ｔ１に
対応するパルス中の噴射パルス信号を出力し機関に燃料
を供給する。For example, in a single point 1 to injection system (hereinafter referred to as SP1 system), an injection pulse signal in a pulse corresponding to the fuel injection amount T1 is sent to the fuel injection valve in synchronization with an ignition signal etc. every two revolutions of the engine. output and supply fuel to the engine.
また、加速運転時にはスロットル弁の開弁速度等から求
められた加速増量係数Ｋ ａ Ｃｅを前記各種補正係数
Ｃ０ＥＦに加算し加速運転時の燃料噴射量Ｔ１を求め、
加速増量を図り機関出力を増大させるようにしている。In addition, during acceleration operation, the acceleration increase coefficient K a Ce obtained from the opening speed of the throttle valve, etc. is added to the various correction coefficients C0EF to obtain the fuel injection amount T1 during acceleration operation,
The engine output is increased by increasing acceleration.
ところで、１噴射回数当りの最大基本噴射量Ｔ７．が設
定されており、実際の吸入空気流量Ｑと機関回転速度″
Ｎとから演算された基本噴射量ＴＰが前記最大基本噴射
量Ｔ Ｐ ｍ ａ Ｘを超えたときにはこの最大基本噴
射量Ｔ ＋’ｍａｘに基づいて燃料噴射量Ｔ。By the way, the maximum basic injection amount per number of injections T7. are set, and the actual intake air flow rate Q and engine rotation speed''
When the basic injection amount TP calculated from N exceeds the maximum basic injection amount T P m a X, the fuel injection amount T is calculated based on this maximum basic injection amount T +'max.
を演算するようにしている。I am trying to calculate.
〈発明が解決しようとする問題点〉
しかしながら、このような従来の電子制御燃料噴射装置
では、空吹し運転時の吸入空気流量増加が特に大きいた
め、燃料噴射量の演算遅れ、機関への燃料供給遅れ等が
発生して空燃比がリーン化し吹」−り特性が良くないと
いう不具合があった。<Problems to be Solved by the Invention> However, in such conventional electronically controlled fuel injection systems, the increase in the intake air flow rate during dry running is particularly large, resulting in a delay in calculation of the fuel injection amount and a reduction in fuel supply to the engine. There was a problem in that the air-fuel ratio became lean due to supply delays and the blowing characteristics were not good.
また、空吹し運転時の吸入空気流量増加が特に大きいた
め、前記最大基本噴射量Ｔ、□ａｘに燃料噴射量Ｔ１が
拘束されこれによっても空燃比がリーン化し吹上り特性
が良くなかった。Furthermore, since the increase in the intake air flow rate during the dry blowing operation is particularly large, the fuel injection amount T1 is restricted to the maximum basic injection amount T, □ax, which also causes the air-fuel ratio to become lean and the blow-up characteristics to be poor.
本発明は、このような実状に鑑みてなされたもので、空
吹し運転時の吹上り特性を向」−できる電子制御燃料噴
射装置を提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an electronically controlled fuel injection device that can improve the blow-up characteristics during dry-flying operation.
〈問題点を解決するための手段〉
このため、本発明は第１図に示すように、機関の運転状
態を検出する機関運転状態検出手段Ａと、検出された運
転状態に応じて燃料噴射量を設定する燃料噴射量設定手
段Ｂと、機関の空吹し運転状態を検出する空吹し運転状
態検出手段Ｃと、空吹し運転状態が検出されたときに前
記設定された燃料噴射量を増量補正する空吹し増量補正
手段りと、前記設定された燃料噴射量若しくは増量補正
された燃料噴射量に応じて燃料噴射弁Ｅを開閉駆動する
駆動手段Ｆと、を備えるようにした。<Means for Solving the Problems> For this reason, the present invention, as shown in FIG. a fuel injection amount setting means B for setting the fuel injection amount; a racing state detection means C for detecting the racing state of the engine; and a racing state detecting means C for detecting the racing state of the engine; The present invention includes a dry-injection increase correction means for correcting an increase in the amount of fuel, and a drive means F for driving the fuel injection valve E to open and close in accordance with the set fuel injection amount or the increase-corrected fuel injection amount.
く作用〉
このようにして、空吹し運転時に燃料噴射量を増量補正
し吹」二り特性を向上させるようにした。Effect> In this way, the fuel injection amount is increased and corrected during the dry blowing operation to improve the blow dry characteristics.
〈実施例〉
以下に、本発明の一実施例を第２図及び第３図に基づい
て説明する。<Example> An example of the present invention will be described below with reference to FIGS. 2 and 3.
図において、マイクロコンピュータからなる制御装置１
には、回転速度センサ２からの回転速度信号と、エアフ
ローメータ３からの吸入空気流量信号と、スロットル開
度センサ４からのスロットル弁開度信号と、アイドルス
イッチ５からのＯＮ・ＯＦＦ信号と、空吹し運転状態検
出手段としてのニュートラルスイッチ６からのニュート
ラル信号と、車速センサ７からの車速信号と、が入力さ
れている。制御装置１は第３図に示すフローチャートに
従って作動し燃料噴射弁８の駆動回路９に噴射パルスを
出力するようになっている。In the figure, a control device 1 consisting of a microcomputer
The rotation speed signal from the rotation speed sensor 2, the intake air flow rate signal from the air flow meter 3, the throttle valve opening signal from the throttle opening sensor 4, and the ON/OFF signal from the idle switch 5, A neutral signal from a neutral switch 6 as means for detecting a racing state and a vehicle speed signal from a vehicle speed sensor 7 are input. The control device 1 operates according to the flowchart shown in FIG. 3 and outputs an injection pulse to the drive circuit 9 of the fuel injection valve 8.
ここでは、制御装置１が燃料噴射量設定手段と空吹し増
量補正手段とを構成し、制御装置１と駆動回路９とによ
り駆動手段が構成される。また、回転速度センサ２とエ
アフローメータ３とスロットル開度センサ４とにより機
関運転状態検出手段が構成される。Here, the control device 1 constitutes a fuel injection amount setting means and a dry fuel increase correction means, and the control device 1 and the drive circuit 9 constitute a drive means. Further, the rotation speed sensor 2, the air flow meter 3, and the throttle opening sensor 4 constitute engine operating state detection means.
次に作用を第３図に示すフローチャートに従って説明す
る。Next, the operation will be explained according to the flowchart shown in FIG.
ＳｌではアイドルスイッチがＯＦＦか否かを判定しＹＥ
Ｓのときには非アイドル運転時と判定しＳ２に進めＮＯ
のときにはアイドル運転時と判定しＳ３に進む。SL determines whether the idle switch is OFF or not, and selects YES.
When S is determined to be non-idling operation, proceed to S2 and NO
When this happens, it is determined that the vehicle is idling, and the process proceeds to S3.
Ｓ２では前回の空吹し増量補正係数ＫＴＰが０か否かを
判定し、ＹＥＳのときには前回は空吹し増量がなされて
いないと判定しＳ４に進みＮＯのときには前回も空吹し
増量が行われていると判定しＳ５に進む。In S2, it is determined whether the previous dry fuel increase correction coefficient KTP is 0 or not. If YES, it is determined that the fuel boost was not increased last time. If NO, the fuel boost is determined to have not been increased last time. It is determined that it is correct, and the process proceeds to S5.
Ｓ４ではニュートラルスイッチがＯＮか否かを判定しＹ
ＥＳのときにはＳ６に進みＮｏのときにはＳ３に進む。In S4, it is determined whether the neutral switch is ON or not.
When the answer is ES, the process proceeds to S6, and when the answer is No, the process proceeds to S3.
Ｓ６では検出された車速か所定値以下か否かを判定しＹ
ＥＳのときにはＳ７に進みＮＯのときにはＳ３に進む。In S6, it is determined whether the detected vehicle speed is less than a predetermined value or not.
When the answer is ES, the process proceeds to S7, and when the answer is NO, the process proceeds to S3.
Ｓ７では検出された機関回転速度が所定値以下か否かを
判定し、ＹＥＳのときにはＳ８に進みＮＯのときにはＳ
３に進む。In S7, it is determined whether the detected engine rotational speed is less than or equal to a predetermined value. If YES, the process advances to S8, and if NO, S7
Proceed to step 3.
Ｓ８では検出された機関回転速度と吸入空気流量に基づ
いて演算された前回の基本噴射量Ｔ１−１と今回の基本
噴射量Ｔ２との差ΔＴ、を演算する。In S8, the difference ΔT between the previous basic injection amount T1-1 and the current basic injection amount T2 calculated based on the detected engine speed and intake air flow rate is calculated.
Ｓ９では演算された差ΔＴＰが所定値以上か否かを判定
する。そして、ＹＥＳのときには吸入空気流量の増加が
大きく空吹し運転時と判定し３１０に進みＮｏのときに
はＳ３に進む。In S9, it is determined whether the calculated difference ΔTP is greater than or equal to a predetermined value. When the answer is YES, the increase in the intake air flow rate is large and it is determined that the operation is in a dry blow operation, and the process proceeds to 310, and when the answer is No, the process proceeds to S3.
ＳＩＯでは空吹し運転時の最大基本噴射量Ｔｃを設定し
、Ｓｌｌに進む。この最大基本噴射量Ｔ、はそれ以外の
通常運転時の最大基本噴射量Ｔ Ｐ ＩＩ ａ Ｘより
大きく設定されている。In SIO, the maximum basic injection amount Tc during dry-injection operation is set, and the process proceeds to Sll. This maximum basic injection amount T is set larger than the maximum basic injection amount T P II a X during normal operation other than that.
Ｓｌｌでは、空吹し運転時の噴射回数ＴＴＰをＯにリセ
ットした後、Ｓ１２では空吹し増量補正係数に□、を所
定値に設定する。In Sll, after resetting the number of injections TTP during the dry-blowing operation to O, in S12, the dry-blowing increase correction coefficient is set to a predetermined value.
また、Ｓ２で前回も空吹し増量がなされていると判定さ
れたときには、Ｓ５で空吹し運転時の最大基本噴射１ｊ
ｌＴ。を設定した後、３１３で前回の噴射回数Ｔ。、、
に１を加算し新たな噴射回数Ｔ Ｔ Ｐ １１を設定し
Ｓ１４に進む。In addition, when it is determined in S2 that the amount of dry fuel injection has been increased in the previous time, the maximum basic injection 1j during the dry fuel operation is determined in S5.
lT. After setting, the previous number of injections T is set at 313. ,,
1 is added to set a new number of injections T T P 11, and the process proceeds to S14.
Ｓ１４では新たな噴射回数Ｔ Ｔ Ｐ ＩＩが設定噴射
回数Ｔ、以下か否かを判定しＹＥＳのときには前記Ｓ１
２に進み、Ｎｏすなわち新たな噴射回数エア、Ｎが設定
噴射回数Ｔ。を超えたときにばＳ１５に進む。In S14, it is determined whether the new number of injections T T P II is less than or equal to the set number of injections T, and if YES, the step S1 is performed.
Proceed to step 2, No means new number of injections air, N means set number of injections T. If it exceeds this, the process advances to S15.
Ｓ１５では前回の空吹し増量補正係数ＫＴＰから所定値
に、を減算して新たな空吹し増量補正係数ＫＴＰＮを求
める。In S15, a predetermined value is subtracted from the previous air-fuel increase correction coefficient KTP to obtain a new air-air fuel increase correction coefficient KTPN.
また、Ｓｌでアイドル運転時と判定されたときにはＳ３
で空吹し増量補正係数に７．をＯに設定すこのようにし
て得られた空吹し増量補正係数に７．若しくはＫ ＴＰ
Ｈに基づいて空吹し運転時の燃料噴射量Ｔ、を求める。In addition, when it is determined that the idling operation is occurring in Sl, S3
Set the dry-air increase correction coefficient to 7. is set to O. Add 7. to the dry fuel increase correction coefficient obtained in this way. Or KTP
Based on H, the fuel injection amount T during the dry run operation is determined.
具体的には各種補正係数Ｃ０ＥＦに空吹し増量補正係数
ＫＴＰ若しくはＫ Ｔ、Ｎを加算して新たな各種補正係
数Ｃ０ＥＦＮを求めて従来例と同様に燃料噴射量Ｔ、（
＝Ｔ、ＸＣ０ＥＦＸα＋ｒｓ）を演算する。Specifically, new various correction coefficients C0EFN are obtained by adding the dry fuel increase correction coefficient KTP or KT,N to the various correction coefficients C0EF, and then the fuel injection amount T, (
=T, XC0EFXα+rs).
このようにして燃料噴射量Ｔ、を設定すると、空吹し運
転状態が開始されてから、設定噴射回数Ｔｏの！Ｕ１間
第４図に示すように略一定の空吹し増量が図れると共に
その後空炊し増量が経時と共に減少される。If the fuel injection amount T is set in this way, the set number of injections To will be increased after the start of the dry running state. As shown in FIG. 4 during U1, a substantially constant increase in the amount of dry cooking can be achieved, and after that, the increase in amount due to dry heating is reduced over time.
したがって、空吹し運転時に吸入空気流量が第４図に示
すように大巾に増加してもこの増加に追従して空吹し増
量が図れるため、空吹し運転時の吹上り特性を向上でき
る。具体的には第５図破線で示すように所定機関回転速
度まで立上る応答時間が従来例（第５図中実線示）に較
べ早くなる。Therefore, even if the intake air flow rate increases significantly during dry-blowing operation as shown in Figure 4, the dry-blowing amount can be increased to follow this increase, improving the blow-up characteristics during dry-blowing operation. can. Specifically, as shown by the broken line in FIG. 5, the response time for rising to a predetermined engine speed is faster than in the conventional example (shown by the solid line in FIG. 5).
特に本実施例では空吹し運転時の最大基本噴射量Ｔ、を
通常運転時より大きく設定したので、これによっても空
吹し増量を図れる。In particular, in this embodiment, the maximum basic injection amount T during the dry-injection operation is set to be larger than that in the normal operation, so that it is possible to increase the amount in the air-injection.
〈発明の効果〉
本発明は、以上説明したように、空吹し運転時に空吹し
増量を図るようにしたので、空吹し運転時の吹上り特性
を向上できる。<Effects of the Invention> As explained above, the present invention aims to increase the amount of air blowing during the air blowing operation, so that the blow-up characteristics during the air blowing operation can be improved.
【図面の簡単な説明】
第１図は本発明のクレーム対応図、第２図は本発明の一
実施例を示す構成図、第３図は同上のフローチャー１へ
、第４図及び第５図は同上の作用を説明するための図で
ある。
１・・・制御装置 ２・・・回転速度センサ ３・
・・エアフローメータ ６・・・ニュートラルスイッ
チ８・・・燃料噴射弁 ９・・・駆動回路特許出願人
日本電子機器株式会社
代理人 弁理士 笹 島 冨二ｆｔｉｔ耀賢冒砥（転
）保[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the present invention, FIG. 3 is a flowchart 1 of the same, and FIGS. The figure is a diagram for explaining the same effect as above. 1...Control device 2...Rotation speed sensor 3.
... Air flow meter 6 ... Neutral switch 8 ... Fuel injection valve 9 ... Drive circuit patent applicant Japan Electronics Co., Ltd. agent Patent attorney Tomiji Sasashima
Claims (1)
出された運転状態に応じて燃料噴射量を設定する燃料噴
射量設定手段と、機関の空吹し運転状態を検出する空吹
し運転状態検出手段と、空吹し運転状態が検出されたと
きに前記設定された燃料噴射量を増量補正する空吹し増
量補正手段と、前記設定された燃料噴射量若しくは増量
補正された燃料噴射量に応じて燃料噴射弁を開閉駆動す
る駆動手段と、を備えたことを特徴とする内燃機関の電
子制御燃料噴射装置。An engine operating state detection means for detecting the operating state of the engine, a fuel injection amount setting means for setting the fuel injection amount according to the detected operating state, and a dry running state for detecting the engine running state. a detecting means; a drying increase correction means for increasing the set fuel injection amount when a drying operation state is detected; An electronically controlled fuel injection device for an internal combustion engine, comprising: drive means for opening and closing a fuel injection valve accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61183313A JP2520608B2 (en) | 1986-08-06 | 1986-08-06 | Electronically controlled fuel injection device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61183313A JP2520608B2 (en) | 1986-08-06 | 1986-08-06 | Electronically controlled fuel injection device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6341629A true JPS6341629A (en) | 1988-02-22 |
| JP2520608B2 JP2520608B2 (en) | 1996-07-31 |
Family
ID=16133508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61183313A Expired - Fee Related JP2520608B2 (en) | 1986-08-06 | 1986-08-06 | Electronically controlled fuel injection device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520608B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08119677A (en) * | 1994-10-14 | 1996-05-14 | Kansai Kouriyuu Kk | Formation of surface protecting film for glass product and ceramics |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187538A (en) * | 1982-04-28 | 1983-11-01 | Hitachi Ltd | Electronic fuel injector |
| JPS6123842A (en) * | 1984-07-11 | 1986-02-01 | Fuji Heavy Ind Ltd | Fuel injection device for engine |
-
1986
- 1986-08-06 JP JP61183313A patent/JP2520608B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187538A (en) * | 1982-04-28 | 1983-11-01 | Hitachi Ltd | Electronic fuel injector |
| JPS6123842A (en) * | 1984-07-11 | 1986-02-01 | Fuji Heavy Ind Ltd | Fuel injection device for engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08119677A (en) * | 1994-10-14 | 1996-05-14 | Kansai Kouriyuu Kk | Formation of surface protecting film for glass product and ceramics |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520608B2 (en) | 1996-07-31 |
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