JP3345464B2 - Engine fuel supply - Google Patents
Engine fuel supplyInfo
- Publication number
- JP3345464B2 JP3345464B2 JP15186693A JP15186693A JP3345464B2 JP 3345464 B2 JP3345464 B2 JP 3345464B2 JP 15186693 A JP15186693 A JP 15186693A JP 15186693 A JP15186693 A JP 15186693A JP 3345464 B2 JP3345464 B2 JP 3345464B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injector
- engine
- pressure
- fuel injection
- 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 - Fee Related
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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0626—Measuring or estimating parameters related to the fuel supply system
- F02D19/0634—Determining a density, viscosity, composition or concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Description
【０００１】[0001]
【産業上の利用分野】本発明は、燃料性状の軽質、重質
に拘らず、インジェクタから噴射される燃料の気化特性
を一定化するようにしたエンジンの燃料供給装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply system for an engine, which stabilizes the vaporization characteristics of fuel injected from an injector regardless of whether the fuel is light or heavy.
【０００２】[0002]
【従来の技術】従来より、高圧燃料をインジェクタから
気筒内に直接噴射するようにした筒内直噴エンジンが知
られている。このような筒内直噴エンジンでは、インジ
ェクタから吸入空気に対して層状をなすように噴射され
た微粒化燃料に着火して燃焼させる、所謂成層燃焼が可
能であり、結果として希薄燃焼による大幅な燃費の向上
が得られる。2. Description of the Related Art Conventionally, there has been known an in-cylinder direct injection engine in which high-pressure fuel is directly injected from an injector into a cylinder. Such an in-cylinder direct injection engine is capable of so-called stratified combustion, which ignites and burns atomized fuel injected in a stratified form with respect to intake air from an injector, resulting in a large amount of lean combustion. Fuel efficiency can be improved.
【０００３】ここで、上記の筒内直噴エンジンの燃焼特
性は、インジェクタから噴射される燃料の気化特性に大
きく影響され、更にその燃料の気化特性は燃料が軽質で
あるか重質であるかという燃料性状の相違によって変化
するものであり、一般に重質燃料は軽質燃料に較べて気
化特性が劣ってしまう。[0003] Here, the combustion characteristics of the in-cylinder direct injection engine are greatly affected by the vaporization characteristics of the fuel injected from the injector, and the vaporization characteristics of the fuel are light or heavy. In general, heavy fuels are inferior in vaporization characteristics to light fuels.
【０００４】ちなみに、このような燃料性状の相違に対
応してインジェクタから噴射される燃料の気化特性を直
接的に補正する技術は未だ開発されておらず、僅かに関
連する技術が特開平３−１８６３８号公報、実開昭６２
−５９７４０号公報、特開昭５６−６６４４５号公報及
び特開昭６２−２８４９５２号公報等に見られるばかり
である。Incidentally, a technique for directly correcting the vaporization characteristics of the fuel injected from the injector in response to such a difference in fuel properties has not yet been developed, and a slightly related technique is disclosed in Japanese Patent Laid-Open Publication No. 18638, Japanese Utility Model Application 62
No. 59740, JP-A-56-66445 and JP-A-62-284952.
【０００５】すなわち、特開平３−１８６３８号公報に
開示された技術は、燃料の蒸発特性を判断するものであ
り、低蒸発性燃料の場合は、燃料の気化性及び霧化性が
低下するエンジンの特定運転領域において、燃料をより
増加させてエンジンの出力性能を維持させるものであ
る。That is, the technique disclosed in Japanese Patent Laid-Open Publication No. Hei 3-18638 is for judging the evaporation characteristics of fuel. In the case of a low-evaporation fuel, an engine in which the vaporization and atomization of the fuel is reduced. In the specific operating region, the output performance of the engine is maintained by further increasing the fuel.
【０００６】また、実開昭６２−５９７４０号公報に開
示された技術は、機関の吸気通路内の燃料との混合前の
吸入空気の温度を検出し、吸入空気と燃料との混合後の
混合気の温度を検出するとともに、少なくともこれらの
検出結果である温度差に基づいて使用燃料の性状を検出
し、使用燃料の性状に応じてエンジンの燃料供給量を補
正制御するものである。The technique disclosed in Japanese Utility Model Laid-Open Publication No. 62-59740 detects the temperature of intake air before mixing with fuel in an intake passage of an engine and mixes the intake air with fuel after mixing. In addition to detecting the temperature of the air, the properties of the fuel used are detected based on at least the temperature difference as a result of the detection, and the fuel supply amount of the engine is corrected and controlled in accordance with the property of the fuel used.
【０００７】更に、特開昭５６−６６４４５号公報に開
示された技術は、燃料タンクより気化器に至る燃料供給
道程中に、燃料を加熱する加熱器を設けることにより、
燃料の微粒化を良好に行って燃焼効率を高め、燃費を向
上させたものである。Further, the technology disclosed in Japanese Patent Application Laid-Open No. 56-66445 is to provide a heater for heating fuel in a fuel supply path from a fuel tank to a carburetor.
The fuel is finely atomized to improve the combustion efficiency and improve the fuel efficiency.
【０００８】更にまた、特開昭６２−２８４９５２号公
報に開示された技術は、エンジンに燃料を供給する送油
管の途中に、エンジン冷却水を熱源とする加熱器を介設
することにより、燃料の燃焼性を高め、エンジン出力の
向上を図ったものである。[0008] Furthermore, the technology disclosed in Japanese Patent Application Laid-Open No. 62-284952 discloses a fuel supply system in which a heater that uses engine cooling water as a heat source is provided in the middle of an oil supply pipe for supplying fuel to the engine. The aim is to improve the combustion performance of the engine and improve the engine output.
【０００９】[0009]
【発明が解決しようとする課題】ところで、上記の特開
平３−１８６３８号公報又は実開昭６２−５９７４０号
公報に記載の技術は、燃料の性状を判断して燃料供給量
を変えることはできるものの、燃焼特性を維持すること
はできない。一方、特開昭５６−６６４４５号公報又は
特開昭６２−２８４９５２号公報に記載の技術は、単に
燃料の加熱方法を示したものに過ぎず、同様に燃焼特性
を維持するものではない。The technique described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 3-18638 or Japanese Utility Model Application Laid-Open No. 62-59740 can change the fuel supply amount by judging the properties of the fuel. However, combustion characteristics cannot be maintained. On the other hand, the technology described in JP-A-56-66445 or JP-A-62-284952 merely shows a method of heating a fuel, and similarly does not maintain combustion characteristics.
【００１０】よって、現在の技術においては、たとえば
軽質燃料を基準とした場合、インジェクタに重質燃料が
供給されると、インジェクタから噴射される燃料の気化
特性が低下してエンジンの燃焼特性が不安定となり、排
ガスエミッション、燃費、走行性能等が低下するおそれ
がある。Therefore, according to the present technology, when heavy fuel is supplied to the injector, for example, when light fuel is used as a reference, the vaporization characteristics of the fuel injected from the injector are reduced and the combustion characteristics of the engine become poor. It becomes stable, and there is a possibility that exhaust gas emission, fuel efficiency, running performance, etc. may decrease.
【００１１】本発明は、このような事情に対処してなさ
れたもので、インジェクタに供給される燃料の燃料性状
の軽質、重質に拘らず、インジェクタから噴射される燃
料の気化特性を一定化することにより、エンジンの燃焼
特性を安定化することができるエンジンの燃料供給装置
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has made the vaporization characteristics of the fuel injected from the injector constant regardless of whether the fuel supplied to the injector is light or heavy. Accordingly, an object of the present invention is to provide an engine fuel supply device capable of stabilizing the combustion characteristics of the engine.
【００１２】[0012]
【課題を解決するための手段】本発明は、上記目的を達
成するために、エンジンに燃料を供給するインジェクタ
と、前記インジェクタに供給される燃料の燃料性状の軽
質及び重質を検出する燃料性状検出センサと、前記イン
ジェクタの燃料噴射圧力を制御する燃料噴射圧力制御手
段と、前記燃料性状検出センサの検出結果に基づき、軽
質燃料の場合には前記燃料噴射圧力制御手段による燃料
噴射圧力を所定値まで減少させかつ前記インジェクタの
燃料噴射パルス幅を拡大補正し、重質燃料の場合には前
記燃料噴射圧力を所定値まで上昇させかつ前記インジェ
クタの燃料噴射パルス幅を縮小補正することにより、前
記燃料の気化特性を一定化するように制御する気化特性
制御手段と、を具備することを特徴とする。According to the present invention, there is provided an injector for supplying fuel to an engine.
If the fuel property detecting sensor for detecting the light and heavy fuel property of fuel supplied to the injector, the fuel injection pressure control means for controlling the fuel injection pressure of the in-<br/> injector, the fuel property -out based on the detection result of the detection sensor, in the case of light fuel reduces the fuel injection pressure by the fuel injection pressure control means to a predetermined value and the injector
Enlarge and correct the fuel injection pulse width.
The fuel injection pressure is raised to a predetermined value and the injection
By Rukoto to reduction correction of the fuel injection pulse width of Kuta, before
Characterized by comprising a vaporization characteristic control means for controlling to constant the vaporization properties of Ki燃 fee, a.
【００１３】[0013]
【作用】本発明のエンジンの燃料供給装置では、気化特
性制御手段が燃料性状検出センサの検出結果に基づき、
軽質燃料の場合には燃料噴射圧力制御手段による燃料噴
射圧力を所定値まで減少させかつインジェクタの燃料噴
射パルス幅を拡大補正し、重質燃料の場合には燃料噴射
圧力を所定値まで上昇させかつインジェクタの燃料噴射
パルス幅を縮小補正することにより、燃料の気化特性を
一定化することができる。In the fuel supply device for an engine according to the present invention, the vaporization characteristic control means uses the fuel property detection sensor based on the detection result.
In the case of light fuel, the fuel injection pressure by the fuel injection pressure control means is reduced to a predetermined value and the fuel injected by the injector is reduced.
The injection pulse width is expanded and corrected, and in the case of heavy fuel, the fuel injection pressure is increased to a predetermined value and the fuel injection of the injector is performed.
The Rukoto to reduction correction pulse width, can be made constant vaporization characteristics of fuel.
【００１４】[0014]
【実施例】以下、本発明の実施例の詳細を図面に基づい
て説明する。図１は、本発明の燃料供給装置の一実施例
を示すもので、燃料タンク１が備えられている。燃料ポ
ンプ２によって吸い上げられた燃料は、フィルタ３によ
って濾過された後、低圧ライン１２を経て高圧ポンプ４
に供給される。ここで、低圧ライン１２に配設されてい
る燃料性状検出センサ１１が燃料性状である軽質、重質
を検出し、この検出結果をエンジン制御ユニットである
気化特性制御手段としてのＥＣＵ９に出力する。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a fuel supply device according to the present invention, in which a fuel tank 1 is provided. The fuel sucked up by the fuel pump 2 is filtered by the filter 3 and then passed through the low pressure line 12 to the high pressure pump 4.
Supplied to Here, the fuel property detection sensor 11 disposed in the low-pressure line 12 detects light or heavy fuel properties, and outputs the detection result to the ECU 9 as an engine control unit, which is a vaporization property control unit.
【００１５】高圧ポンプ４によって増圧された燃料は、
高圧用フィルタ５を経た後、コモンレール６を介してイ
ンジェクタ７に供給されることにより、図示省略のエン
ジンの気筒内に直接噴射される。The fuel intensified by the high-pressure pump 4 is
After passing through the high-pressure filter 5, it is supplied to the injector 7 via the common rail 6, so that it is directly injected into the cylinder of the engine (not shown).
【００１６】ここで、コモンレール６に配設されている
圧力センサ１４によってインジェクタ７からの燃料の噴
射圧力が検出されており、この検出結果は上記のＥＣＵ
９に出力される。インジェクタ７に供給されなかった残
りの燃料は、燃料噴射圧力制御手段としての高圧プレッ
シャ・レギュレータ８及び戻り管１０を経て燃料タンク
１内に戻される。Here, the pressure of fuel injection from the injector 7 is detected by a pressure sensor 14 disposed on the common rail 6, and the detection result is obtained by the ECU.
9 is output. The remaining fuel not supplied to the injector 7 is returned to the fuel tank 1 via the high pressure regulator 8 as a fuel injection pressure control means and the return pipe 10.
【００１７】上記のＥＣＵ９は、圧力センサ１４からの
検出結果及び燃料性状検出センサ１１からの検出結果に
基づいて、燃料ポンプ２及び高圧プレッシャ・レギュレ
ータ８をフィードバック制御する。The ECU 9 performs feedback control of the fuel pump 2 and the high-pressure regulator 8 based on the detection result from the pressure sensor 14 and the detection result from the fuel property detection sensor 11.
【００１８】すなわち、図２及び図３に示すように、一
般に燃料性状が重質である場合には、インジェクタ７か
ら噴射される燃料の気化特性が悪く、これに対し軽質の
場合には気化特性が良好である。そこで、燃料性状が重
質であれば高圧プレッシャ・レギュレータ８における燃
料圧力を高くし、軽質であれば燃料圧力を低くすること
で、気化特性を所定値Ｐに維持することが可能である。That is, as shown in FIGS. 2 and 3, when the fuel properties are generally heavy, the fuel injected from the injector 7 has poor vaporization characteristics, whereas when the fuel is light, the vaporization characteristics are poor. Is good. Therefore, the vaporization characteristics can be maintained at the predetermined value P by increasing the fuel pressure in the high-pressure pressure regulator 8 if the fuel property is heavy and decreasing the fuel pressure if the fuel property is light.
【００１９】したがって、ＥＣＵ９は、圧力センサ１４
からの検出結果及び燃料性状検出センサ１１からの検出
結果に基づいて、燃料ポンプ２及び高圧プレッシャ・レ
ギュレータ８をフィードバック制御し、気化特性を所定
値Ｐに維持する。Therefore, the ECU 9 is provided with the pressure sensor 14
The fuel pump 2 and the high-pressure pressure regulator 8 are feedback-controlled based on the detection result from the fuel pump and the fuel property detection sensor 11 to maintain the vaporization characteristics at a predetermined value P.
【００２０】続いて、このような構成の燃料供給装置の
動作を、図４を用いて説明する。まず、インジェクタ７
に供給される燃料の性状が燃料性状検出センサ１１によ
り高圧ポンプ４の前段において検出されると（ステップ
４０１）、ＥＣＵ９がその検出結果に基づき、重質燃料
であるか否かを判断する（ステップ４０２）。Next, the operation of the fuel supply device having such a configuration will be described with reference to FIG. First, the injector 7
When the property of the fuel supplied to the fuel cell is detected by the fuel property detection sensor 11 at a stage preceding the high-pressure pump 4 (step 401), the ECU 9 determines whether or not the fuel is heavy based on the detection result (step 401). 402).
【００２１】ＥＣＵ９が重質燃料であると判断した場
合、高圧プレッシャ・レギュレータ８に制御信号を出力
し、高圧プレッシャ・レギュレータ８における燃料圧力
を高める（ステップ４０３）。これにより、インジェク
タ７から噴射される燃料は、噴射圧力が高められること
で、気化特性が所定値まで上昇され、しかも、燃料圧力
の上昇によりインジェクタ７からの燃料噴射量が所定値
を上回らないようにするために、ＥＣＵ９によってイン
ジェクタ７の燃料噴射パルス幅が縮小補正される（ステ
ップ４０４）。When the ECU 9 determines that the fuel is heavy fuel, it outputs a control signal to the high pressure regulator 8 to increase the fuel pressure in the high pressure regulator 8 (step 403). As a result, the fuel injected from the injector 7 is increased in the injection pressure, so that the vaporization characteristics are increased to a predetermined value , and the fuel injection amount from the injector 7 is not increased above the predetermined value due to the increase in the fuel pressure. The fuel injection pulse width of the injector 7 is reduced and corrected by the ECU 9 (step 404).
【００２２】一方、（ステップ４０２）にて重質燃料で
ないと判断された場合、ＥＣＵ９が高圧プレッシャ・レ
ギュレータ８に制御信号を出力し、高圧プレッシャ・レ
ギュレータ８における燃料圧力を低下させる（ステップ
４０５）。これにより、インジェクタ７から噴射される
燃料は、噴射圧力が低下されることで、気化特性が所定
値まで下げられ、しかも、燃料圧力の低下によりインジ
ェクタ７からの燃料噴射量が所定値を下回らないように
するために、ＥＣＵ９によってインジェクタ７の燃料噴
射パルス幅が拡大補正される（ステップ４０６）。On the other hand, if it is determined in step 402 that the fuel is not heavy, the ECU 9 outputs a control signal to the high pressure regulator 8 to reduce the fuel pressure in the high pressure regulator 8 (step 405). . As a result, the fuel injected from the injector 7 has its injection pressure reduced, whereby the vaporization characteristics are reduced to a predetermined value , and the fuel injection amount from the injector 7 does not fall below the predetermined value due to the decrease in fuel pressure. In order to do so, the ECU 9 increases and corrects the fuel injection pulse width of the injector 7 (step 406).
【００２３】このように、本実施例においては、ＥＣＵ
９が燃料性状検出センサ１１からの検出結果に基づき、
軽質燃料の場合には高圧プレッシャ・レギュレータ８に
よる燃料噴射圧力を所定値まで減少させかつインジェク
タ７の燃料噴射パルス幅を拡大補正し、重質燃料の場合
には燃料噴射圧力を所定値まで上昇させかつインジェク
タ７の燃料噴射パルス幅を縮小補正することにより、イ
ンジェクタ７に供給される燃料性状の軽質、重質に拘ら
ず、燃料の気化特性を一定化するようにしたので、エン
ジンの燃焼特性を安定化することができる。また、エン
ジンの燃焼特性を安定化することにより、排ガスエミッ
ション、燃費、走行性能の向上が期待できる。As described above, in the present embodiment, the ECU
9 is based on the detection result from the fuel property detection sensor 11,
In the case of light fuel reduces the fuel injection pressure by the high-pressure pressure regulator 8 to a predetermined value and injectors
Expanding corrected fuel injection pulse width of the data 7, in the case of heavy fuel increases the fuel injection pressure to a predetermined value and injectors
The Rukoto to reduction correction of the fuel injection pulse width of the data 7, light fuel property to be supplied to the injector 7, regardless of the heavy. Thus a certain the vaporization properties of the fuel, combustion characteristics of the engine Can be stabilized. Further, by stabilizing the combustion characteristics of the engine, it can be expected to improve exhaust gas emission, fuel efficiency and running performance.
【００２４】[0024]
【発明の効果】以上説明したように、本発明のエンジン
の燃料供給装置によれば、気化特性制御手段が燃料性状
検出センサの検出結果に基づき、軽質燃料の場合には燃
料噴射圧力制御手段による燃料噴射圧力を所定値まで減
少させかつインジェクタの燃料噴射パルス幅を拡大補正
し、重質燃料の場合には燃料噴射圧力を所定値まで上昇
させかつインジェクタの燃料噴射パルス幅を縮小補正す
ることにより、インジェクタに供給される燃料性状の軽
質、重質に拘らず、燃料の気化特性を一定化するように
したので、エンジンの燃焼特性を安定化することができ
る。また、エンジンの燃焼特性を安定化することによ
り、排ガスエミッション、燃費、走行性能の向上を期待
することができる。As described above, according to the fuel supply system for an engine of the present invention, the vaporization characteristic control means is based on the detection result of the fuel property detection sensor. Reduce the fuel injection pressure to a predetermined value and expand the fuel injection pulse width of the injector.
In the case of heavy fuel, by increasing the fuel injection pressure to a predetermined value and reducing and correcting the fuel injection pulse width of the injector, light and heavy fuel properties supplied to the injector can be obtained. Notwithstanding, since the to constant the vaporization properties of the fuel, it is possible to stabilize the combustion characteristics of the engine. Further, by stabilizing the combustion characteristics of the engine, it is possible to expect improvements in exhaust gas emission, fuel efficiency, and running performance.
【図１】本発明のエンジンの燃料供給装置の一実施例を
示す図である。FIG. 1 is a view showing one embodiment of a fuel supply device for an engine of the present invention.
【図２】燃料の気化特性を一定とするための燃料性状と
燃料圧力との関係を示す線図である。FIG. 2 is a diagram showing a relationship between fuel properties and fuel pressure for keeping fuel vaporization characteristics constant.
【図３】燃料性状に応じた燃料圧力と燃料の気化特性と
の関係を示す線図である。FIG. 3 is a diagram showing a relationship between a fuel pressure according to a fuel property and a fuel vaporization characteristic.
【図４】図１のエンジンの燃料供給装置の動作を説明す
るためのフローチャートである。FIG. 4 is a flowchart illustrating the operation of the fuel supply device for the engine of FIG. 1;
１ 燃料タンク ２ 燃料ポンプ ３ フィルタ ４ 高圧ポンプ ５ 高圧用フィルタ ６ コモンレール ７ インジェクタ ８ 高圧プレッシャ・レギュレータ（燃料噴射圧力制御
手段） ９ ＥＣＵ（エンジン制御ユニット、気化特性制御手
段） １０ 戻り管 １１ 燃料性状検出センサ １４ 圧力センサDESCRIPTION OF SYMBOLS 1 Fuel tank 2 Fuel pump 3 Filter 4 High pressure pump 5 High pressure filter 6 Common rail 7 Injector 8 High pressure pressure regulator (fuel injection pressure control
Means 9 ECU (engine control unit , vaporization characteristic control unit )
Step ) 10 Return pipe 11 Fuel property detection sensor 14 Pressure sensor
フロントページの続き (56)参考文献 特開 平３−18638（ＪＰ，Ａ) 特開 平５−65838（ＪＰ，Ａ) 特開 平４−330344（ＪＰ，Ａ) 特開 平４−175432（ＪＰ，Ａ) 特開 平５−86924（ＪＰ，Ａ) 特開 平４−342845（ＪＰ，Ａ) 特開 昭56−66445（ＪＰ，Ａ) 特開 昭62−284952（ＪＰ，Ａ) 実開 昭62−59740（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F02D 41/04 395 F02D 41/04 380 F02M 69/00 340 Continuation of the front page (56) References JP-A-3-18638 (JP, A) JP-A-5-65838 (JP, A) JP-A-4-330344 (JP, A) JP-A-4-175432 (JP) JP-A-5-86924 (JP, A) JP-A-4-342845 (JP, A) JP-A-56-66445 (JP, A) JP-A-62-284852 (JP, A) 62-59740 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F02D 41/04 395 F02D 41/04 380 F02M 69/00 340
Claims (1)
と、 前記インジェクタに供給される燃料の 燃料性状の軽質及
び重質を検出する燃料性状検出センサと、前記 インジェクタの燃料噴射圧力を制御する燃料噴射圧
力制御手段と、 前記燃料性状検出センサの検出結果に基づき、軽質燃料
の場合には前記燃料噴射圧力制御手段による燃料噴射圧
力を所定値まで減少させかつ前記インジェクタの燃料噴
射パルス幅を拡大補正し、重質燃料の場合には前記燃料
噴射圧力を所定値まで上昇させかつ前記インジェクタの
燃料噴射パルス幅を縮小補正することにより、前記燃料
の気化特性を一定化するように制御する気化特性制御手
段と、 を具備することを特徴とするエンジンの燃料供給装置。1. An injector for supplying fuel to an engine.
If the fuel property detecting sensor for detecting the light and heavy fuel property of fuel supplied to the injector, the fuel injection pressure control means for controlling the fuel injection pressure of the injector, the detection result of the fuel property detecting sensor based-out, in the case of light fuel reduces the fuel injection pressure by the fuel injection pressure control means to a predetermined value and the fuel injection of the injector
The emission pulse width is expanded and corrected, and in the case of heavy fuel, the fuel
The injection pressure is raised to a predetermined value and the injector
The Rukoto to reduction correction of the fuel injection pulse width, before Ki燃 fee fuel supply system for an engine, characterized by comprising a vaporization characteristic control means for controlling to constant the vaporization properties of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15186693A JP3345464B2 (en) | 1993-06-23 | 1993-06-23 | Engine fuel supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15186693A JP3345464B2 (en) | 1993-06-23 | 1993-06-23 | Engine fuel supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0711993A JPH0711993A (en) | 1995-01-13 |
| JP3345464B2 true JP3345464B2 (en) | 2002-11-18 |
Family
ID=15527945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15186693A Expired - Fee Related JP3345464B2 (en) | 1993-06-23 | 1993-06-23 | Engine fuel supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3345464B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8474310B2 (en) | 2008-08-06 | 2013-07-02 | Denso Corporation | Valve freeze control apparatus and sensor element breakage control apparatus for internal combustion engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4315196B2 (en) | 2006-12-21 | 2009-08-19 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| JP4379479B2 (en) * | 2007-02-28 | 2009-12-09 | 株式会社日立製作所 | In-cylinder injection engine control method, control device for implementing the control method, and control circuit device used in the control device |
-
1993
- 1993-06-23 JP JP15186693A patent/JP3345464B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8474310B2 (en) | 2008-08-06 | 2013-07-02 | Denso Corporation | Valve freeze control apparatus and sensor element breakage control apparatus for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0711993A (en) | 1995-01-13 |
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| LAPS | Cancellation because of no payment of annual fees |