JPH0711993A - Fuel feeding device for engine - Google Patents
Fuel feeding device for engineInfo
- Publication number
- JPH0711993A JPH0711993A JP5151866A JP15186693A JPH0711993A JP H0711993 A JPH0711993 A JP H0711993A JP 5151866 A JP5151866 A JP 5151866A JP 15186693 A JP15186693 A JP 15186693A JP H0711993 A JPH0711993 A JP H0711993A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- engine
- pressure
- injector
- heavy
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
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 has a constant vaporization characteristic 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, an in-cylinder direct injection engine is known in which high-pressure fuel is directly injected from an injector into a cylinder. In such a cylinder direct injection engine, so-called stratified combustion is possible in which the atomized fuel injected from the injector to the intake air in a layered manner is ignited and burned, and as a result, a large amount of lean combustion results. Fuel economy 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。Here, the combustion characteristics of the in-cylinder direct injection engine are greatly influenced by the vaporization characteristics of the fuel injected from the injector, and further, the vaporization characteristics of the fuel are light or heavy. That is, the heavy fuel generally has poorer vaporization characteristics than the light fuel.
【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 characteristic of the fuel injected from the injector in response to such a difference in the fuel property has not been developed yet, and a slightly related technique is disclosed in Japanese Patent Laid-Open No. 3-300. 18638, Japanese Utility Model Publication 62
No. 59740, No. 56-66445, No. 62-284952, and the like.
【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 No. 3-18638 is to judge the evaporation characteristic of the fuel, and in the case of a low evaporation fuel, the engine in which the vaporization property and atomization property of the fuel are deteriorated. In the specific operation region of (3), the fuel is further increased to maintain the output performance of the engine.
【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。Further, the technique disclosed in Japanese Utility Model Laid-Open No. 62-59740 detects the temperature of intake air before mixing with fuel in an intake passage of an engine and mixes intake air with fuel after mixing. The temperature of the air is detected, the property of the used fuel is detected based on at least the temperature difference which is the detection result, and the fuel supply amount of the engine is corrected and controlled according to the property of the used fuel.
【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, in the technique disclosed in Japanese Patent Laid-Open No. 56-66445, a heater for heating the fuel is provided in the fuel supply path from the fuel tank to the vaporizer.
The fuel is atomized well to improve combustion efficiency and improve 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。Furthermore, in the technique disclosed in Japanese Patent Laid-Open No. 62-284952, a fuel source for supplying fuel to the engine is provided with a heater having engine cooling water as a heat source in the middle thereof. It is intended 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。By the way, the technique disclosed in Japanese Patent Laid-Open No. 3-18638 or Japanese Utility Model Laid-Open No. 62-59740 can change the amount of fuel supplied by judging the property of the fuel. However, combustion characteristics cannot be maintained. On the other hand, the techniques described in JP-A-56-66445 or JP-A-62-284952 merely show a method for heating fuel, and similarly do 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, in the present technology, for example, when a light fuel is used as a reference, when the heavy fuel is supplied to the injector, the vaporization characteristic of the fuel injected from the injector is deteriorated and the combustion characteristic of the engine becomes unsatisfactory. It becomes stable, and exhaust gas emissions, fuel consumption, running performance, etc. may be reduced.
【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。The present invention has been made in consideration of such a situation, and makes the vaporization characteristic of the fuel injected from the injector constant regardless of whether the fuel property supplied to the injector is light or heavy. Accordingly, it is an object of the present invention 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、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、重質燃料の場合には前記燃料噴射圧力を所定値ま
で上昇させることにより、前記高圧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。To achieve the above object, the present invention provides a fuel property detection sensor for detecting light and heavy fuel properties, and a fuel injection pressure control for controlling the fuel injection pressure of the injector. Means for reducing the fuel injection pressure by the fuel injection pressure control means to a predetermined value in the case of light fuel, and the fuel injection pressure to a predetermined value in the case of heavy fuel. And a vaporization characteristic control means for controlling the vaporization characteristic of the high-pressure fuel so that the vaporization characteristic becomes constant.
【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、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ることにより、高圧燃料
の気化特性を一定化することができる。In the engine fuel supply system of the present invention, the vaporization characteristic control means is based on the detection result of the fuel property detection sensor,
In the case of light fuel, the fuel injection pressure by the fuel injection pressure control means is reduced to a predetermined value, and in the case of heavy fuel, the fuel injection pressure is raised to a predetermined value, so that the vaporization characteristic of the high-pressure fuel is made constant. be able to.
【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 the fuel supply device of the present invention, which is provided with a fuel tank 1. The fuel sucked up by the fuel pump 2 is filtered by the filter 3 and then passed through the low pressure line 12 and the high pressure pump 4
Is supplied to. Here, the fuel property detection sensor 11 arranged in the low pressure line 12 detects light and heavy fuel properties, and outputs the detection results to the ECU 9 as the vaporization characteristic control means which is the engine 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 boosted by the high pressure pump 4 is
After passing through the high-voltage filter 5, the fuel is supplied to the injector 7 via the common rail 6 so that the fuel is directly injected into the cylinder of an 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 fuel injection pressure from the injector 7 is detected by the pressure sensor 14 arranged on the common rail 6, and the detection result is the above-mentioned ECU.
9 is output. The remaining fuel that has not been supplied to the injector 7 is returned to the inside of the fuel tank 1 through 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 feedback-controls 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, generally, when the fuel property is heavy, the vaporization characteristic of the fuel injected from the injector 7 is poor, whereas when it is light, the vaporization characteristic is poor. Is good. Therefore, if the fuel property is heavy, the fuel pressure in the high-pressure pressure regulator 8 is increased, and if the fuel property is light, the fuel pressure is decreased, so that the vaporization characteristic can be maintained at the predetermined value P.
【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 uses 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 property detection sensor 11 and the detection result from the fuel property detection sensor 11 to maintain the vaporization characteristic 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 structure will be described with reference to FIG. First, the injector 7
When the property of the fuel supplied to the fuel is detected by the fuel property detection sensor 11 in the preceding stage of the high-pressure pump 4 (step 401), the ECU 9 determines whether or not the fuel is heavy fuel 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る。なお、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 has its vaporization characteristic raised to a predetermined value by increasing the injection pressure. The ECU 9 reduces and corrects the fuel injection pulse width of the injector 7 so that the fuel injection amount from the injector 7 does not exceed a predetermined value due to the increase in the fuel pressure (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
値まで下げられる。なお、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 fuel, 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 vaporization characteristic lowered to a predetermined value by reducing the injection pressure. The ECU 9 enlarges and corrects the fuel injection pulse width of the injector 7 so that the fuel injection amount from the injector 7 does not fall below a predetermined value due to the decrease in the fuel pressure (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、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、高圧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 this embodiment, the ECU
9 is based on the detection result from the fuel property detection sensor 11,
In the case of light fuel, the fuel injection pressure by the high-pressure pressure regulator 8 is reduced to a predetermined value, and in the case of heavy fuel, the fuel injection pressure is increased to a predetermined value, so that the fuel property supplied to the injector 7 can be controlled. Regardless of whether it is light or heavy, the vaporization characteristic of the high-pressure fuel is made constant, so that the combustion characteristic of the engine can be stabilized.
In addition, by stabilizing the combustion characteristics of the engine, it can be expected to improve exhaust gas emissions, fuel efficiency, and driving 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、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、高圧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, and in the case of light fuel, the fuel injection pressure control means is used. By reducing the fuel injection pressure to a specified value and increasing the fuel injection pressure to a specified value in the case of heavy fuel, the vaporization characteristics of high-pressure fuel regardless of whether the fuel property supplied to the injector is light or heavy The engine combustion characteristics can be stabilized because the engine is kept constant. Further, by stabilizing the combustion characteristics of the engine, improvement of exhaust gas emission, fuel consumption, and running performance can be expected.
【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 diagram showing an embodiment of an engine fuel supply apparatus 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 a fuel property and a fuel pressure for keeping a fuel vaporization characteristic 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 fuel pressure and fuel vaporization characteristics according to fuel properties.
【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。4 is a flow chart for explaining the operation of the fuel supply system for the engine of FIG. 1. FIG.
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 ９ ＥＣＵ（エンジン制御ユニット） １０ 戻り管 １１ 燃料性状検出センサ １４ 圧力センサ 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 9 ECU (Engine Control Unit) 10 Return Pipe 11 Fuel Property Detection Sensor 14 Pressure Sensor
Claims (1)
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、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ることにより、前記高圧
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. A fuel property detection sensor for detecting light and heavy fuel properties, fuel injection pressure control means for controlling a fuel injection pressure of the injector, and a light fuel based on a detection result of the fuel property detection sensor. In the case of, the fuel injection pressure by the fuel injection pressure control means is decreased to a predetermined value, and in the case of heavy fuel, the fuel injection pressure is increased to a predetermined value, so that the vaporization characteristic of the high-pressure fuel is made constant. A fuel supply device for an engine, comprising:
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 true JPH0711993A (en) | 1995-01-13 |
| JP3345464B2 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008078162A2 (en) * | 2006-12-21 | 2008-07-03 | Toyota Jidosha Kabushiki Kaisha | Control device and control method for internal combustion engine |
| EP1965062A2 (en) * | 2007-02-28 | 2008-09-03 | Hitachi, Ltd. | Control method of direct injection engine, controller for implementing the control method, and control circuit device used for the controller |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010038053A (en) | 2008-08-06 | 2010-02-18 | Denso Corp | Valve antifreeze device and sensor element failure suppressing device of internal combustion engine |
-
1993
- 1993-06-23 JP JP15186693A patent/JP3345464B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008078162A2 (en) * | 2006-12-21 | 2008-07-03 | Toyota Jidosha Kabushiki Kaisha | Control device and control method for internal combustion engine |
| WO2008078162A3 (en) * | 2006-12-21 | 2008-08-28 | Toyota Motor Co Ltd | Control device and control method for internal combustion engine |
| US7962275B2 (en) | 2006-12-21 | 2011-06-14 | Toyota Jidosha Kabushiki Kaisha | Control device and control method for internal combustion engine |
| EP1965062A2 (en) * | 2007-02-28 | 2008-09-03 | Hitachi, Ltd. | Control method of direct injection engine, controller for implementing the control method, and control circuit device used for the controller |
| EP1965062A3 (en) * | 2007-02-28 | 2014-07-16 | Hitachi, Ltd. | Control method of direct injection engine, controller for implementing the control method, and control circuit device used for the controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3345464B2 (en) | 2002-11-18 |
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