JPH11210540A - Fuel feeder for internal combustion engine - Google Patents
Fuel feeder for internal combustion engineInfo
- Publication number
- JPH11210540A JPH11210540A JP10012912A JP1291298A JPH11210540A JP H11210540 A JPH11210540 A JP H11210540A JP 10012912 A JP10012912 A JP 10012912A JP 1291298 A JP1291298 A JP 1291298A JP H11210540 A JPH11210540 A JP H11210540A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- low
- pressure
- pressure pump
- internal combustion
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、内燃機関として
筒内噴射火花点火型の内燃機関に適用される燃料供給装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply device applied to a direct injection spark ignition type internal combustion engine as an internal combustion engine.
【０００２】[0002]
【関連する背景技術】筒内噴射型火花点火型の内燃機関
（以下、直噴エンジンと称する）は、ガソリン燃料を燃
料噴射弁から燃焼室内に直接に噴射するようにしたもの
であり、特に燃料を圧縮行程の終期に噴出することで、
たとえ混合気全体が非常にリーンであっても、その混合
気への着火が可能となり、ＣＯ2及び燃費に関し、これ
らの大幅な低減が可能となる。2. Related Background Art A direct injection type spark ignition type internal combustion engine (hereinafter referred to as a direct injection engine) is designed to directly inject gasoline fuel from a fuel injection valve into a combustion chamber. At the end of the compression stroke,
Even whole mixture is very lean, the mixture igniting an air-fuel enables relates CO 2 and fuel consumption, it becomes possible to these significant reduction.
【０００３】この種の直噴エンジンは上述したように燃
焼室内の圧力が非常に高くなる圧縮行程の後期にて燃料
噴射を行うため、燃料噴射弁には高圧の燃料を供給しな
ければならない。具体的には、直噴エンジンの燃料供給
装置は例えば特開平8-177663号公報に開示されているよ
うに、燃料タンク内の燃料を燃料噴射弁に向けて吐出す
る電動型の低圧ポンプに加え、この低圧ポンプからの燃
料を更に加圧して燃料噴射弁に供給する高圧ポンプを備
えている。[0003] As described above, this type of direct injection engine injects fuel in the latter stage of the compression stroke when the pressure in the combustion chamber becomes extremely high. Therefore, high-pressure fuel must be supplied to the fuel injection valve. Specifically, a fuel supply device for a direct injection engine is added to an electric low-pressure pump that discharges fuel in a fuel tank toward a fuel injection valve, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-177663. And a high-pressure pump for further pressurizing the fuel from the low-pressure pump and supplying the fuel to the fuel injection valve.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述した高
圧ポンプは直噴エンジンのカムシャフトにより駆動され
るため、その高圧燃料の吐出量はエンジン回転数の上昇
に伴い増加するものの、低圧ポンプは電動型であるた
め、エンジン回転数に拘わらず、その低圧燃料の吐出量
は一定である。Since the above-described high-pressure pump is driven by the camshaft of the direct injection engine, the discharge amount of the high-pressure fuel increases as the engine speed increases. Because of the type, the discharge amount of the low-pressure fuel is constant regardless of the engine speed.
【０００５】このため、低圧ポンプの吐出量は、直噴エ
ンジンの許容最高回転数時における高圧ポンプの最大吐
出量よりも十分に余裕をもって多くなければならない。
つまり、低圧ポンプはその供給電圧の降下に伴い、その
吐出量が低下するため、供給電圧の低下を考慮した上
で、その吐出量を設定しておく必要がある。更に詳しく
は、高圧ポンプの吐出量に対し低圧ポンプの吐出量が不
足すると、高圧ポンプが規定の高圧燃料を燃焼噴射弁に
向けて供給できなくなる事態も考えられ、このような事
態に至ると、燃料噴射弁は内燃機関の要求する燃料噴射
量を噴射できない虞がある。この場合、燃焼室に供給さ
れる混合気が不所望にリーンとなり、燃焼室の過熱から
ノッキングを招いたり、ＮＯxの排出量を増加させてし
まう。For this reason, the discharge amount of the low-pressure pump must be sufficiently larger than the maximum discharge amount of the high-pressure pump at the maximum allowable rotation speed of the direct injection engine.
In other words, the discharge amount of the low-pressure pump decreases as the supply voltage decreases. Therefore, it is necessary to set the discharge amount in consideration of the decrease in the supply voltage. More specifically, when the discharge amount of the low-pressure pump is insufficient with respect to the discharge amount of the high-pressure pump, a situation in which the high-pressure pump cannot supply the specified high-pressure fuel to the combustion injection valve may be considered. The fuel injector may not be able to inject the fuel injection amount required by the internal combustion engine. In this case, the air-fuel mixture supplied to the combustion chamber becomes undesirably lean, causing knocking due to overheating of the combustion chamber and increasing the emission amount of NOx.
【０００６】しかしながら、上述したような大吐出量の
低圧ポンプは、そのサイズ、重量及び消費電力の全てが
増加し、車両への搭載には不利となる。この発明は上述
の事情に基づいてなされたもので、その目的とするとこ
ろは、その吐出量に不足を生じさせることなく、可能な
限り小型の電動型低圧ポンプを使用することができる内
燃機関の燃料供給装置を提供することにある。[0006] However, the above-described large-discharge low-pressure pump increases in size, weight and power consumption, and is disadvantageous for mounting on a vehicle. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an internal combustion engine which can use an electric low-pressure pump as small as possible without causing a shortage in the discharge amount. It is to provide a fuel supply device.
【０００７】[0007]
【課題を解決するための手段】上記の目的はこの発明に
よって達成され、請求項１の内燃機関の燃料供給装置
は、低圧ポンプの供給電圧が所定レベル以下に降下した
とき、内燃機関の回転数の上限値を低下させる制御手段
を備えている。請求項１の燃料供給装置によれば、低圧
ポンプの供給電圧が降下すると、この場合、制御手段は
内燃機関の回転数、即ち、高圧ポンプの最大吐出量を制
限し、低圧ポンプの吐出量に不足を生じるさせることは
ない。SUMMARY OF THE INVENTION The above object is achieved by the present invention, and a fuel supply system for an internal combustion engine according to the present invention is configured such that when the supply voltage of a low-pressure pump falls below a predetermined level, the rotation speed of the internal combustion engine is reduced. Control means for lowering the upper limit value of. According to the fuel supply device of the first aspect, when the supply voltage of the low-pressure pump drops, in this case, the control means limits the rotation speed of the internal combustion engine, that is, the maximum discharge amount of the high-pressure pump, and reduces the discharge amount of the low-pressure pump. There is no shortage.
【０００８】例えば、制御手段は燃料噴射弁からの燃料
の噴射を中断する燃料カットの実施、或いは、スロット
ルバルブの開度を制限することにより、内燃機関におけ
る回転数の上昇を抑制する。[0008] For example, the control means suppresses an increase in the rotational speed of the internal combustion engine by executing a fuel cut for interrupting the injection of fuel from the fuel injection valve or limiting the opening of the throttle valve.
【０００９】[0009]
【発明の実施の形態】図１を参照すると、筒内噴射火花
点火型の内燃機関の燃料供給装置は、ガソリン燃料を蓄
えた燃料タンク２を備え、この燃料タンク２内には低圧
ポンプ４が収容されている。低圧ポンプ４は電動型ポン
プであり、バッテリ６から電子制御ユニット（ＥＣＵ）
８を介し供給電圧を受けることにより駆動される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a fuel supply system for a direct injection spark ignition type internal combustion engine includes a fuel tank 2 storing gasoline fuel, in which a low pressure pump 4 is provided. Is housed. The low-pressure pump 4 is an electric pump, and is supplied from a battery 6 to an electronic control unit (ECU).
It is driven by receiving a supply voltage via the same.
【００１０】低圧ポンプ４の吐出口には吐出管路９の一
端が接続されており、この吐出管路９の他端側は燃料タ
ンク２を貫通し、この燃料タンク２の外側に延びてい
る。吐出管路９の他端には低圧レギュレータ１２の入口
が接続されており、この低圧レギュレータ１２の出口に
は低圧燃料管路１０の一端が延びている。低圧レギュレ
ータ１２は、低圧ポンプ４から吐出された燃料の圧力、
即ち、燃圧を所定の低燃圧値ＰH（低リリーフ圧：例え
ば０．３３Ｍｐａ）に規制し、その低圧燃料を低圧燃料
管路１０に供給する。それ故、低圧レギュレータ１２の
リリーフ口からはリリーフ管路１４が延びており、この
リリーフ管路１４は燃料タンク２に接続されている。One end of a discharge pipe 9 is connected to the discharge port of the low-pressure pump 4, and the other end of the discharge pipe 9 penetrates the fuel tank 2 and extends outside the fuel tank 2. . The other end of the discharge pipe 9 is connected to an inlet of a low-pressure regulator 12, and one end of the low-pressure fuel pipe 10 extends to an outlet of the low-pressure regulator 12. The low-pressure regulator 12 controls the pressure of the fuel discharged from the low-pressure pump 4,
That is, the fuel pressure is regulated to a predetermined low fuel pressure value PH (low relief pressure: for example, 0.33 Mpa), and the low-pressure fuel is supplied to the low-pressure fuel line 10. Therefore, a relief pipe 14 extends from the relief port of the low-pressure regulator 12, and the relief pipe 14 is connected to the fuel tank 2.
【００１１】低圧燃料管路１０の他端には高圧ポンプ１
６の吸い込み口が接続されており、この高圧ポンプ１６
の吐出口からは高圧燃料管路１８が延びている。この高
圧燃料管路１８の他端は高圧レギュレータ２０の入口に
接続されている。高圧ポンプ１６はそのポンプ軸が内燃
機関のカムシャフトにより連結され、内燃機関により駆
動される。従って、高圧ポンプ１６は、低圧燃料管路１
０からの低圧燃料の供給を受け、その低圧燃料を更に加
圧して高圧燃料管路１８内に吐出し、その高圧燃料の吐
出量は内燃機関の回転数が上昇するに連れて増加する。The other end of the low-pressure fuel line 10 has a high-pressure pump 1
6 is connected to the high pressure pump 16
A high-pressure fuel line 18 extends from the discharge port. The other end of the high-pressure fuel line 18 is connected to an inlet of a high-pressure regulator 20. The high-pressure pump 16 has its pump shaft connected by a camshaft of the internal combustion engine, and is driven by the internal combustion engine. Therefore, the high-pressure pump 16 is connected to the low-pressure fuel line 1.
When the low-pressure fuel is supplied from 0, the low-pressure fuel is further pressurized and discharged into the high-pressure fuel line 18, and the discharge amount of the high-pressure fuel increases as the rotational speed of the internal combustion engine increases.
【００１２】高圧レギュレータ２０は高圧燃料管路１８
内の燃圧を前述した低燃圧値よりも十分に高い燃圧値、
即ち、高燃圧値（高リリーフ圧：例えば５Ｍｐａ）に規
制し、高圧レギュレータ２０から延びるリリーフ管路２
２は燃料タンク２に接続されている。高圧燃料管路１８
には複数の燃料噴射弁２４が接続されており、各燃料噴
射弁２４は対応する気筒の燃焼室に臨んで配置されてい
る。各燃料噴射弁２４はＥＣＵ８に電気的に接続されて
おり、それらの開閉作動、即ち、その燃料の噴射量は内
燃機関の運転状況に応じ、ＥＣＵ８により制御される。The high pressure regulator 20 is connected to the high pressure fuel line 18
The fuel pressure within the fuel pressure value sufficiently higher than the low fuel pressure value described above,
That is, the relief pipe line 2 is regulated to a high fuel pressure value (high relief pressure: for example, 5 Mpa) and extends from the high pressure regulator 20.
2 is connected to the fuel tank 2. High pressure fuel line 18
Are connected to a plurality of fuel injection valves 24, and each fuel injection valve 24 is disposed facing a combustion chamber of a corresponding cylinder. Each fuel injection valve 24 is electrically connected to the ECU 8, and the opening / closing operation thereof, that is, the fuel injection amount is controlled by the ECU 8 according to the operation state of the internal combustion engine.
【００１３】ＥＣＵ８には前述した燃料噴射弁２４に加
えて、バルブ駆動モータ２６が電気的に接続されてお
り、このバルブ駆動モータ２６は内燃機関のスロットル
バルブ２８を開閉駆動する。スロットルバルブ２８、即
ち、バルブ駆動モータ２６の作動を制御するため、ＥＣ
Ｕ８には、アクセルペダルの踏み込み量を検出するアク
セル開度センサ３０もまた電気的に接続されている。A valve drive motor 26 is electrically connected to the ECU 8 in addition to the above-described fuel injection valve 24. The valve drive motor 26 opens and closes a throttle valve 28 of the internal combustion engine. In order to control the operation of the throttle valve 28, that is, the valve drive motor 26, EC
An accelerator opening sensor 30 for detecting the depression amount of the accelerator pedal is also electrically connected to U8.
【００１４】更にＥＣＵ８には、低圧燃料管路１０内及
び高圧燃料管路１８内の燃圧をそれぞれ検出する燃圧セ
ンサ３２，３４、内燃機関におけるクランク角を検出す
るクランク角センサ３６等が電気的に接続されており、
ＥＣＵ８は低圧ポンプ４への供給電圧を検知する機能、
即ち、電圧検知部３８もを有している。次に、ＥＣＵ８
にて実行される燃料供給装置の作動制御に関し、図２を
参照しながら説明する。Further, the ECU 8 electrically includes fuel pressure sensors 32 and 34 for detecting the fuel pressure in the low-pressure fuel line 10 and the fuel pressure in the high-pressure fuel line 18 and a crank angle sensor 36 for detecting a crank angle in the internal combustion engine. Connected
The ECU 8 has a function of detecting a supply voltage to the low-pressure pump 4,
That is, the voltage detection unit 38 is also provided. Next, the ECU 8
The operation control of the fuel supply device, which is performed in the above, will be described with reference to FIG.
【００１５】先ず、内燃機関が始動されると、高圧燃料
管路１８内の燃圧が規定の高燃圧値に達したか否かが判
別される（ステップＳ１）。ここでの判別は、燃圧セン
サ３４からのセンサ信号に基づき、ＥＣＵ８内にて実施
される。なお、ステップＳ１の判別結果が偽（No）の場
合にはその判別が繰り返して実施される。ステップＳ１
の判別結果か真（Yes）になると、ＥＣＵ８はその電圧
検知部３８にて低圧ポンプ４の供給電圧が規定レベルよ
り所定値以上に降下したか否かを判別する（ステップＳ
２）。ここでの判別結果が偽(No)の場合、ＥＣＵ８は内
燃機関の回転数、つまり、エンジン回転数を通常時の上
限値（例えば、６５００rpm程度）に維持し（ステップ
Ｓ３）、ステップＳ１以降のステップを繰り返して実施
する。First, when the internal combustion engine is started, it is determined whether the fuel pressure in the high-pressure fuel line 18 has reached a predetermined high fuel pressure value (step S1). The determination here is performed in the ECU 8 based on a sensor signal from the fuel pressure sensor 34. If the result of the determination in step S1 is false (No), the determination is repeated. Step S1
If the determination result is true (Yes), the ECU 8 determines whether or not the supply voltage of the low-pressure pump 4 has dropped below a predetermined level by a voltage detector 38 (step S).
2). If the determination result is false (No), the ECU 8 maintains the rotation speed of the internal combustion engine, that is, the engine rotation speed at the normal upper limit value (for example, about 6500 rpm) (step S3), and after step S1. Repeat the steps.
【００１６】これに対し、ステップＳ２の判別結果が真
の場合、つまり、供給電圧の降下に伴い低圧ポンプ４の
吐出量が低下するような状況にあるとき、ＥＣＵ８は、
内燃機関のエンジン回転数の上限値を例えば３０００rp
m程度にまで低下させた後（ステップＳ４）、ステップ
Ｓ１以降のステップを繰り返して実施する。このように
してエンジン回転数の上限値が低下されると、高圧ポン
プ１６の回転数、即ち、その高圧燃料の吐出量もまたそ
れ以上に増加することはなく、高圧ポンプ１６の吐出量
に対し、低圧ポンプ４の吐出量が不足することはない。On the other hand, when the result of the determination in step S2 is true, that is, when the discharge amount of the low-pressure pump 4 decreases with a decrease in the supply voltage, the ECU 8
The upper limit of the engine speed of the internal combustion engine is, for example, 3000 rp.
After it is reduced to about m (step S4), the steps after step S1 are repeatedly performed. When the upper limit of the engine speed is reduced in this way, the speed of the high-pressure pump 16, that is, the discharge amount of the high-pressure fuel does not increase any more, and the discharge amount of the high-pressure pump 16 does not increase. In addition, the discharge amount of the low-pressure pump 4 does not run short.
【００１７】即ち、低圧ポンプ４の吐出量は、図３中実
線Ｄで示す高圧ポンプ１６の吐出特性でみて、その最大
吐出量に一致した１点鎖線の吐出量Ｆを有していればよ
く、その小型化及び軽量化を最大限に図ることができ、
その低消費電力化及び低コスト化にも大きく寄与する。
ステップＳ４の実施にあたり具体的には、ＥＣＵ８は、
クランク角センサ３６からのセンサ信号に基づきエンジ
ン回転数を３０００rpmに制限すべく、燃料噴射弁２４
からの燃料噴射の中止、即ち、燃料カットを実施する
か、または、アクセルペダルの踏み込み量に拘わらず、
スロットルバルブ２８の許容最大開度を例えばその全開
の３０％程度に制限する。このようなスロットルバルブ
２８の開度制限は燃料カットの実施に比べ、内燃機関の
加減速ショックを低減することができる。That is, the discharge amount of the low-pressure pump 4 only needs to have a discharge amount F indicated by a one-dot chain line corresponding to the maximum discharge amount in view of the discharge characteristics of the high-pressure pump 16 shown by a solid line D in FIG. , To maximize its size and weight,
This greatly contributes to lower power consumption and lower cost.
Specifically, in performing step S4, the ECU 8
In order to limit the engine speed to 3000 rpm based on the sensor signal from the crank angle sensor 36, the fuel injection valve 24
Stop fuel injection from, that is, to execute the fuel cut, or regardless of the amount of depression of the accelerator pedal,
The allowable maximum opening of the throttle valve 28 is limited to, for example, about 30% of its full opening. Such restriction of the opening degree of the throttle valve 28 can reduce the acceleration / deceleration shock of the internal combustion engine as compared with the execution of the fuel cut.
【００１８】この発明は上述の実施例に制約されるもの
ではない。例えば低圧ポンプ４の供給電圧降下に起因す
る吐出量の低下に応じ、エンジン回転数における上限値
の低下量を制御するようにしてもよい。The present invention is not limited to the above embodiment. For example, the amount of decrease in the upper limit value of the engine speed may be controlled in accordance with the decrease in the discharge amount due to the decrease in the supply voltage of the low-pressure pump 4.
【００１９】[0019]
【発明の効果】以上説明したように請求項１の内燃機関
の燃料供給装置によれば、低圧ポンプの供給電圧の降下
に伴い、内燃機関における回転数の上限値を低下させる
ようにしたので、低圧ポンプの吐出量不足を招くことな
く、低圧ポンプに小型且つ軽量の電動ポンプを使用で
き、その低消費電力化及び低コストをも同時に図ること
ができる。As described above, according to the fuel supply system for an internal combustion engine of the first aspect, the upper limit of the number of revolutions of the internal combustion engine is reduced as the supply voltage of the low-pressure pump drops. A small and lightweight electric pump can be used for the low-pressure pump without insufficiency of the discharge amount of the low-pressure pump, and low power consumption and low cost can be achieved at the same time.
【図１】一実施例の燃料供給装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a fuel supply device of one embodiment.
【図２】燃料供給装置の制御ルーチンを示したフローチ
ャートである。FIG. 2 is a flowchart showing a control routine of a fuel supply device.
【図３】エンジン回転数に対する高圧ポンプの吐出量
と、低圧ポンプの吐出量との関係を示したグラフであ
る。FIG. 3 is a graph showing a relationship between a discharge amount of a high-pressure pump and a discharge amount of a low-pressure pump with respect to an engine speed.
４ 低圧ポンプ ８ ＥＣＵ １２ 低圧レギュレータ １６ 高圧ポンプ ２０ 高圧レギュレータ ２６ バルブ駆動モータ ２８ スロットルバルブ ３０ アクセル開度センサ 4 Low-pressure pump 8 ECU 12 Low-pressure regulator 16 High-pressure pump 20 High-pressure regulator 26 Valve drive motor 28 Throttle valve 30 Accelerator opening sensor
Claims (1)
低圧ポンプと、 前記低圧ポンプから吐出された燃料を所定の低燃圧値に
規制して出力する低圧レギュレータと、 内燃機関により駆動され、前記低圧レギュレータから出
力された燃料を加圧し、燃料噴射弁に向けて吐出する高
圧ポンプと、 前記燃料噴射弁に供給される燃圧を前記低燃圧値よりも
高い高燃圧値に規制する高圧レギュレータと、 前記低圧ポンプの供給電圧が所定レベル以下に低下した
とき、内燃機関の回転数の上限値を低下させる制御手段
とを具備したことを特徴とする内燃機関の燃料供給装
置。1. An electric low-pressure pump for discharging fuel in a fuel tank, a low-pressure regulator for restricting and outputting fuel discharged from the low-pressure pump to a predetermined low fuel pressure value, and being driven by an internal combustion engine, A high-pressure pump that pressurizes the fuel output from the low-pressure regulator and discharges the fuel toward a fuel injection valve, and a high-pressure regulator that regulates the fuel pressure supplied to the fuel injection valve to a high fuel pressure value higher than the low fuel pressure value. A fuel supply device for an internal combustion engine, comprising: control means for lowering an upper limit value of a rotation speed of the internal combustion engine when a supply voltage of the low-pressure pump falls below a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10012912A JPH11210540A (en) | 1998-01-26 | 1998-01-26 | Fuel feeder for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10012912A JPH11210540A (en) | 1998-01-26 | 1998-01-26 | Fuel feeder for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11210540A true JPH11210540A (en) | 1999-08-03 |
Family
ID=11818573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10012912A Withdrawn JPH11210540A (en) | 1998-01-26 | 1998-01-26 | Fuel feeder for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11210540A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014066231A (en) * | 2012-09-27 | 2014-04-17 | Isuzu Motors Ltd | Supply system for liquefied gas fuel, and supply method for liquefied gas fuel |
| WO2016189803A1 (en) * | 2015-05-26 | 2016-12-01 | 株式会社デンソー | Internal-combustion engine high-pressure pump control device |
-
1998
- 1998-01-26 JP JP10012912A patent/JPH11210540A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014066231A (en) * | 2012-09-27 | 2014-04-17 | Isuzu Motors Ltd | Supply system for liquefied gas fuel, and supply method for liquefied gas fuel |
| WO2016189803A1 (en) * | 2015-05-26 | 2016-12-01 | 株式会社デンソー | Internal-combustion engine high-pressure pump control device |
| JP2016217324A (en) * | 2015-05-26 | 2016-12-22 | 株式会社デンソー | High-pressure pump control device of internal combustion engine |
| US10273885B2 (en) | 2015-05-26 | 2019-04-30 | Denso Corporation | High-pressure pump control device for internal-combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050405 |