JPH09195882A - Fuel injection device with booster device - Google Patents
Fuel injection device with booster deviceInfo
- Publication number
- JPH09195882A JPH09195882A JP469596A JP469596A JPH09195882A JP H09195882 A JPH09195882 A JP H09195882A JP 469596 A JP469596 A JP 469596A JP 469596 A JP469596 A JP 469596A JP H09195882 A JPH09195882 A JP H09195882A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- oil
- pressure
- fuel injection
- bore part
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は増圧装置を備えたデ
ィーゼル機関用燃料噴射装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device for a diesel engine equipped with a pressure booster.
【０００２】[0002]
【従来の技術】図には、ジャーク式燃料噴射装置の１例
が示されている。図２において、５１は燃料噴射ポン
プ、６０は燃料噴射弁、４は上記燃料噴射ポンプ５１と
燃料噴射弁６０とを接続する噴射管、５は燃料タンクで
ある。2. Description of the Related Art An example of a jerk type fuel injection device is shown in the drawing. In FIG. 2, 51 is a fuel injection pump, 60 is a fuel injection valve, 4 is an injection pipe connecting the fuel injection pump 51 and the fuel injection valve 60, and 5 is a fuel tank.
【０００３】かかる燃料噴射装置において、機関のクラ
ンク軸に連動される燃料カムによってプランジャバレル
２内を往復せしめられるプランジャ１の頭部がプランジ
ャバレル２の給排油孔１２を閉じると、燃料タンク５か
ら供給されたプランジャ室２ｂ内の燃料は高圧に加圧さ
れて逆止弁３を押し開き、噴射管４を通り、燃料噴射弁
６０の燃料通路９を経て燃料溜１３に入り、針弁ばね１
０のばね力により閉じられている針弁７を押し上げ、噴
孔８からシリンダ内に噴射される。In such a fuel injection device, when the head of the plunger 1 which is reciprocated in the plunger barrel 2 by the fuel cam interlocked with the crankshaft of the engine closes the oil supply / drain hole 12 of the plunger barrel 2, the fuel tank 5 is opened. The fuel supplied from the inside of the plunger chamber 2b is pressurized to a high pressure to push open the check valve 3, passes through the injection pipe 4, enters the fuel reservoir 13 through the fuel passage 9 of the fuel injection valve 60, and the needle valve spring 1
The needle valve 7, which is closed by the spring force of 0, is pushed up and is injected from the injection hole 8 into the cylinder.
【０００４】そしてプランジャ１の下部リード１１が給
排油孔１２にかかるとプランジャ室２ｂと給排油孔１２
とが連通して排油が行われ、噴射が終了する。６はノズ
ル本体である。When the lower lead 11 of the plunger 1 comes into contact with the oil supply / drain hole 12, the plunger chamber 2b and the oil supply / drain hole 12 are engaged.
And are communicated with each other, the oil is drained, and the injection ends. 6 is a nozzle body.
【０００５】[0005]
【発明が解決しようとする課題】近年、大型ディーゼル
機関や高速ディーゼル機関においては、機関の高出力化
を図るため、燃料噴射系の高圧化、つまり燃料噴射ポン
プ５０から吐出される燃料の圧力を最大限に上昇せしめ
ることが要求されている。In recent years, in a large diesel engine or a high speed diesel engine, in order to increase the output of the engine, the pressure of the fuel injection system is increased, that is, the pressure of the fuel discharged from the fuel injection pump 50 is increased. It is required to raise it to the maximum.
【０００６】然るに図２に示されるような従来の燃料噴
射系にあっては、燃料噴射ポンプ５１の噴射圧力を上昇
せしめると、燃料の高温化による粘土低下によりプラン
ジャ１の外周とプランジャバレル２の内周との間の微小
隙間や、燃料噴射ポンプ５１と燃料噴射弁６０との間の
燃料通路の接続部からの燃料漏れが増加する。殊に粗悪
油や乳化油等の取扱性が良好でない燃料を使用する際に
は、噴射性能の悪化が顕著となる。However, in the conventional fuel injection system as shown in FIG. 2, when the injection pressure of the fuel injection pump 51 is increased, the temperature of the fuel rises and the clay lowers, causing the outer periphery of the plunger 1 and the plunger barrel 2. Fuel leakage from the minute gap between the inner circumference and the fuel passage connecting portion between the fuel injection pump 51 and the fuel injection valve 60 increases. In particular, when a fuel such as crude oil or emulsified oil that does not have good handleability is used, the injection performance is significantly deteriorated.
【０００７】本発明の目的は、燃料噴射系からの燃料の
漏洩を抑制しつつ燃料の高圧噴射をなし得、エンジンの
高出力化に対応可能で、かつ粗悪油等の使用も容易な燃
料噴射装置を提供することにある。The object of the present invention is to perform fuel injection at high pressure while suppressing leakage of fuel from the fuel injection system, to cope with higher engine output, and to easily use crude oil or the like. To provide a device.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記問題点を
解決するもので、その要旨とする手段は、燃料噴射弁の
針弁を燃料溜内の燃料圧力により開弁してシリンダ内に
燃料を噴射する燃料噴射装置において、機油の回転に連
動されて作動油を加圧する加圧ポンプを設けるととも
に、上記加圧ポンプからの作動油が導入される大油室
と、上記燃料溜に連通される小油室と、上記大油室に臨
み同大油室内の作動油が作用する大径部及び上記小油室
に臨む小径部を有し、同大径部と小径部との面積比で上
記小油室から燃料溜に至る燃料油路内の燃料を増圧する
増圧ピストンとを備えた増圧装置を設け、上記加圧ポン
プと増圧装置の大油室と作動油タンクとを接続する作動
油の循環路を、上記燃料噴射弁の燃料油路とは別個に設
けたことを特徴とする増圧装置付き燃料噴射装置にあ
る。SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and the gist of the invention is to open a needle valve of a fuel injection valve by the fuel pressure in a fuel reservoir so that it is installed in a cylinder. In a fuel injection device for injecting fuel, a pressure pump that pressurizes the working oil in association with the rotation of the machine oil is provided, and the large oil chamber into which the working oil from the pressure pump is introduced and the fuel reservoir communicate with each other. The small oil chamber has a large diameter portion facing the large oil chamber and the working oil in the large oil chamber acts, and a small diameter portion facing the small oil chamber, and the area ratio of the large diameter portion and the small diameter portion. With a pressure booster equipped with a pressure boosting piston for boosting the pressure of the fuel in the fuel oil passage from the small oil chamber to the fuel reservoir, the pressure pump, the large oil chamber of the pressure booster and the hydraulic oil tank are connected. A circulation path for hydraulic oil to be connected is provided separately from the fuel oil path of the fuel injection valve. In with pressure device fuel injection system.
【０００９】上記手段によれば、加圧ポンプのプランジ
ャが上昇し作動油が加圧されると作動油供給管路の逆止
弁は閉じ、増圧ピストンの大径部に作動油圧が作用し増
圧ピストンが下降する。これにより、小油室の燃料が増
圧ピストンの大径部と小径部との面積比により加圧され
高圧となり、燃料供給ラインの逆止弁が閉じられ、燃料
溜内の圧力が上がり、この圧力により針弁が針弁ばね力
に打ち勝ちリフトして、燃料が噴孔からシリンダ内に噴
射される。According to the above means, when the plunger of the pressurizing pump rises and the working oil is pressurized, the check valve in the working oil supply line is closed, and the working oil pressure acts on the large diameter portion of the pressure boosting piston. Booster piston moves down. As a result, the fuel in the small oil chamber is pressurized to a high pressure by the area ratio of the large diameter portion and the small diameter portion of the booster piston, the check valve of the fuel supply line is closed, and the pressure in the fuel reservoir rises. The pressure causes the needle valve to overcome the needle valve spring force and lift, so that fuel is injected from the injection hole into the cylinder.
【００１０】加圧ポンプのプランジャがさらに上昇し給
排油孔が開くと、上記増圧ピストンに作用していた高圧
作動油が作動油タンクへ抜けることにより、圧力が下が
る。これにより、増圧ピストンによって加圧されていた
燃料油圧力も下がって針弁が閉じ噴射を終了する。その
後逆止弁を介して作動油タンクの作動油が加圧ポンプと
増圧装置との間を循環する。When the plunger of the pressurizing pump further rises to open the oil supply / drain hole, the high pressure hydraulic oil acting on the pressure boosting piston escapes to the hydraulic oil tank, and the pressure drops. As a result, the fuel oil pressure that has been pressurized by the pressure boosting piston also drops, the needle valve closes, and injection ends. Then, the hydraulic oil in the hydraulic oil tank circulates between the pressurizing pump and the pressure booster via the check valve.
【００１１】これにより、加圧ポンプの吐出圧力を大き
くすることなく、増圧装置による増圧作用によって所要
の高い噴射圧力が得られる。また噴射期間以外は作動油
が加圧ポンプと増圧装置との間を循環しているので、作
動油の滞留による圧力上昇やこれに伴なう温度上昇が抑
制され、作動油の漏れの発生も回避される。As a result, the required high injection pressure can be obtained by the pressure increasing function of the pressure increasing device without increasing the discharge pressure of the pressurizing pump. In addition, since the hydraulic oil circulates between the pressurizing pump and the pressure booster except during the injection period, the pressure rise due to the accumulation of hydraulic oil and the accompanying temperature rise are suppressed, and the leakage of hydraulic oil occurs. Is also avoided.
【００１２】[0012]
【発明の実施の形態】以下図１を参照して本発明の実施
形態につき詳細に説明する。図１には本発明の実施形態
に係るディーゼル機関用燃料噴射装置の構成図が示され
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIG. FIG. 1 shows a configuration diagram of a fuel injection device for a diesel engine according to an embodiment of the present invention.
【００１３】図１において、７０は加圧ポンプであり、
同加圧ポンプ７０は図２に示されるジャーク式の燃料噴
射ポンプ５０と同一構造である。即ち１は機関のクラン
ク軸に連動されて回転する燃料カム（図示せず）により
プランジャバレル２内を往復動せしめられるプランジ
ャ、１２は給排油孔、２ｂはプランジャ室である。In FIG. 1, 70 is a pressurizing pump,
The pressurizing pump 70 has the same structure as the jerk type fuel injection pump 50 shown in FIG. That is, 1 is a plunger that is reciprocally moved in the plunger barrel 2 by a fuel cam (not shown) that rotates in conjunction with the crankshaft of the engine, 12 is an oil supply / drain hole, and 2b is a plunger chamber.
【００１４】６０は燃料噴射弁であり、これは図３に示
される従来の燃料噴射弁６０と略同一構成であり、６は
ノズル本体、８は噴孔、７は同ノズル本体６内に往復摺
動自在に嵌合された針弁、９は燃料通路、１３は燃料溜
である。Reference numeral 60 denotes a fuel injection valve, which has substantially the same structure as the conventional fuel injection valve 60 shown in FIG. 3, 6 is a nozzle body, 8 is an injection hole, and 7 is a reciprocating member in the nozzle body 6. A needle valve slidably fitted, a fuel passage 9 and a fuel reservoir 13.
【００１５】１００は上記燃料噴射弁６０の上部に設け
られた増圧装置であり、同増圧装置１００のハウジング
１０５が上記燃料噴射弁６０のノズル本体６上に固着さ
れている。Reference numeral 100 denotes a pressure booster provided above the fuel injection valve 60, and a housing 105 of the pressure booster 100 is fixed on the nozzle body 6 of the fuel injection valve 60.
【００１６】１０１は上記増圧装置１００の増圧ピスト
ンであり、外径Ｄなる大径部１０４と外径ｄなる小径部
１０２とを有する２段形状に構成され、同大径部１０４
が上記ハウジング１０５に設けられた大径シリンダ１０
５ａに、小径部１０２が小径シリンダ１０５ｂに夫々摺
動自在に嵌合されている。Reference numeral 101 denotes a pressure boosting piston of the pressure booster 100, which has a two-step shape having a large diameter portion 104 having an outer diameter D and a small diameter portion 102 having an outer diameter d.
Is a large-diameter cylinder 10 provided in the housing 105.
The small diameter portion 102 is slidably fitted to the small diameter cylinder 105b at 5a.
【００１７】これにより、上記ハウジング１０５には、
上記増圧ピストン１０１の大径部１０４が臨む大油室１
０６と小径部１０２が臨む小油室１０７とが形成され
る。そして上記大油室１０６は加圧ポンプ７０のプラン
ジャ室２ｂに作動油管４０を介して接続されるととも
に、逆止弁３０を有する作動油供給管１１１を介して作
動油タンク５０に接続される。また小油室１０７は逆止
弁１０３を有する燃料油管１１０を介して燃料タンク５
に接続されるとともに、ハウジング１０５内の燃料通路
１１２を介して燃料噴射弁６０の燃料通路１０９に接続
される。As a result, the housing 105 has
Large oil chamber 1 facing the large diameter portion 104 of the booster piston 101
06 and a small oil chamber 107 facing the small diameter portion 102 are formed. The large oil chamber 106 is connected to the plunger chamber 2b of the pressurizing pump 70 via the hydraulic oil pipe 40, and is also connected to the hydraulic oil tank 50 via the hydraulic oil supply pipe 111 having the check valve 30. Further, the small oil chamber 107 is connected to the fuel tank 5 via a fuel oil pipe 110 having a check valve 103.
And the fuel passage 109 of the housing 105, and is connected to the fuel passage 109 of the fuel injection valve 60.
【００１８】１１６は作動油供給管路１１１に設けられ
た作動油循環用のポンプ、１１７は燃料供給用のポンプ
である。また上記逆止弁３０はポンプ１１６から大油室
１０６の方向へのみの流れを許容し、逆止弁１０３はポ
ンプ１１７から小油室１０７の方向へのみの流れを許容
するように構成される。Reference numeral 116 denotes a hydraulic oil circulation pump provided in the hydraulic oil supply pipe line 111, and 117 denotes a fuel supply pump. Further, the check valve 30 allows flow only from the pump 116 to the large oil chamber 106, and the check valve 103 allows flow only from the pump 117 to the small oil chamber 107. .
【００１９】上記のように構成された燃料噴射装置を装
備したディーゼルエンジンの運転時において、図示しな
い燃料カムによりプランジャ１が上昇せしめられると、
プランジャ室２ｂ内の作動油は加圧され、作動油管４０
を経て大油室１０６に入り、増圧ピストン１００の大径
部１０４に作用して増圧ピストン１０１を押し下げる。
この時作動油供給管１１１の逆止弁３０は閉じる。上記
増圧ピストン１００の下降により、小油室１０７内の燃
料は増圧ピストン１００の大径部１０４（直径Ｄ）と小
径部１０２（直径ｄ）の面積比で増圧される。During operation of the diesel engine equipped with the fuel injection device constructed as described above, when the plunger 1 is raised by the fuel cam (not shown),
The hydraulic oil in the plunger chamber 2b is pressurized, and the hydraulic oil pipe 40
After entering the large oil chamber 106, it acts on the large diameter portion 104 of the pressure boosting piston 100 to push down the pressure boosting piston 101.
At this time, the check valve 30 of the hydraulic oil supply pipe 111 is closed. Due to the lowering of the pressure boosting piston 100, the fuel in the small oil chamber 107 is boosted by the area ratio of the large diameter portion 104 (diameter D) and the small diameter portion 102 (diameter d) of the pressure boosting piston 100.
【００２０】この増圧された高圧燃料は、ハウジング１
０５内の燃料通路１１２及び燃料噴射弁６０内の燃料通
路９を通って燃料溜１３に入り、針弁７を針弁ばね１０
のばね力に打ち勝って押し上げ、噴孔８からシリンダ内
に噴射される。The pressure-increased high-pressure fuel is supplied to the housing 1
05 through the fuel passage 112 in the fuel injection valve 60 and the fuel passage 9 in the fuel injection valve 60 into the fuel reservoir 13,
It is pushed up by overcoming the spring force of and is injected from the injection hole 8 into the cylinder.
【００２１】このようにして、増圧ピストン１０１によ
り加圧され燃料溜１３に導入される高圧燃料の圧力Ｐ
は、加圧ポンプ７０の吐出圧力Ｐｏに対し、 Ｐ＝Ｐ0 ・Ｄ2 ／（Ｄ2 −ｄ2) の大きさに増圧されることとなり、加圧ポンプ７０の吐
出圧力Ｐｏを大きくすることなく、所要の噴射圧力Ｐが
得られる。In this way, the pressure P of the high-pressure fuel pressurized by the pressure boosting piston 101 and introduced into the fuel reservoir 13
Is increased to P = P 0 · D 2 / (D 2 −d 2 ) with respect to the discharge pressure Po of the pressurizing pump 70, and the discharge pressure Po of the pressurizing pump 70 is increased. Without, the required injection pressure P can be obtained.
【００２２】加圧ポンプ７０のプランジャ１がさらに上
昇し、下部リード１１が給排油孔１２を開くと、大油室
１０６からプランジャ室２ｂに至る管路内の作動油が、
給排油孔１２から給排油管１１５を通って作動油タンク
５０に抜け、増圧ピストン１０１の大径部１０４に作用
する大油室１０６内の作動油圧力が下がり、これによっ
て小油室１０７から燃料溜１３に至る油路内の燃料圧力
も下がり、針弁ばね１０のばね力により針弁７が閉じ、
噴射を終了する。When the plunger 1 of the pressurizing pump 70 further rises and the lower lead 11 opens the oil supply / drain hole 12, the working oil in the conduit from the large oil chamber 106 to the plunger chamber 2b is
The hydraulic oil pressure in the large oil chamber 106 acting on the large diameter portion 104 of the pressure boosting piston 101 is reduced by passing through the oil supply / drain hole 12 to the hydraulic oil tank 50 through the oil supply / drain pipe 115, and thereby the small oil chamber 107. The fuel pressure in the oil passage from the fuel tank to the fuel reservoir 13 is also lowered, and the needle valve 7 is closed by the spring force of the needle valve spring 10.
Finish the injection.
【００２３】その後、作動油は、作動油用のポンプ１１
６により、作動油タンク５０から作動油供給管１１１及
び逆止弁３０を経て、大油室１０６〜作動油管４０〜プ
ランジャ室２ｂに至る作動油路内に入り、さらに給排油
孔１２を経て作動油タンク５０に戻る油路を循環せしめ
られる。これにより、上記作動油経路内の作動油が滞留
して加圧されることが無くなり、従って作動油の温度上
昇も抑制され、これに伴う、作動油の漏れの発生も回避
される。Thereafter, the hydraulic oil is pumped by the hydraulic oil pump 11.
6, the hydraulic oil tank 50 passes through the hydraulic oil supply pipe 111 and the check valve 30 to enter the hydraulic oil passage extending from the large oil chamber 106 to the hydraulic oil pipe 40 to the plunger chamber 2b, and further through the supply / discharge oil hole 12. The oil passage returning to the hydraulic oil tank 50 can be circulated. As a result, the working oil in the working oil passage is prevented from staying and being pressurized, and therefore the temperature rise of the working oil is suppressed, and the leakage of the working oil due to this is also avoided.
【００２４】[0024]
【発明の効果】本発明は、以上のように構成されてお
り、本発明によれば、加圧ポンプの吐出圧力を大きくす
ることなく、増圧装置による増圧作用によって所要の高
い噴射圧力が得られる。また噴射期間以外は作動油が加
圧ポンプと増圧装置との間を循環しているので、作動油
の滞留による圧力上昇やこれに伴なう温度上昇が抑制さ
れ、作動油の漏れの発生も回避される。これにより、エ
ンジンの高出力化に対応できる高噴射圧力の燃料噴射系
を得ることができる。The present invention is configured as described above, and according to the present invention, a required high injection pressure can be obtained by the pressure increasing function of the pressure increasing device without increasing the discharge pressure of the pressurizing pump. can get. In addition, since the hydraulic oil circulates between the pressurizing pump and the pressure booster except during the injection period, the pressure rise due to the accumulation of hydraulic oil and the accompanying temperature rise are suppressed, and the leakage of hydraulic oil occurs. Is also avoided. As a result, it is possible to obtain a fuel injection system having a high injection pressure that can cope with an increase in output of the engine.
【００２５】また、増圧ピストンを境にして、作動油側
と燃料油側とが完全に分離されているので、粗悪油や乳
化油のように取扱性の良好でない燃料も噴射性能の低下
を来たすことなく使用可能となる。Further, since the hydraulic oil side and the fuel oil side are completely separated from each other with the booster piston as a boundary, the injection performance of fuel such as crude oil or emulsified oil which is not good in handling is deteriorated. It can be used without coming.
【図１】本発明の実施形態に係るディーゼル機関用燃料
噴射装置の構成図。FIG. 1 is a configuration diagram of a diesel engine fuel injection device according to an embodiment of the present invention.
【図２】従来の燃料噴射装置の構成図。FIG. 2 is a configuration diagram of a conventional fuel injection device.
１ プランジャ ２ プランジャバレル ２ｂ プランジャ室 ５ 燃料タンク ７ 針弁 ８ 噴孔 ９ 燃料通路 １０ 針弁ばね １２ 給排油孔 １３ 燃料溜 ３０ 逆止弁 ４０ 作動油管 ５０ 作動油タンク ６０ 燃料噴射弁 ７０ 加圧ポンプ １００ 増圧装置 １０１ 増圧ピストン １０２ 小径部 １０３ 逆止弁 １０４ 大径部 １０６ 大油室 １０７ 小油室 １１１ 作動油供給管 １１２ 燃料通路 １１６ ポンプ 1 Plunger 2 Plunger barrel 2b Plunger chamber 5 Fuel tank 7 Needle valve 8 Injection hole 9 Fuel passage 10 Needle valve spring 12 Supply / drain hole 13 Fuel reservoir 30 Check valve 40 Hydraulic oil pipe 50 Hydraulic oil tank 60 Fuel injection valve 70 Pressurization Pump 100 Pressure booster 101 Pressure boosting piston 102 Small diameter part 103 Check valve 104 Large diameter part 106 Large oil chamber 107 Small oil chamber 111 Hydraulic oil supply pipe 112 Fuel passage 116 Pump
Claims (1)
により開弁してシリンダ内に燃料を噴射する燃料噴射装
置において、機油の回転に連動されて作動油タンクから
の作動油を加圧する加圧ポンプを設けるとともに、上記
加圧ポンプからの作動油が導入される大油室と、上記燃
料溜に連通される小油室と、上記大油室に臨み同大油室
内の作動油が作用する大径部及び上記小油室に望む小径
部を有し、同大径部と小径部との面積比で上記小油室か
ら燃料溜に至る燃料油路内の燃料を増圧する増圧ピスト
ンとを備えた増圧装置を設け、上記加圧ポンプと増圧装
置の大油室と上記作動油タンクとを接続する作動油の循
環路を、上記燃料噴射弁の燃料油路とは別個に設けたこ
とを特徴とする増圧装置付き燃料噴射装置。1. In a fuel injection device for injecting fuel into a cylinder by opening a needle valve of a fuel injection valve by fuel pressure in a fuel reservoir, operating oil from a hydraulic oil tank is interlocked with rotation of machine oil. A pressurizing pump for pressurizing is provided, and a large oil chamber into which hydraulic oil from the pressurizing pump is introduced, a small oil chamber communicating with the fuel reservoir, and an operation in the large oil chamber facing the large oil chamber It has a large diameter portion on which oil acts and a small diameter portion desired for the small oil chamber, and the area ratio of the large diameter portion and the small diameter portion increases the pressure of the fuel in the fuel oil passage from the small oil chamber to the fuel reservoir. A pressure booster including a pressure booster piston is provided, and a hydraulic oil circulation path connecting the pressurizing pump, the large oil chamber of the pressure booster and the hydraulic oil tank is used as a fuel oil path of the fuel injection valve. Is a fuel injection device with a pressure booster, which is provided separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP469596A JPH09195882A (en) | 1996-01-16 | 1996-01-16 | Fuel injection device with booster device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP469596A JPH09195882A (en) | 1996-01-16 | 1996-01-16 | Fuel injection device with booster device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09195882A true JPH09195882A (en) | 1997-07-29 |
Family
ID=11591031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP469596A Pending JPH09195882A (en) | 1996-01-16 | 1996-01-16 | Fuel injection device with booster device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09195882A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150066896A (en) * | 2013-12-09 | 2015-06-17 | 현대중공업 주식회사 | The hydraulic fuel injection system for diesel engine |
| KR20150066897A (en) * | 2013-12-09 | 2015-06-17 | 현대중공업 주식회사 | The hydraulic fuel injection system the fuel injection valve for diesel engine |
| CN111648889A (en) * | 2020-05-06 | 2020-09-11 | 天津大学 | Electric control high-pressure oil pump of low-speed diesel engine |
-
1996
- 1996-01-16 JP JP469596A patent/JPH09195882A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150066896A (en) * | 2013-12-09 | 2015-06-17 | 현대중공업 주식회사 | The hydraulic fuel injection system for diesel engine |
| KR20150066897A (en) * | 2013-12-09 | 2015-06-17 | 현대중공업 주식회사 | The hydraulic fuel injection system the fuel injection valve for diesel engine |
| CN111648889A (en) * | 2020-05-06 | 2020-09-11 | 天津大学 | Electric control high-pressure oil pump of low-speed diesel engine |
| CN111648889B (en) * | 2020-05-06 | 2021-08-27 | 天津大学 | Electric control high-pressure oil pump of low-speed diesel engine |
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