JPH045732Y2 - - Google Patents
Info
- Publication number
- JPH045732Y2 JPH045732Y2 JP1983155162U JP15516283U JPH045732Y2 JP H045732 Y2 JPH045732 Y2 JP H045732Y2 JP 1983155162 U JP1983155162 U JP 1983155162U JP 15516283 U JP15516283 U JP 15516283U JP H045732 Y2 JPH045732 Y2 JP H045732Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- fuel
- valve
- combustion
- valves
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 68
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
本考案は多弁式燃料噴射弁を有する機関の燃料
噴射装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection device for an engine having a multi-valve fuel injection valve.
従来のデイーゼル機関の燃料噴射弁は、燃料ポ
ンプによつて燃料を加圧し、燃料圧力がある設定
圧力に達すると、燃料噴射弁のニードル弁が開い
て燃料が燃焼室へ噴出する。 In conventional diesel engine fuel injection valves, fuel is pressurized by a fuel pump, and when the fuel pressure reaches a certain set pressure, the needle valve of the fuel injection valve opens and fuel is injected into the combustion chamber.
多弁式の機関の場合にも第１図に示すように、
燃料は１つの燃料ポンプ４で加圧され配管５を介
して全ての燃料噴射弁２，２，３，３により一斉
に燃焼室１に噴射される。このため、燃焼室１で
は燃焼が急速に起こり第３図に示すような前高の
受熱モードとなる。 In the case of a multi-valve type engine, as shown in Figure 1,
Fuel is pressurized by one fuel pump 4 and is injected into the combustion chamber 1 via piping 5 by all the fuel injection valves 2, 2, 3, and 3 all at once. For this reason, combustion occurs rapidly in the combustion chamber 1, resulting in a high front heat receiving mode as shown in FIG.
理論的には、受熱モードは後高が良いとされて
いる。従つて、燃焼室１でゆつくり燃焼が始ま
り、急速に燃焼が終わる様に工夫する必要があ
る。 Theoretically, it is said that the heat receiving mode is better when the rear height is high. Therefore, it is necessary to take measures so that combustion starts slowly in the combustion chamber 1 and ends quickly.
本考案の目的は上記欠点を排除し、後高モード
の燃焼を実現して低燃費とする燃料噴射装置を提
供することであり、その特徴とするところは、多
弁式燃料噴射弁のデイーゼル機関において、燃料
ポンプ及び燃料噴射弁よりなる燃料噴射系統を
別々に２組設け、各々の燃料噴射系統の燃料噴射
開始時期を前後にずらすとともに、燃料噴射開始
時期が遅い方の燃料噴射系統の啓開圧力を高くし
てなることである。 The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a fuel injection device that realizes combustion in the rear high mode and achieves low fuel consumption. , two sets of fuel injection systems each consisting of a fuel pump and a fuel injection valve are provided separately, and the fuel injection start timing of each fuel injection system is shifted back and forth, and the opening pressure of the fuel injection system with a later fuel injection start time is adjusted. This is caused by increasing the
即ち、多弁式機関において、それぞれの燃料噴
射弁を啓開圧力の異なる組合せにして、機関に装
備する。これによつて、後高の受熱モードを得る
燃焼、即ちゆつくりと燃焼を始め、急速に燃焼が
終わるようにすることができる。 That is, in a multi-valve engine, each fuel injection valve is equipped with a different combination of opening pressures. This allows combustion to obtain a high heat receiving mode, that is, to start the combustion slowly and finish the combustion quickly.
以下図面を参照して本考案による実施例につき
説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第２図は本考案による１実施例の燃料噴射装置
を示す説明図である。 FIG. 2 is an explanatory diagram showing one embodiment of the fuel injection device according to the present invention.
図において、機関の燃焼室１内に燃料を噴射す
るよう配置された燃料噴射弁２，３はそれぞれの
燃料パイプ５，５′によりそれぞれの燃料ポンプ
４，４′に連結している。燃料噴射弁２，３の啓
開圧力はそれぞれ異なるよう調整して取付ける。 In the figure, fuel injection valves 2, 3 arranged to inject fuel into the combustion chamber 1 of the engine are connected by respective fuel pipes 5, 5' to respective fuel pumps 4, 4'. The opening pressures of the fuel injection valves 2 and 3 are adjusted and installed to be different from each other.
上記構成の場合の作用、効果について述べる。 The functions and effects of the above configuration will be described.
燃料ポンプ４，４′によりそれぞれ加圧された
燃料はそれぞれの燃料パイプ５，５′を経てそれ
ぞれ啓開圧力の異なる燃料噴射弁２，３により燃
焼室１に噴射される。 The fuel pressurized by the fuel pumps 4, 4' is injected into the combustion chamber 1 through the fuel pipes 5, 5' by the fuel injection valves 2, 3 having different opening pressures, respectively.
そのときの噴射状況は第４図に示すように、ク
ランク角度がある角度に達したとき、燃料圧力が
燃料噴射弁２の啓開圧力に達して、燃料噴射弁２
が噴射を始める。クランク角度がさらに進んだと
ころで、燃料圧力が燃料噴射弁３の啓開圧力に達
して、燃料噴射弁３が噴射を始める。燃料噴射の
終了は燃料噴射弁２，３とも同時に、又は燃料噴
射弁３の方が遅れて終了する。 The injection situation at that time is shown in Fig. 4, when the crank angle reaches a certain angle, the fuel pressure reaches the opening pressure of the fuel injection valve 2, and the fuel injection valve 2
starts spraying. When the crank angle further advances, the fuel pressure reaches the opening pressure of the fuel injection valve 3, and the fuel injection valve 3 starts injection. The fuel injection ends at the same time for both the fuel injection valves 2 and 3, or the fuel injection valve 3 ends later.
要するに、本考案による燃料噴射装置は、燃料
ポンプ及び燃料噴射弁よりなる燃料噴射系統を
別々に２組設け、各々の燃料噴射系統の燃料噴射
開始時期を前後にずらすとともに、燃料噴射開始
時期が遅い方の燃料噴射系統の啓開圧力を高くし
てなることにより、噴射率の低い期間及び高い期
間の設定が自由にできる様になる。例えば、噴射
率の低い燃料噴射を終えてから、噴射率の高い燃
料噴射を終える様な、燃料効率を低下させる後燃
えを起こさない燃料噴射モードの設定が可能とな
る。 In short, the fuel injection device according to the present invention has two separate sets of fuel injection systems each consisting of a fuel pump and a fuel injection valve, and the fuel injection start timing of each fuel injection system is shifted back and forth, and the fuel injection start timing is late. By increasing the opening pressure of the one fuel injection system, it becomes possible to freely set the low and high injection rate periods. For example, it is possible to set a fuel injection mode that does not cause afterburn that reduces fuel efficiency, such as ending fuel injection with a high injection rate after finishing fuel injection with a low injection rate.
この様な燃料噴射モードの自由な設定は、シリ
ンダーにつき１コの燃料ポンプでは不可能であ
る。 Such free setting of the fuel injection mode is not possible with one fuel pump per cylinder.
第１図は従来の多弁式燃料噴射装置を示す説明
図、第２図は本考案による１実施例の多弁式燃料
噴射装置を示す説明図、第３図は従来の受熱モー
ド図、第４図は第２図の場合の受熱モード図であ
る。
２，３……燃料噴射弁、４，４′……燃料ポン
プ、５，５′……燃料パイプ。
Fig. 1 is an explanatory diagram showing a conventional multi-valve fuel injection device, Fig. 2 is an explanatory diagram showing an embodiment of the multi-valve fuel injection device according to the present invention, Fig. 3 is a conventional heat receiving mode diagram, and Fig. 4 is a heat reception mode diagram for the case of FIG. 2. 2, 3... Fuel injection valve, 4, 4'... Fuel pump, 5, 5'... Fuel pipe.
Claims (1)
燃料ポンプ及び燃料噴射弁よりなる燃料噴射系統
を別々に２組設け、各々の燃料噴射系統の燃料噴
射開始時期を前後ずらすとともに、燃料噴射開始
時期が遅い方の燃料噴射系統の啓開圧力を高くし
てなることを特徴とする燃料噴射装置。 In diesel engines with multi-valve fuel injection valves,
Two sets of fuel injection systems each consisting of a fuel pump and a fuel injection valve are provided separately, and the fuel injection start timing of each fuel injection system is shifted back and forth, and the opening pressure of the fuel injection system with a later fuel injection start time is increased. A fuel injection device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15516283U JPS6063069U (en) | 1983-10-07 | 1983-10-07 | fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15516283U JPS6063069U (en) | 1983-10-07 | 1983-10-07 | fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6063069U JPS6063069U (en) | 1985-05-02 |
| JPH045732Y2 true JPH045732Y2 (en) | 1992-02-18 |
Family
ID=30342768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15516283U Granted JPS6063069U (en) | 1983-10-07 | 1983-10-07 | fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6063069U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2578820Y2 (en) * | 1991-11-29 | 1998-08-20 | 三菱自動車工業株式会社 | Diesel engine fuel injection system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562459A (en) * | 1979-06-22 | 1981-01-12 | Mitsubishi Heavy Ind Ltd | Fuel injection device for internal combustion engine |
-
1983
- 1983-10-07 JP JP15516283U patent/JPS6063069U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562459A (en) * | 1979-06-22 | 1981-01-12 | Mitsubishi Heavy Ind Ltd | Fuel injection device for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6063069U (en) | 1985-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH045732Y2 (en) | ||
| JPS6113740Y2 (en) | ||
| JPH046564U (en) | ||
| JPH0351163U (en) | ||
| JPS6113741Y2 (en) | ||
| JPH0117648Y2 (en) | ||
| JPS58158163U (en) | Diesel engine fuel filter blockage prevention device | |
| JPH075247Y2 (en) | diesel engine | |
| JPH036048U (en) | ||
| JPS63140164U (en) | ||
| JPH0254366U (en) | ||
| JPS6113742Y2 (en) | ||
| JPS5812458B2 (en) | In-cylinder injection hydrogen engine | |
| JPS5836172B2 (en) | In-cylinder injection hydrogen engine | |
| JPS59131571U (en) | Dual fuel supply system for compression ignition engines | |
| JPS6014909B2 (en) | fuel injector | |
| JPS58163634U (en) | insulated diesel engine | |
| JPS60128968U (en) | Diesel engine fuel supply system | |
| JPS5914969U (en) | Diesel engine fuel injection system | |
| JPS5845945U (en) | Diesel engine starting aid | |
| JPS61200462U (en) | ||
| JPS6342862U (en) | ||
| JPS62117225U (en) | ||
| JPS58180372U (en) | Fuel supply system for fuel-injected internal combustion engines | |
| JPS59194557U (en) | Internal combustion engine with mechanical supercharger |