JPS5872671A - Fuel injection valve - Google Patents
Fuel injection valveInfo
- Publication number
- JPS5872671A JPS5872671A JP17044981A JP17044981A JPS5872671A JP S5872671 A JPS5872671 A JP S5872671A JP 17044981 A JP17044981 A JP 17044981A JP 17044981 A JP17044981 A JP 17044981A JP S5872671 A JPS5872671 A JP S5872671A
- Authority
- JP
- Japan
- Prior art keywords
- injection valve
- carbon
- heater
- sulfuric acid
- cap
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 239000000567 combustion gas Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052799 carbon Inorganic materials 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 239000000295 fuel oil Substances 0.000 abstract description 7
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
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
【発明の詳細な説明】
本発明は燃料噴射弁に関し、その目的とするところは、
燃焼ガスと接する面が硫酸腐食されたり、カーボンが堆
積するのを防止することができる燃料噴射弁を提供する
ことにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection valve, and its object is to:
An object of the present invention is to provide a fuel injection valve capable of preventing sulfuric acid corrosion and carbon deposition on the surface in contact with combustion gas.
内燃機関の燃料噴射弁の耐久性を阻害する因子として燃
料噴射弁の燃焼ガスと接する面の硫酸腐食とカーボンの
堆積による噴震の形成不良がある。Factors that inhibit the durability of fuel injection valves for internal combustion engines include sulfuric acid corrosion on the surface of the fuel injection valve that comes into contact with combustion gas and poor jet formation due to carbon accumulation.
硫酸腐食は燃焼ガスの温度が硫酸刀露点温度以下に冷や
された場合に硫酸の生成によって起るもので、第１図の
Ｕ）に示すごとく噴射弁の燃焼ガスと接する面がおよそ
１６０℃以下になると発生し易い。Sulfuric acid corrosion occurs due to the formation of sulfuric acid when the temperature of the combustion gas is cooled below the sulfuric acid dew point temperature. It is easy to occur when
一方、カーボンの堆積は部材表面に付着した燃料油の加
熱による軽質油分のＸ発、重質油分の熱分解、炭化など
Ｋよって起るもので、第１図の（ロ）に示すごとく噴射
弁の燃焼ガスと接する面がおよそ１８０℃以上になると
発生し、２８０”Ｃぐらいまで多量に発生する。従来の
燃料噴射弁では、噴射弁本体内に冷却水油の通路を設け
、と九によって噴射弁の燃焼ガスと接する面の温度を１
６０〜１８０℃の範囲Ｃ９内におさめて、硫酸腐食とカ
ーボン堆積の防止とを図っている。しかしながら、上記
の温度制御では、温度範囲ρ９が狭いことと、機関の負
荷、条件によって燃料噴射弁の燃焼ガスから受ける熱ｔ
が変化することによって困難であり、また燃料油の種類
（主に硫黄および重質油成分の分ｔＸよる）によって前
記の温度範囲ρ９が変化するために、従来の冷却による
温度ｉ１１御の技術ではしばしば硫酸腐食またはカーボ
ン堆積による噴霧の形成不良が発生している。On the other hand, carbon deposits occur due to the heating of fuel oil adhering to the surface of parts, resulting in light oil being heated, and heavy oil being thermally decomposed and carbonized. It occurs when the temperature of the surface in contact with the combustion gas exceeds approximately 180 degrees Celsius, and a large amount is generated up to about 280 degrees Celsius.In conventional fuel injection valves, a passage for cooling water and oil is provided inside the injection valve body, and the injection The temperature of the surface of the valve in contact with the combustion gas is 1
The temperature is kept within the range C9 of 60 to 180°C to prevent sulfuric acid corrosion and carbon deposition. However, in the above temperature control, the temperature range ρ9 is narrow and the heat t received from the combustion gas of the fuel injection valve depends on the engine load and conditions.
Since the above temperature range ρ9 changes depending on the type of fuel oil (mainly depending on the sulfur and heavy oil components tX), conventional technology for controlling the temperature i11 by cooling is difficult. Poor spray formation often occurs due to sulfuric acid corrosion or carbon deposits.
そこで本発明はかかる問題点を解消した燃料噴射弁を提
供するものであって、その特徴とするところは、噴射弁
本体内に、燃焼ガスと接する面を３００〜５００℃の範
囲内で加熱するヒーターを設けたことにある。Therefore, the present invention provides a fuel injection valve that solves these problems, and its feature is that the surface in contact with combustion gas is heated within the range of 300 to 500°C within the injection valve body. This is due to the installation of a heater.
以下、本発明の一実施例を第２図に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on FIG. 2.
（１）Ｕ噴射弁本体、（２）はノズルチップ、（３）は
噴孔、（４）はニードル弁、（５）け燃料油入口穴、（
６）は中央の貫通孔が上記ノズルチップ（２）に外嵌す
ると共に外周縁立ち上がり部が噴射弁本体（１）の底面
に当接するキャップであって、このキャップ（６）と噴
射弁本体（１）およびノズルチップ（２）とは房接され
ている。（７）け噴射弁本体（１）を貫通してキャップ
（６）内に連通ずる連通孔、（８）はキャップ（６）内
に配設されたヒーター、（９）は上記連通孔（７）内に
押通されたヒーター（８）のコードである。(1) U injection valve body, (2) nozzle tip, (3) nozzle hole, (4) needle valve, (5) fuel oil inlet hole, (
6) is a cap whose central through hole fits over the nozzle tip (2) and whose outer peripheral edge rises abuts the bottom surface of the injection valve body (1), and this cap (6) and the injection valve body (1) 1) and the nozzle tip (2) are tufted. (7) A communication hole that passes through the injection valve body (1) and communicates with the cap (6), (8) is a heater disposed inside the cap (6), and (9) is a communication hole that communicates with the cap (6). ) is the cord of the heater (8) pushed through.
上記構成において、ヒーター（８）によりノズルチップ
（２）およびキャップ（６）の表面を３００〜５００°
Ｃに加熱するものである。In the above configuration, the surfaces of the nozzle tip (2) and the cap (6) are heated at 300 to 500 degrees by the heater (8).
It is heated to C.
ノズルチップ（２）およびキャップ（６）の表面を３０
０℃以上に加熱すると、＠１図に示すごとく、いかなる
種類の燃料油を使用しても硫酸腐食が発生しない。また
燃料粒子は、その蒸発速度が太きくなることＫよって、
ノズルチップ（２）およびキイやｌプ（６）の表面に接
触しなくなり、その表面から浮いた状態となってカーボ
ンが付着しにくくなる。わずかにカーボンが付着したと
しても、上記表面の温度が高いことから、カーボンは燃
焼しゃすくなシ、堆積は少なくなる。The surface of the nozzle tip (2) and cap (6)
When heated above 0°C, sulfuric acid corrosion does not occur no matter what type of fuel oil is used, as shown in Figure @1. Also, since the evaporation rate of fuel particles increases,
It does not come into contact with the surfaces of the nozzle tip (2) and the key or lug (6), and floats from the surface, making it difficult for carbon to adhere. Even if a small amount of carbon adheres to the surface, since the temperature of the surface is high, the carbon will not be easily combusted and the amount of carbon deposited will be reduced.
一方、燃料噴射弁の加熱温度の上限は、噴射弁材料の硬
度によって左右される。すなわち温度上昇による硬度低
下によって噴孔（３）が早期に摩耗し、噴霧の形成が不
都合となシ、燃料不良に到る。現在、噴射弁に使用され
ている材料の硬度低下の限界は、ステライトで７００℃
程度である。したがって加熱温度の上限／ｌ１７００℃
ということになる。On the other hand, the upper limit of the heating temperature of the fuel injection valve depends on the hardness of the injection valve material. In other words, the nozzle hole (3) wears out prematurely due to the decrease in hardness due to the temperature increase, which makes it difficult to form a spray and leads to fuel failure. Currently, the limit of hardness reduction of materials used for injection valves is 700℃ for Stellite.
That's about it. Therefore, the upper limit of heating temperature /l1700℃
It turns out that.
以上述べたごとく本発明の燃料噴射弁によれば、噴射弁
本体内に、燃焼ガスと接する面を３００〜７００℃の範
囲内で加熱するヒーターを設けであるから、燃焼ガスと
接する面が硫酸腐食させられるおそれがなく、またカー
ボンの堆積もほとんど生じない。したがって噴震の形成
を良好に保持することができるものである。As described above, according to the fuel injection valve of the present invention, since the heater for heating the surface in contact with the combustion gas within the range of 300 to 700°C is provided in the injection valve body, the surface in contact with the combustion gas is sulfuric acid. There is no risk of corrosion, and almost no carbon deposits occur. Therefore, the formation of eruptions can be maintained well.
第１図は燃焼ガスと接する面の表面温度と硫酸腐食の量
およびカーボンの堆積量との関係を示すグラフ、４！；
２図は本発明の一実施例を示す縦断面図である。
（１）・・・噴射弁本体、（２）・・・ノズルチップ、
（６）・・・キャップ、（８）・・・ヒーター
代理人 森 木 義 仏
書１図
第２図Figure 1 is a graph showing the relationship between the surface temperature of the surface in contact with combustion gas, the amount of sulfuric acid corrosion, and the amount of carbon deposition.4! ;
FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. (1)...Injection valve body, (2)...Nozzle tip,
(6)... Cap, (8)... Heater agent Yoshi Moriki Buddhist Book 1 Figure 2
Claims (1)
７００℃の範囲内で加熱するヒーターを設けたことを特
徴とする燃料噴射弁。1. Inside the injection valve body, the surface in contact with the combustion gas should be
A fuel injection valve characterized by being equipped with a heater that heats within a range of 700°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17044981A JPS5872671A (en) | 1981-10-23 | 1981-10-23 | Fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17044981A JPS5872671A (en) | 1981-10-23 | 1981-10-23 | Fuel injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5872671A true JPS5872671A (en) | 1983-04-30 |
Family
ID=15905130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17044981A Pending JPS5872671A (en) | 1981-10-23 | 1981-10-23 | Fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5872671A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59175652U (en) * | 1983-05-12 | 1984-11-24 | ヤンマーディーゼル株式会社 | Seawater direct cooling direct injection internal combustion engine |
| US4886032A (en) * | 1988-11-22 | 1989-12-12 | Chrysler Motors Corporation | Fuel injector heating method |
| EP0790404A1 (en) * | 1996-02-14 | 1997-08-20 | Hitachi, Ltd. | In-cylinder fuel injection device and internal combustion engine mounting the same |
| JP2004316520A (en) * | 2003-04-15 | 2004-11-11 | Denso Corp | Fuel injection device |
| JP2014196853A (en) * | 2013-03-29 | 2014-10-16 | トヨタ自動車株式会社 | Control device of glow plug |
| CN108223228A (en) * | 2018-02-26 | 2018-06-29 | 中国船舶重工集团公司第七研究所 | For the experimental rig and test method of fuel injection system |
-
1981
- 1981-10-23 JP JP17044981A patent/JPS5872671A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59175652U (en) * | 1983-05-12 | 1984-11-24 | ヤンマーディーゼル株式会社 | Seawater direct cooling direct injection internal combustion engine |
| US4886032A (en) * | 1988-11-22 | 1989-12-12 | Chrysler Motors Corporation | Fuel injector heating method |
| EP0790404A1 (en) * | 1996-02-14 | 1997-08-20 | Hitachi, Ltd. | In-cylinder fuel injection device and internal combustion engine mounting the same |
| JP2004316520A (en) * | 2003-04-15 | 2004-11-11 | Denso Corp | Fuel injection device |
| JP2014196853A (en) * | 2013-03-29 | 2014-10-16 | トヨタ自動車株式会社 | Control device of glow plug |
| CN108223228A (en) * | 2018-02-26 | 2018-06-29 | 中国船舶重工集团公司第七研究所 | For the experimental rig and test method of fuel injection system |
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