JPH06159088A - Internal combustion engine - Google Patents
Internal combustion engineInfo
- Publication number
- JPH06159088A JPH06159088A JP4313486A JP31348692A JPH06159088A JP H06159088 A JPH06159088 A JP H06159088A JP 4313486 A JP4313486 A JP 4313486A JP 31348692 A JP31348692 A JP 31348692A JP H06159088 A JPH06159088 A JP H06159088A
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- injection valve
- fuel
- intercooler
- outside
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
- F02M2200/185—Fuel-injection apparatus having means for maintaining safety not otherwise provided for means for improving crash safety
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内燃機関に関する。FIELD OF THE INVENTION This invention relates to internal combustion engines.
【０００２】[0002]
【従来の技術】通常燃料噴射弁では燃料噴射を開始すべ
きときには弁体を開弁方向に付勢してノズル口を開口
し、燃料噴射を停止すべきときには弁体を閉弁方向に付
勢し弁座に当接せしめてノズル口を閉鎖している。この
ため燃料噴射を停止すべく弁体を弁座に座着せしめると
このとき座着音が発生し、この座着音は不快な騒音とな
る。また、燃料噴射弁はシリンダヘッド内に配置される
ためにノズルホルダ外周面からの伝熱により燃料噴射弁
内の燃料が加熱される。燃料噴射弁内の燃料が加熱され
るとこの燃料内には気泡が発生するために実際の噴射量
が正規の噴射量からずれるようになる。この問題点を解
決するために、ノズルホルダ外周面を樹脂材によってモ
ールド被覆した燃料噴射弁が公知である（実開昭６０−
１２８９６７号公報参照）。2. Description of the Related Art In a normal fuel injection valve, when fuel injection should be started, the valve body is urged in the valve opening direction to open the nozzle port, and when fuel injection should be stopped, the valve element is urged in the valve closing direction. The nozzle port is closed by abutting against the valve seat. Therefore, when the valve body is seated on the valve seat to stop the fuel injection, a seating noise is generated at this time, and the seating noise becomes an unpleasant noise. Further, since the fuel injection valve is arranged in the cylinder head, the heat in the outer peripheral surface of the nozzle holder heats the fuel in the fuel injection valve. When the fuel in the fuel injection valve is heated, bubbles are generated in the fuel so that the actual injection amount deviates from the regular injection amount. In order to solve this problem, there is known a fuel injection valve in which the outer peripheral surface of the nozzle holder is mold-coated with a resin material (actually developed 60-).
(See Japanese Patent No. 128967).
【０００３】[0003]
【発明が解決しようとする課題】この燃料噴射弁ではノ
ズルホルダ外周面を樹脂材によってモールド被覆するこ
とによって外部へ放射される弁体の座着音を低減すると
共にシリンダヘッドからの伝熱を少なくしている。しか
しながら通常燃料噴射弁内において、例えばノズルホル
ダ内を弁体が高速度で摺動して熱が発生するために前記
記載の燃料噴射弁におけるようにノズルホルダ外周面を
樹脂材によってモールド被覆するとこの燃料噴射弁内で
発生した熱が外部へ放熱されにくくなるなるために燃料
噴射弁内の温度が上昇して燃料噴射弁内の燃料には気泡
が発生するようになり、その結果実際の噴射量が正規の
噴射量からずれるという問題がある。In this fuel injection valve, the outer peripheral surface of the nozzle holder is mold-coated with a resin material to reduce the seating noise of the valve body radiated to the outside and to reduce the heat transfer from the cylinder head. is doing. However, in a normal fuel injection valve, for example, since the valve body slides at high speed in the nozzle holder to generate heat, the outer peripheral surface of the nozzle holder is mold-coated with a resin material as in the fuel injection valve described above. Since the heat generated in the fuel injection valve is less likely to be dissipated to the outside, the temperature in the fuel injection valve rises and air bubbles are generated in the fuel in the fuel injection valve, resulting in the actual injection amount. Is deviated from the regular injection amount.
【０００４】[0004]
【課題を解決するための手段】前記問題点を解決するた
めに本発明によれば、吸気マニホルドの上方に間隔を隔
ててインタークーラを配置し、これら吸気マニホルド、
インタークーラおよびエンジン外周面により包囲された
空間内に燃料噴射弁の頂部を突出させ、該空間を外部か
ら遮蔽するために前記吸気マニホルド、インタークーラ
およびエンジン外周面間に形成される全隙間を遮蔽壁に
よって覆っている。In order to solve the above problems, according to the present invention, an intercooler is arranged above the intake manifold with a space therebetween, and the intake manifold,
The top of the fuel injection valve is projected into the space surrounded by the intercooler and the outer peripheral surface of the engine, and the entire space formed between the intake manifold, the intercooler and the outer peripheral surface of the engine is shielded in order to shield the space from the outside. Covered by a wall.
【０００５】[0005]
【作用】燃料噴射弁のエンジンから突出した部分を吸気
マニホルド、インタークーラおよびエンジン外周面なら
びに遮蔽壁によって外部から遮蔽する。The function of the fuel injection valve protruding from the engine is shielded from the outside by the intake manifold, the intercooler, the outer peripheral surface of the engine and the shielding wall.
【０００６】[0006]
【実施例】図１から図３に本発明をディーゼル機関に適
用した場合を示す。しかしながら本発明を火花点火機関
に適用してもよい。図１を参照すると、シリンダヘッド
１は吸気マニホルド２ａ，２ｂを介してインタークーラ
３に接続され、インタークーラ３は吸気ダクト４を介し
て図示しない過給機に接続される。1 to 3 show the case where the present invention is applied to a diesel engine. However, the invention may be applied to spark ignition engines. Referring to FIG. 1, the cylinder head 1 is connected to an intercooler 3 via intake manifolds 2 a and 2 b, and the intercooler 3 is connected to a supercharger (not shown) via an intake duct 4.
【０００７】図１および図３に示されるようにインター
クーラ３は吸気マニホルド２ａの上方に配置され、この
ため吸気マニホルド２ａ，２ｂ、インタークーラ３およ
びシリンダヘッド１外周面により包囲された空間が形成
される。これら吸気マニホルド２ａ，２ｂ、インターク
ーラ３およびシリンダヘッド１外周面間に形成された全
ての隙間を遮蔽壁５によって覆い、外部から遮蔽された
密閉室６を画定する。インタークーラ３から延びる遮蔽
壁５と吸気マニホルド２ａから延びる遮蔽壁５間および
吸気マニホルド２ａと吸気マニホルド２ｂ間にはシール
部材７が配置され密閉室６の気密性を確保している。As shown in FIGS. 1 and 3, the intercooler 3 is arranged above the intake manifold 2a, so that a space surrounded by the intake manifolds 2a and 2b, the intercooler 3 and the outer peripheral surface of the cylinder head 1 is formed. To be done. All the gaps formed between the intake manifolds 2a and 2b, the intercooler 3 and the outer peripheral surface of the cylinder head 1 are covered with a shielding wall 5 to define a sealed chamber 6 shielded from the outside. A seal member 7 is arranged between the shield wall 5 extending from the intercooler 3 and the shield wall 5 extending from the intake manifold 2a and between the intake manifold 2a and the intake manifold 2b to ensure the airtightness of the sealed chamber 6.
【０００８】この密閉室６内には燃料噴射弁８の頂部が
配置され、シリンダヘッド１内には燃料噴射弁８の底部
が配置され、燃料噴射弁８がシリンダヘッド１内に形成
された副燃焼室９内に向けて燃料噴射するように配置さ
れる。燃料噴射弁８には図示しない燃料噴射ポンプから
燃料供給管１０を介して高圧燃料が供給される。図４に
示されるようにこの燃料供給管１０はシール部材７を介
して燃料噴射ポンプと接続されている。A top portion of the fuel injection valve 8 is arranged in the closed chamber 6, a bottom portion of the fuel injection valve 8 is arranged in the cylinder head 1, and the fuel injection valve 8 is formed in the cylinder head 1. It is arranged so as to inject fuel toward the inside of the combustion chamber 9. High-pressure fuel is supplied to the fuel injection valve 8 from a fuel injection pump (not shown) via a fuel supply pipe 10. As shown in FIG. 4, this fuel supply pipe 10 is connected to a fuel injection pump via a seal member 7.
【０００９】過給機における圧縮作用に伴い昇温された
過給空気は吸気ダクト４を介してインタークーラ３内に
流入する。インタークーラ３では過給空気が冷却され、
このため機関性能が向上せしめられる。次いでインター
クーラ３において冷却された過給空気は吸気マニホルド
２ｂ内に流入して２個の流れに分岐され、次いで図２に
示されるように吸気マニホルド２ａ内に流入して４個の
流れに分岐され、各シリンダヘッド１内に形成された吸
気ポート内にそれぞれ流入する。The supercharged air, which has been heated due to the compression action of the supercharger, flows into the intercooler 3 through the intake duct 4. In the intercooler 3, the supercharged air is cooled,
Therefore, the engine performance is improved. Next, the supercharged air cooled in the intercooler 3 flows into the intake manifold 2b and branches into two flows, and then into the intake manifold 2a and branches into four flows as shown in FIG. And flow into the intake ports formed in each cylinder head 1.
【００１０】ところで、通常燃料噴射弁において燃料噴
射を開始すべきときには弁体を開弁方向に付勢してノズ
ル口を開口し、燃料噴射を停止すべきときには弁体を閉
弁方向に付勢し弁座に当接せしめてノズル口を閉鎖して
いる。このため燃料噴射を停止すべく弁体を弁座に座着
せしめるとこのとき座着音が発生する。しかしながら、
本発明では外部から遮蔽された密閉室６内に燃料噴射弁
８を配置しているためにこの座着音の外部への漏れが低
減される。一方、燃料噴射弁８はその底部がシリンダヘ
ッド１内に配置されるためにノズルホルダ外周面からの
伝熱により燃料噴射弁８内の燃料が加熱される。また燃
料噴射弁８内において、例えばノズルホルダ内を弁体が
高速度で摺動して熱が発生しているために燃料噴射弁８
内の燃料が加熱される。このように燃料噴射弁８内の燃
料が加熱されるとこの燃料内には気泡が発生するために
実際の噴射量が正規の噴射量からずれるようになる。し
かしながら、本発明では燃料噴射弁８を密閉室６内に配
置しこの密閉室６内周面の一部がインタークーラ３外周
面により形成されているために密閉室６内が冷却され、
その結果燃料噴射弁８内の燃料が加熱されるのが阻止で
きる。したがって燃料噴射量を正規の噴射量に維持する
ことができる。By the way, when the fuel injection should be started in the normal fuel injection valve, the valve body is biased in the valve opening direction to open the nozzle port, and when the fuel injection should be stopped, the valve body is biased in the valve closing direction. The nozzle port is closed by abutting against the valve seat. Therefore, when the valve body is seated on the valve seat to stop the fuel injection, a seating noise is generated at this time. However,
In the present invention, since the fuel injection valve 8 is arranged in the closed chamber 6 that is shielded from the outside, the leakage of this seating noise to the outside is reduced. On the other hand, since the bottom portion of the fuel injection valve 8 is arranged in the cylinder head 1, the fuel in the fuel injection valve 8 is heated by heat transfer from the outer peripheral surface of the nozzle holder. Further, in the fuel injection valve 8, for example, since the valve body slides at a high speed in the nozzle holder to generate heat, the fuel injection valve 8
The fuel inside is heated. When the fuel in the fuel injection valve 8 is heated in this way, bubbles are generated in this fuel, so that the actual injection amount deviates from the regular injection amount. However, in the present invention, since the fuel injection valve 8 is arranged in the closed chamber 6 and a part of the inner peripheral surface of the closed chamber 6 is formed by the outer peripheral surface of the intercooler 3, the closed chamber 6 is cooled,
As a result, it is possible to prevent the fuel in the fuel injection valve 8 from being heated. Therefore, the fuel injection amount can be maintained at the regular injection amount.
【００１１】また、このように外部から遮蔽された密閉
室６内に燃料噴射弁８を配置することによって、例えば
事故の際に燃料噴射弁８が破損しにくくなる。もし燃料
噴射弁８が破損しても密閉室６は外部から遮蔽されてい
るために燃料が外部に漏れるのが阻止できる。Further, by disposing the fuel injection valve 8 in the closed chamber 6 thus shielded from the outside, the fuel injection valve 8 is less likely to be damaged in the case of an accident, for example. Even if the fuel injection valve 8 is damaged, it is possible to prevent the fuel from leaking to the outside because the closed chamber 6 is shielded from the outside.
【００１２】[0012]
【発明の効果】燃料噴射弁における作動音の外部への漏
れを低減できると共に燃料噴射弁内の燃料が加熱される
のを阻止できる。According to the present invention, it is possible to reduce the leakage of operating noise in the fuel injection valve to the outside and prevent the fuel in the fuel injection valve from being heated.
【図１】ディーゼル機関の側面断面図である。FIG. 1 is a side sectional view of a diesel engine.
【図２】実施例を示す平面断面図である。FIG. 2 is a plan sectional view showing an example.
【図３】図１の線ＩＩＩ−ＩＩＩに沿ってみた断面図で
ある。FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
【図４】図１の線ＩＶ−ＩＶに沿ってみた断面図であ
る。FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
１…シリンダヘッド ２ａ，２ｂ…吸気マニホルド ３…インタークーラ ５…遮蔽壁 ６…密閉室 ８…燃料噴射弁 DESCRIPTION OF SYMBOLS 1 ... Cylinder head 2a, 2b ... Intake manifold 3 ... Intercooler 5 ... Shielding wall 6 ... Closed chamber 8 ... Fuel injection valve
Claims (1)
ンタークーラを配置し、これら吸気マニホルド、インタ
ークーラおよびエンジン外周面により包囲された空間内
に燃料噴射弁の頂部を突出させ、該空間を外部から遮蔽
するために前記吸気マニホルド、インタークーラおよび
エンジン外周面間に形成される全隙間を遮蔽壁によって
覆った内燃機関。1. An intercooler is arranged above an intake manifold with a space therebetween, and a top portion of a fuel injection valve is projected into a space surrounded by the intake manifold, the intercooler and an outer peripheral surface of the engine, and the space is opened to the outside. An internal combustion engine in which all the gaps formed between the intake manifold, the intercooler, and the outer peripheral surface of the engine are covered with a shielding wall in order to shield them from the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4313486A JPH06159088A (en) | 1992-11-24 | 1992-11-24 | Internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4313486A JPH06159088A (en) | 1992-11-24 | 1992-11-24 | Internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06159088A true JPH06159088A (en) | 1994-06-07 |
Family
ID=18041894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4313486A Pending JPH06159088A (en) | 1992-11-24 | 1992-11-24 | Internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06159088A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927254A (en) * | 1996-01-25 | 1999-07-27 | Denso Corporation | Intake duct and intake system for internal combustion engine |
| JP2000179351A (en) * | 1998-12-17 | 2000-06-27 | Toyota Motor Corp | Acoustic shield for injector |
| FR2910562A1 (en) * | 2006-12-20 | 2008-06-27 | Renault Sas | Fixation support for fuel injector of internal combustion engine, has mounting plate possessing support fixation unit on bend pipe of engine, and main body housing injector, where part forms protection screen of injector |
-
1992
- 1992-11-24 JP JP4313486A patent/JPH06159088A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927254A (en) * | 1996-01-25 | 1999-07-27 | Denso Corporation | Intake duct and intake system for internal combustion engine |
| JP2000179351A (en) * | 1998-12-17 | 2000-06-27 | Toyota Motor Corp | Acoustic shield for injector |
| FR2910562A1 (en) * | 2006-12-20 | 2008-06-27 | Renault Sas | Fixation support for fuel injector of internal combustion engine, has mounting plate possessing support fixation unit on bend pipe of engine, and main body housing injector, where part forms protection screen of injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |