JPH053742Y2 - - Google Patents
Info
- Publication number
- JPH053742Y2 JPH053742Y2 JP1987033684U JP3368487U JPH053742Y2 JP H053742 Y2 JPH053742 Y2 JP H053742Y2 JP 1987033684 U JP1987033684 U JP 1987033684U JP 3368487 U JP3368487 U JP 3368487U JP H053742 Y2 JPH053742 Y2 JP H053742Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- delivery pipe
- camshaft
- fuel
- fuel injection
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 74
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 238000000889 atomisation Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、各気筒における燃料噴射弁に対して
燃料噴射ポンプからの燃料を分配するための燃料
デリバリ管を備えた内燃機関に関するものであ
る。[Detailed description of the invention] [Field of industrial application] The present invention relates to an internal combustion engine equipped with a fuel delivery pipe for distributing fuel from a fuel injection pump to fuel injection valves in each cylinder. .
燃料デリバリ管を備えた内燃機関において、そ
の各気筒に対する各燃料噴射弁における先端を、
シリンダヘツドに穿設した装着孔に挿入する場
合、これら各燃料噴射弁に燃料噴射ポンプからに
燃料を分配するための燃料デリバリ管には、例え
ば、実開昭57−78769号公報等に記載されている
ように、該燃料デリバリ管を、シリンダヘツドの
側面に接合された吸気マニホールドに対して取付
けるものと、例えば、特開昭60−81592号公報の
第１図及び第２図に記載されているように、該燃
料デリバリ管をシリンダヘツドに対して取付ける
ものが存在する。
In an internal combustion engine equipped with a fuel delivery pipe, the tip of each fuel injection valve for each cylinder is
When inserted into the mounting hole drilled in the cylinder head, the fuel delivery pipe for distributing fuel from the fuel injection pump to each fuel injection valve is as described in, for example, Japanese Utility Model Application No. 57-78769. As shown in FIG. As shown in the figure, there is a method in which the fuel delivery pipe is attached to the cylinder head.
しかし、前者のように燃料デリバリ管を、吸気
マニホールドに取付けた場合には、吸気マニホー
ルドの温度は比較的低いので、燃料デリバリ管に
ベーパーロツク等の熱害が発生することを回避で
きる反面、吸気マニホールドはシリンダヘツドに
対してガスケツトを挟むんでボルト締結されてい
ることにより、当該吸気マニホールドに取付けた
燃料デリバリ管と、シリンダヘツドにおける燃料
噴射弁の装着孔との間における関係寸法に大きい
バラ付きが存在するから、この寸法のバラ付きの
ために、吸気マニホールドに取付く燃料デリバリ
管と、シリンダヘツドとの間に装着した燃料噴射
弁における軸線の傾き方向にずれができ、このた
めに燃料噴射弁から燃料室に対する燃料の噴射方
向がずれて、吸気ポートの壁面に付着する燃料の
量が多くなることにより、燃料の霧化が悪くな
り、燃焼不良によつて排気ガス中における未燃焼
成分が増大するのであり、しかも、前記燃料噴射
弁における軸線の傾き方向のずれのために、燃料
噴射弁のシリンダヘツドに対する装着部に燃料漏
れが発生するのである。
However, when the fuel delivery pipe is attached to the intake manifold as in the former case, since the temperature of the intake manifold is relatively low, it is possible to avoid heat damage such as vapor lock on the fuel delivery pipe. Because the cylinder head is bolted to the cylinder head with a gasket in between, there is a large variation in the relative dimensions between the fuel delivery pipe attached to the intake manifold and the mounting hole of the fuel injection valve in the cylinder head. Therefore, due to this variation in dimensions, the inclination direction of the axis of the fuel injection valve installed between the fuel delivery pipe attached to the intake manifold and the cylinder head may be misaligned. The direction of fuel injection into the fuel chamber is misaligned, and the amount of fuel that adheres to the wall of the intake port increases, resulting in poor fuel atomization and an increase in unburned components in the exhaust gas due to poor combustion. Moreover, due to the deviation in the inclination direction of the axis of the fuel injection valve, fuel leakage occurs at the mounting portion of the fuel injection valve to the cylinder head.
また、後者のように燃料デリバリ管を、シリン
ダヘツドに対して直接的に取付けた場合には、該
燃料デリバリ管と、シリンダヘツドにおける燃料
噴射弁の装着孔との間における関係寸法のバラ付
きは、前者の場合よりも遥かに小さいから、燃料
噴射弁における軸線の傾き方向のずれを僅少にで
きる利点を有する反面、シリンダヘツドの温度は
可成り高く、この熱が燃料デリバリ管に伝達する
から、燃料デリバリ管にベーバーロツク等の熱害
が発生するのであつた。 In addition, when the fuel delivery pipe is directly attached to the cylinder head as in the latter case, there is no variation in the relative dimensions between the fuel delivery pipe and the mounting hole of the fuel injection valve in the cylinder head. , which is much smaller than the former case, has the advantage of being able to minimize deviations in the direction of inclination of the axial line of the fuel injection valve, but on the other hand, the temperature of the cylinder head is quite high, and this heat is transferred to the fuel delivery pipe. Heat damage such as vapor lock occurred in the fuel delivery pipe.
本考案は、この両者の不具合を解消することを
目的とするものである。 The present invention aims to eliminate both of these problems.
このため本考案は、シリンダヘツドの側面にお
ける各気筒の箇所に、燃料噴射弁の装着孔を設け
る一方、前記シリンダヘツドの側面と略平行に配
設した燃料デリバリ管と、前記各燃料噴射弁用装
着孔との間に燃料噴射弁を各々装着し、且つ、前
記シリンダヘツドの上面に、カム軸を覆うシリン
ダヘツドカバーを着脱自在に締結して成る内燃機
関において、前記シリンダヘツドには、前記カム
軸の下半分が嵌まる軸受部を、シリンダヘツドカ
バーには、前記カム軸の上半分に被嵌する軸受部
を各々造形して、これら軸受部にてカム軸を軸支
する一方、前記燃料デリバリ管を、当該燃料デリ
バリ管に固着したブラケツトを介して前記シリン
ダヘツドカバーに対して着脱可能に取付ける構成
にした。
For this reason, the present invention provides mounting holes for the fuel injection valves at the locations of each cylinder on the side surface of the cylinder head, and a fuel delivery pipe disposed approximately parallel to the side surface of the cylinder head, and a mounting hole for each of the fuel injection valves. In an internal combustion engine, a fuel injection valve is mounted between each cylinder head and a mounting hole, and a cylinder head cover covering a camshaft is removably fastened to the upper surface of the cylinder head. A bearing part into which the lower half of the shaft fits, and a bearing part into which the upper half of the camshaft fits are formed on the cylinder head cover, and these bearing parts pivotally support the camshaft. The delivery pipe is configured to be removably attached to the cylinder head cover via a bracket fixed to the fuel delivery pipe.
内燃機関においてシリンダヘツドの上面に着脱
自在に締結されるシリンダヘツドカバーは、その
間に、シール用のガスケツトが挟まれていること
により、シリンダヘツドよりも低い温度になつて
いるから、このシリンダヘツドカバーに、各気筒
における燃料噴射弁に燃料を分配するための燃料
デリバリ管を、当該燃料デリバリ管に固着したブ
ラケツトを介して取付けることにより、燃料デリ
バリ管を、当該燃料デリバリ管に対する熱害を生
じない状態のもとで確実に支持することができ
る。
The cylinder head cover, which is removably fastened to the top surface of the cylinder head in an internal combustion engine, has a sealing gasket sandwiched between the covers and has a lower temperature than the cylinder head. By attaching the fuel delivery pipe for distributing fuel to the fuel injection valves in each cylinder via a bracket fixed to the fuel delivery pipe, heat damage to the fuel delivery pipe is not caused. It can be reliably supported under various conditions.
一方、シリンダヘツドに、前記カム軸の下半分
が嵌まる軸受部を、シリンダヘツドカバーに、前
記カム軸の上半分に被嵌する軸受部を各々造形し
て、これら軸受部にてカム軸を軸支するように構
成したことにより、シリンダヘツドカバーを、シ
リンダヘツドに対してカム軸を介して常に正しい
位置に取付けすることができて、その結果、シリ
ンダヘツドカバーに取付く燃料デリバリ管と、シ
リンダヘツドの側面における燃料噴射弁用装着孔
との間における関係寸法のバラ付きは、燃料デリ
バリ管をシリンダヘツドに対して直接的に取付け
る場合と略同様に小さくなるから、燃料デリバリ
管とシリンダヘツドにおける装着孔との間に装着
される燃料噴射弁における軸線の傾きのずれを僅
少にできるのである。 On the other hand, a bearing part into which the lower half of the camshaft fits is formed on the cylinder head, and a bearing part into which the upper half of the camshaft fits into the cylinder head cover, and these bearing parts hold the camshaft. By arranging the cylinder head cover to be pivoted, the cylinder head cover can always be attached to the cylinder head in the correct position via the camshaft, and as a result, the fuel delivery pipe attached to the cylinder head cover, Variations in the relative dimensions between the fuel injection valve mounting hole on the side surface of the cylinder head are reduced to the same extent as when the fuel delivery pipe is installed directly to the cylinder head. This makes it possible to minimize the deviation in the inclination of the axis of the fuel injection valve mounted between the mounting hole and the mounting hole.
従つて本考案によれば、各気筒における燃料噴
射弁に対して燃料を分配するための燃料デリバリ
管の取付けに際して、当該燃料デリバリ管に熱害
が及ぶこと、及び各燃料噴射弁における軸線の狂
いによる燃料の霧化性の低下、延いては排気ガス
の悪化や、燃料の漏れ発生を招来することを確実
に回避できる効果を有する。 Therefore, according to the present invention, when installing the fuel delivery pipe for distributing fuel to the fuel injection valves in each cylinder, it is possible to avoid heat damage to the fuel delivery pipe and misalignment of the axis of each fuel injection valve. This has the effect of reliably avoiding the deterioration of fuel atomization due to this, resulting in deterioration of exhaust gas and occurrence of fuel leakage.
以下、本考案の実施例を図面について説明する
に、図において符号１はシリンダヘツドを示し、
その下面には、各気筒の箇所に燃焼室２が凹み形
成され、上面には、シリンダヘツドカバー３が、
複数本のボルト４にて着脱自在に締結されてい
る。なお、図示しないが、シリンダヘツド１の上
面と、シリンダヘツドカバー３との間には、シー
ル用のガスケツトが介挿されている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a cylinder head;
A combustion chamber 2 is recessed at the location of each cylinder on the lower surface, and a cylinder head cover 3 is provided on the upper surface.
It is removably fastened with a plurality of bolts 4. Although not shown, a sealing gasket is inserted between the upper surface of the cylinder head 1 and the cylinder head cover 3.
前記シリンダヘツド１における一側面には、前
記各燃焼室２への吸気ポート５が、他側面には、
前記各燃焼室２からの排気ポート６が各々開口し
ており、前記吸気ポート５の燃焼室２への開口部
には吸気弁７が、前記排気ポート６の燃焼室２へ
の開口部には排気弁８が各々設けられている。 The cylinder head 1 has an intake port 5 to each combustion chamber 2 on one side thereof, and an intake port 5 to each combustion chamber 2 on the other side thereof.
The exhaust ports 6 from each combustion chamber 2 are open, and an intake valve 7 is provided at the opening of the intake port 5 to the combustion chamber 2, and an intake valve 7 is provided at the opening of the exhaust port 6 to the combustion chamber 2. An exhaust valve 8 is provided in each case.
更に、前記シリンダヘツド１における一側面に
は、各吸気ポート５の箇所に燃料噴射弁用の装着
孔９が各々穿設されている。 Further, on one side of the cylinder head 1, mounting holes 9 for fuel injection valves are formed at the locations of the respective intake ports 5, respectively.
また、前記シリンダヘツド１の上面とシリンダ
ヘツドカバー３とで囲われた上面室内には、前記
各吸気弁７に対するカム軸１０と、各排気弁８に
対するカム軸１１とが平行に配設され、シリンダ
ヘツド１の上面には、前記吸気弁用カム軸１０の
下半分が嵌まる複数個の軸受部１２を、シリンダ
ヘツドカバー３内には、前記吸気弁用カム軸１０
の上半分に被嵌する複数個の軸受部１３を各々一
体的に造形して、これら軸受部１２，１３によつ
て前記吸気弁用カム軸１０を軸支する。なお、排
気弁用カム軸１１も、前記吸気弁用カム軸１０の
場合と同様に、シリンダヘツド１の上面とシリン
ダヘツドカバー３内に造形した軸受部によつて軸
支されている。 Further, in a top chamber surrounded by the top surface of the cylinder head 1 and the cylinder head cover 3, a camshaft 10 for each intake valve 7 and a camshaft 11 for each exhaust valve 8 are disposed in parallel, The upper surface of the cylinder head 1 is provided with a plurality of bearings 12 into which the lower half of the intake valve camshaft 10 is fitted, and the cylinder head cover 3 is provided with a plurality of bearings 12 into which the lower half of the intake valve camshaft 10 is fitted.
A plurality of bearing portions 13 that fit into the upper half of the intake valve camshaft 10 are each integrally formed, and the intake valve camshaft 10 is pivotally supported by these bearing portions 12 and 13. Incidentally, the exhaust valve camshaft 11 is also supported by a bearing portion formed on the upper surface of the cylinder head 1 and inside the cylinder head cover 3, as in the case of the intake valve camshaft 10.
符号１４は、前記シリンダヘツド１における一
側面１ａと略平行に配設した燃料デリバリ管を示
し、該燃料デリバリ管１４と、前記各燃料噴射弁
用装着孔９との間には、燃料噴射弁１５を、当該
燃料噴射弁１５における軸線１５ａが前記吸気ポ
ート５の燃焼室２への開口部の略中心部に向かう
ように装着されている。 Reference numeral 14 indicates a fuel delivery pipe disposed substantially parallel to one side surface 1a of the cylinder head 1, and between the fuel delivery pipe 14 and each fuel injection valve mounting hole 9, a fuel injection valve is provided. 15 is mounted so that the axis 15a of the fuel injection valve 15 is directed toward substantially the center of the opening of the intake port 5 into the combustion chamber 2.
そして、前記シリンダヘツドカバー３の側面に
は、燃料デリバリ管取付け用のボス部１６を一体
的に造形し、このボス部１６に対して、前記燃料
デリバリ管１４に固着したブラケツト１７を、そ
の間にインシユレータ１８を挟んでボルト１９に
て締結する。 A boss part 16 for attaching the fuel delivery pipe is integrally formed on the side surface of the cylinder head cover 3, and a bracket 17 fixed to the fuel delivery pipe 14 is placed between the boss part 16 and the boss part 16. Fasten with bolts 19 with the insulator 18 in between.
なお、前記各吸気ポート５には、図示しないサ
ージタンク等からの吸気管２０が各々接続されて
いる。 Incidentally, each of the intake ports 5 is connected to an intake pipe 20 from a surge tank (not shown) or the like.
このようにシリンダヘツド１に、吸気弁用カム
軸１０の下半分が嵌まる軸受部１２を、シリンダ
ヘツドカバー３に、吸気弁用カム軸１０の上半分
に被嵌する軸受部１３を各々造形して、これら軸
受部１２，１３にて吸気弁用カム軸１０を軸支す
るように構成したことにより、シリンダヘツドカ
バー３を、シリンダヘツド１に対して複数本のボ
ルト４にて締結するに際して、このボルト４とそ
のボルト孔との間に隙間が存在しても、シリンダ
ヘツドカバー３を、シリンダヘツド１に対して吸
気弁用カム軸１０を介して常に正しい位置に取付
けすることができるから、シリンダヘツドカバー
３に取付く燃料デリバリ管１４と、シリンダヘツ
ド１の一側面における燃料噴射弁用装着孔９との
間における関係寸法のバラ付きを小さくできる。 In this way, the cylinder head 1 is molded with the bearing part 12 into which the lower half of the intake valve camshaft 10 fits, and the cylinder head cover 3 is molded with the bearing part 13 into which the upper half of the intake valve camshaft 10 is fitted. By configuring the intake valve camshaft 10 to be pivotally supported by these bearings 12 and 13, it is possible to fasten the cylinder head cover 3 to the cylinder head 1 with a plurality of bolts 4. Even if there is a gap between this bolt 4 and its bolt hole, the cylinder head cover 3 can always be attached to the cylinder head 1 in the correct position via the intake valve camshaft 10. Therefore, variations in the relative dimensions between the fuel delivery pipe 14 attached to the cylinder head cover 3 and the fuel injection valve mounting hole 9 on one side of the cylinder head 1 can be reduced.
その結果、燃料デリバリ管１４とシリンダヘツ
ド１における装着孔９との間に装着される燃料噴
射弁１５における軸線１５ａの傾きのずれを僅少
にできるのである。 As a result, the deviation in inclination of the axis 15a of the fuel injection valve 15 mounted between the fuel delivery pipe 14 and the mounting hole 9 in the cylinder head 1 can be made very small.
図面は本考案の実施例を示し、第１図は縦断正
面図、第２図は平面図、第３図は第２図の−
視断面図、第４図は第２図の−視断面図であ
る。
１……シリンダヘツド、２……燃焼室、３……
シリンダヘツドカバー、５……吸気ポート、６…
…排気ポート、７……吸気弁、８……排気弁、９
……燃料噴射弁用装着孔、１０，１１……カム
軸、１２、１３……軸受部、１４……燃料デリバ
リ管、１５……燃料噴射弁、１６……燃料デリバ
リ管取付け用ボス部、１７……ブラケツト、１８
……インシユレータ、１９……ボルト。
The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical front view, Fig. 2 is a plan view, and Fig. 3 is a view of -
FIG. 4 is a cross-sectional view taken along the line - in FIG. 2. 1... Cylinder head, 2... Combustion chamber, 3...
Cylinder head cover, 5... Intake port, 6...
...Exhaust port, 7...Intake valve, 8...Exhaust valve, 9
... Mounting hole for fuel injection valve, 10, 11 ... Camshaft, 12, 13 ... Bearing part, 14 ... Fuel delivery pipe, 15 ... Fuel injection valve, 16 ... Boss part for attaching fuel delivery pipe, 17...Bracket, 18
...Insulator, 19...volts.
Claims (1)
に、燃料噴射弁の装着孔を設ける一方、前記シリ
ンダヘツドの側面と略平行に配設した燃料デリバ
リ管と、前記各燃料噴射弁用装着孔との間に燃料
噴射弁を各々装着し、且つ、前記シリンダヘツド
の上面に、カム軸を覆うシリンダヘツドカバーを
着脱自在に締結して成る内燃機関において、前記
シリンダヘツドには、前記カム軸の下半分が嵌ま
る軸受部を、シリンダヘツドカバーには、前記カ
ム軸の上半分に被嵌する軸受部を各々造形して、
これら軸受部にてカム軸を軸支する一方、前記燃
料デリバリ管を、当該燃料デリバリ管に固着した
ブラケツトを介して前記シリンダヘツドカバーに
対して着脱可能に取付けたことを特徴とする燃料
デリバリ管付き内燃機関。 Mounting holes for fuel injection valves are provided at the locations of each cylinder on the side surface of the cylinder head, and between the fuel delivery pipe, which is disposed approximately parallel to the side surface of the cylinder head, and the mounting holes for each fuel injection valve. In an internal combustion engine in which fuel injection valves are respectively installed and a cylinder head cover covering a camshaft is removably fastened to the upper surface of the cylinder head, the lower half of the camshaft is fitted into the cylinder head. A round bearing part is formed on the cylinder head cover, and a bearing part that fits over the upper half of the camshaft is formed on the cylinder head cover.
A fuel delivery pipe characterized in that a camshaft is pivotally supported by these bearings, and the fuel delivery pipe is removably attached to the cylinder head cover via a bracket fixed to the fuel delivery pipe. Internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987033684U JPH053742Y2 (en) | 1987-03-06 | 1987-03-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987033684U JPH053742Y2 (en) | 1987-03-06 | 1987-03-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63140168U JPS63140168U (en) | 1988-09-14 |
| JPH053742Y2 true JPH053742Y2 (en) | 1993-01-28 |
Family
ID=30841522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987033684U Expired - Lifetime JPH053742Y2 (en) | 1987-03-06 | 1987-03-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH053742Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6081592A (en) * | 1983-10-13 | 1985-05-09 | トヨタ自動車株式会社 | Fuel injection type engine |
-
1987
- 1987-03-06 JP JP1987033684U patent/JPH053742Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6081592A (en) * | 1983-10-13 | 1985-05-09 | トヨタ自動車株式会社 | Fuel injection type engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63140168U (en) | 1988-09-14 |
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