JP2002221083A - Valve arm case for engine - Google Patents
Valve arm case for engineInfo
- Publication number
- JP2002221083A JP2002221083A JP2001016617A JP2001016617A JP2002221083A JP 2002221083 A JP2002221083 A JP 2002221083A JP 2001016617 A JP2001016617 A JP 2001016617A JP 2001016617 A JP2001016617 A JP 2001016617A JP 2002221083 A JP2002221083 A JP 2002221083A
- Authority
- JP
- Japan
- Prior art keywords
- valve arm
- fuel
- valve
- pipe
- case
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 claims abstract description 134
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 239000000295 fuel oil Substances 0.000 claims abstract description 11
- 230000035515 penetration Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000243 solution Substances 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 14
- 230000037431 insertion Effects 0.000 description 14
- 238000007789 sealing Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 102100033040 Carbonic anhydrase 12 Human genes 0.000 description 1
- 102100033007 Carbonic anhydrase 14 Human genes 0.000 description 1
- 101150000715 DA18 gene Proteins 0.000 description 1
- 101000867855 Homo sapiens Carbonic anhydrase 12 Proteins 0.000 description 1
- 101000867862 Homo sapiens Carbonic anhydrase 14 Proteins 0.000 description 1
- 102000003729 Neprilysin Human genes 0.000 description 1
- 108090000028 Neprilysin Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シリンダヘッドの
上方を覆うエンジンの弁腕ケースの構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a valve arm case of an engine which covers an upper part of a cylinder head.
【０００２】[0002]
【従来の技術】従来からエンジンには、シリンダヘッド
の上方に配設される弁腕ケースにより弁腕室が構成され
ており、例えば吸気弁及び排気弁をそれぞれ２弁具備す
る４弁式のエンジンの場合、該弁腕室内に、弁腕や燃料
噴射弁、及びプッシュロッドの上端部や吸排気弁の上端
部等を収納していた。燃料噴射弁には、外部から弁腕ケ
ースの側面を通じて弁腕室内に侵入する燃料配管が接続
され、燃料噴射弁へ高圧燃料を供給している。燃料配管
は、弁腕ケース内部に配置される内部配管と、弁腕ケー
ス外部に配置される外部配管とで構成されていた。弁腕
ケース側面には管継手が螺挿され、該内部配管及び外部
配管は、それぞれ該管継手に接続されていた。また、各
気筒毎に設けられる燃料噴射弁には、余剰燃料油を回収
するための燃料戻し管が接続されており、該燃料戻し管
は、弁腕ケースに螺挿される管継手を介して弁腕室外部
へ導かれていた。また、弁腕室内に配設される弁腕軸、
及び燃料噴射弁をシリンダヘッドに取付固定する取付部
材は、それぞれシリンダヘッド上面に固設される支持部
材により支持されていた。2. Description of the Related Art Conventionally, an engine has a valve arm chamber formed by a valve arm case disposed above a cylinder head. For example, a four-valve engine having two intake valves and two exhaust valves is provided. In this case, the valve arm, the fuel injection valve, the upper end of the push rod, the upper end of the intake / exhaust valve, and the like are housed in the valve arm chamber. The fuel injection valve is connected to a fuel pipe that enters the valve arm chamber from the outside through the side surface of the valve arm case, and supplies high-pressure fuel to the fuel injection valve. The fuel pipe was composed of an internal pipe arranged inside the valve arm case and an external pipe arranged outside the valve arm case. A pipe joint was screwed into the side surface of the valve arm case, and the internal pipe and the external pipe were each connected to the pipe joint. Further, a fuel return pipe for recovering excess fuel oil is connected to a fuel injection valve provided for each cylinder, and the fuel return pipe is connected via a pipe joint screwed into a valve arm case. He was led out of the arm chamber. A valve arm shaft disposed in the valve arm chamber;
The mounting member for mounting and fixing the fuel injection valve to the cylinder head is supported by a support member fixed on the upper surface of the cylinder head.
【０００３】[0003]
【発明が解決しようとする課題】前記燃料配管は、内部
配管及び外部配管を、弁腕ケース側面に螺挿される管継
手に接続して連結することで構成され、前記燃料戻し管
は弁腕ケースに螺挿される管継手を介して弁腕室外部へ
導かれていたので、該燃料配管及び燃料戻し管を構成す
るために、弁腕ケースに螺子溝加工を施すとともに、管
継手が必要となるため、加工工数及び部品点数が増加す
る原因となっていた。また、前記弁腕軸及び燃料噴射弁
の取付部材は、弁腕ケースとは別個に設けられシリンダ
ヘッド上面に固設された支持部材によりそれぞれ支持さ
れていたので、部品点数が増加することとなっていた。The fuel pipe is constituted by connecting and connecting an inner pipe and an outer pipe to a pipe joint screwed into a side surface of a valve arm case, and the fuel return pipe is connected to the valve arm case. Is guided to the outside of the valve arm chamber via a pipe joint screwed into the valve arm case. In order to form the fuel pipe and the fuel return pipe, the valve arm case is subjected to thread groove processing and a pipe joint is required. As a result, the number of processing steps and the number of parts are increased. In addition, since the valve arm shaft and the mounting member of the fuel injection valve are provided separately from the valve arm case and supported by the support members fixed to the upper surface of the cylinder head, the number of parts increases. I was
【０００４】[0004]
【課題を解決するための手段】本発明の解決しようとす
る課題は以上の如くであり、次に該課題を解決するため
の手段を説明する。即ち、請求項１においては、シリン
ダヘッドの上方に配置され、弁腕及び燃料噴射弁を収納
する弁腕ケースにおいて、該弁腕ケースに、燃料噴射弁
へ燃料油を供給する燃料配管を貫通させた。The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in the first aspect, in the valve arm case which is disposed above the cylinder head and houses the valve arm and the fuel injection valve, a fuel pipe for supplying fuel oil to the fuel injection valve is passed through the valve arm case. Was.
【０００５】また、請求項２においては、前記弁腕ケー
スに弁腕軸を支持する弁腕軸支持部を形成した。According to a second aspect of the present invention, a valve arm shaft supporting portion for supporting a valve arm shaft is formed in the valve arm case.
【０００６】また、請求項３においては、前記弁腕ケー
スに、燃料噴射弁のシリンダヘッドへの取付部材を支持
するための支持部を形成した。According to a third aspect of the present invention, a supporting portion for supporting a mounting member of the fuel injection valve to the cylinder head is formed in the valve arm case.
【０００７】また、請求項４においては、前記燃料噴射
弁からの余剰燃料を戻すための燃料戻し管を、シール部
材を介して、弁腕ケースに貫通させた。According to a fourth aspect of the present invention, a fuel return pipe for returning excess fuel from the fuel injection valve is passed through the valve arm case via a seal member.
【０００８】また、請求項５においては、前記弁腕ケー
スの燃料配管貫通部には、該燃料配管のシール部材が配
置され、該燃料配管貫通部に、該燃料配管貫通部とシー
ル部材との間に間隙を形成する切欠部を形成した。According to a fifth aspect of the present invention, a seal member for the fuel pipe is disposed in the fuel pipe penetration part of the valve arm case, and the fuel pipe penetration part and the seal member are provided in the fuel pipe penetration part. Notches forming gaps between them were formed.
【０００９】[0009]
【発明の実施の形態】次に、本発明の実施の形態を説明
する。図１は本発明の弁腕室を示す側面断面図、図２は
同じく平面図、図３は弁腕の取付部を示す平面、図４は
燃料噴射弁押えを示す斜視図、図５は高圧シール部材が
嵌装される挿通孔の切欠部を示す側面図、図６は燃料戻
し管の下部弁腕ケースの貫通部を示す側面断面図であ
る。Next, an embodiment of the present invention will be described. 1 is a side sectional view showing a valve arm chamber of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view showing a mounting portion of a valve arm, FIG. 4 is a perspective view showing a fuel injection valve presser, and FIG. FIG. 6 is a side sectional view showing a cutout portion of an insertion hole in which a seal member is fitted, and FIG. 6 is a side sectional view showing a through portion of a lower valve arm case of a fuel return pipe.
【００１０】本発明の弁腕ケース及び該弁腕ケースによ
り構成される弁腕室について説明する。図１、図２に示
すように、エンジンのシリンダヘッド１の上方には弁腕
ケース２が配設され、弁腕室５が構成されている。弁腕
ケース２は、上部弁腕ケース２ｂと下部弁腕ケース２ａ
とに分割して形成されている。The valve arm case of the present invention and the valve arm chamber constituted by the valve arm case will be described. As shown in FIGS. 1 and 2, a valve arm case 2 is disposed above a cylinder head 1 of an engine, and a valve arm chamber 5 is formed. The valve arm case 2 includes an upper valve arm case 2b and a lower valve arm case 2a.
And are formed separately.
【００１１】本実施例におけるエンジンは、例えば３気
筒に構成されており、各気筒毎に２つの吸気弁１６ａ・
１６ａ及び２つの排気弁１６ｂ・１６ｂが設けられる所
謂４弁式のエンジンである。また、エンジンはＯＨＶ式
に構成され、弁腕室５内には、前記吸気弁１６ａ・１６
ａ及び２つの排気弁１６ｂ・１６ｂの上端部、プッシュ
ロッド１３の上端部、弁腕１４、及び燃料噴射弁１７等
が配設されている。弁腕１４は弁腕室５内に設けられる
弁腕軸１１により揺動自在に支持されている。The engine according to the present embodiment is constituted, for example, by three cylinders, and has two intake valves 16a.
The engine is a so-called four-valve engine provided with an exhaust valve 16a and two exhaust valves 16b. The engine is of an OHV type, and the intake valves 16a and 16
a, the upper ends of the two exhaust valves 16b, 16b, the upper end of the push rod 13, the valve arm 14, the fuel injection valve 17, and the like. The valve arm 14 is swingably supported by a valve arm shaft 11 provided in the valve arm chamber 5.
【００１２】弁腕１４は、吸気弁１６ａ・１６ａ毎、及
び排気弁１６ｂ・１６ｂ毎に１つ設けられ、上下摺動す
るプッシュロッド１３により弁腕１４が揺動して、吸気
弁１６ａ・１６ａ、及び排気弁１６ｂ・１６ｂを、それ
ぞれ開閉するように構成されている。One valve arm 14 is provided for each of the intake valves 16a and 16a and each of the exhaust valves 16b and 16b, and the valve arm 14 is swung by a push rod 13 that slides up and down, so that the intake valves 16a and 16a , And the exhaust valves 16b, 16b are opened and closed, respectively.
【００１３】平面視における、吸気弁１６ａ・１６ａ及
び排気弁１６ｂ・１６ｂの配置位置の略中央には燃料噴
射弁１７が配設されており、該燃料噴射弁１７は、燃料
噴射弁押え１５により上方から押さえられて、その上下
方向の配設位置を固定されている。燃料噴射弁押え１５
は、弁腕軸１１により支持され、吸気弁１６ａ・１６ａ
用の弁腕１４と排気弁１６ｂ・１６ｂ用の弁腕１４との
間に配置されている。A fuel injection valve 17 is disposed substantially at the center of the arrangement of the intake valves 16a and 16a and the exhaust valves 16b and 16b in a plan view. It is pressed from above and its vertical position is fixed. Fuel injection valve presser 15
Are supported by the valve arm shaft 11, and the intake valves 16a
Between the valve arm 14 for the exhaust valve 16b and the valve arm 14 for the exhaust valve 16b.
【００１４】弁腕軸１１は、下部弁腕ケース２ａの側面
に形成される弁腕軸支持部２ｅにより、その両端部を支
持されるとともに、弁腕室５内におけるシリンダヘッド
１の上面に固設される弁腕軸支持部材７により、その途
中部を支持されている。そして、下部弁腕ケース２ａを
シリンダヘッド１に組み付ける際には、弁腕１４、燃料
噴射弁押え１４、及び弁腕軸支持部材７が嵌装された弁
腕軸１１を、前もって弁腕軸支持部２ｅにより支持して
該下部弁腕ケース２ａに組み付けたアッセンブリ状態
で、シリンダヘッド１に組み付けるようにしている。The valve arm shaft 11 is supported at both ends by a valve arm shaft supporting portion 2e formed on the side surface of the lower valve arm case 2a, and is fixed to the upper surface of the cylinder head 1 in the valve arm chamber 5. The valve arm shaft support member 7 is provided to support the middle part thereof. When assembling the lower valve arm case 2a to the cylinder head 1, the valve arm shaft 11, on which the valve arm 14, the fuel injection valve presser 14, and the valve arm shaft supporting member 7 are fitted, is previously supported by the valve arm shaft. The lower valve arm case 2a is supported by the portion 2e and assembled to the cylinder head 1 in an assembled state.
【００１５】このように、下部弁腕ケース２ａの側面に
弁腕軸支持部２ｅを形成することで、該下部弁腕ケース
２ａを、弁腕１４、燃料噴射弁押え１４、及び弁腕軸支
持部材７が嵌装される弁腕軸１１を組み付けたアッセン
ブリ状態でシリンダヘッド１に組み付けることができる
こととなり、組立工程の削減及び組立性の向上を図るこ
とができる。加えて、シリンダヘッド１に固設される弁
腕軸支持部材７の数を減らすことができ、部品点数の減
少を図ることもできる。As described above, by forming the valve arm shaft supporting portion 2e on the side surface of the lower valve arm case 2a, the lower valve arm case 2a can be connected to the valve arm 14, the fuel injection valve presser 14, and the valve arm shaft support. The valve arm shaft 11 to which the member 7 is fitted can be assembled to the cylinder head 1 in an assembled state, so that an assembling process can be reduced and assemblability can be improved. In addition, the number of valve arm shaft support members 7 fixed to the cylinder head 1 can be reduced, and the number of parts can be reduced.
【００１６】図３には、弁腕１４・１４の弁腕軸１１へ
の取付部を示しており、吸気弁１６ａ・１６ａを開閉す
る弁腕１４及び排気弁１６ｂ・１６ｂを開閉する弁腕１
４は、各気筒毎に配置される弁腕軸支持部材７・７の間
に配設されている。該吸気弁１６ａ・１６ａ用の弁腕１
４と排気弁１６ｂ・１６ｂ用の弁腕１４との間には、燃
料噴射弁押さえ１５が配設されている。また、弁腕軸支
持部材７と各弁腕１４との間には、弁腕軸１１に嵌装さ
れるウェーブワッシャ等の付勢部材３５が介装されてお
り、該付勢部材３５により弁腕１４が燃料噴射弁押さえ
１５側へ付勢され、該燃料噴射弁押さえ１５に当接して
いる。FIG. 3 shows a mounting portion of the valve arms 14, 14 to the valve arm shaft 11. The valve arm 14 opens and closes the intake valves 16a, 16a and the valve arm 1 opens and closes the exhaust valves 16b, 16b.
Reference numeral 4 is provided between the valve arm shaft support members 7, 7 arranged for each cylinder. Valve arm 1 for intake valves 16a
A fuel injection valve retainer 15 is disposed between the fuel cell 4 and the valve arm 14 for the exhaust valves 16b. An urging member 35 such as a wave washer fitted to the valve arm shaft 11 is interposed between the valve arm shaft support member 7 and each valve arm 14. The arm 14 is urged toward the fuel injection valve retainer 15 and is in contact with the fuel injection valve retainer 15.
【００１７】即ち、弁腕軸支持部材７・７間の寸法ｄｘ
を、吸気弁１６ａ・１６ａ用の弁腕１４の幅寸法、排気
弁１６ｂ・１６ｂ用の弁腕１４の幅寸法、及び燃料噴射
弁押さえ１５の幅寸法ｄｐを加えた値よりも、若干大き
く余裕を持たせて構成して、弁腕１４や燃料噴射弁押さ
え１５の組付性を向上させている。そして、弁腕軸支持
部材７と弁腕１４との間隙を埋めて弁腕１４のブレを抑
えるために、付勢部材３５をスペーサー的に介装してい
る。また、弁腕軸１１に組み付けられた吸気弁１６ａ・
１６ａ用の弁腕１４と排気弁１６ｂ・１６ｂ用の弁腕１
４との間の間隔は、吸気弁１６ａと排気弁１６ｂとの間
の寸法ｄａに合わせて構成されている。That is, the dimension dx between the valve arm shaft support members 7, 7
Is slightly larger than the value obtained by adding the width of the valve arm 14 for the intake valves 16a, 16a, the width of the valve arm 14 for the exhaust valves 16b, 16b, and the width dp of the fuel injection valve retainer 15. To improve the assemblability of the valve arm 14 and the fuel injection valve retainer 15. In order to fill the gap between the valve arm shaft support member 7 and the valve arm 14 to suppress the movement of the valve arm 14, the urging member 35 is interposed as a spacer. In addition, the intake valves 16a and
Valve arm 14 for 16a and valve arm 1 for exhaust valves 16b and 16b
4 is configured to match the dimension da between the intake valve 16a and the exhaust valve 16b.
【００１８】このように、燃料噴射弁押え１５は、該燃
料噴射弁押え１５の支持部材としても作用する弁腕軸１
１を介して、下部弁腕ケース２ａに支持されているの
で、別個に燃料噴射弁押え１５の支持部材を弁腕室５内
に設ける必要がなく、部品点数の削減及び燃料噴射弁押
え１５の配置スペースの減少を図ることができる。ま
た、弁腕軸１１にて支持するように構成した燃料噴射弁
押え１５は、図４に示すように、薄板状部材の両端部を
屈曲して支持部１５ａを形成するとともに、平面部１５
ｂに燃料噴射弁１７を押圧する弁押え用孔１５ｃ、及び
燃料噴射弁押え１５を固定するための固定用孔１５ｄ
を、形成しただけの簡単な構成とすることができるの
で、板金部材により形成することが可能であり、低コス
ト化を図ることができる。As described above, the fuel injection valve presser 15 is provided on the valve arm shaft 1 which also functions as a support member for the fuel injection valve presser 15.
1, it is not necessary to separately provide a support member for the fuel injection valve presser 15 in the valve arm chamber 5 because the lower valve arm case 2a supports the fuel injection valve presser 15. The arrangement space can be reduced. Further, as shown in FIG. 4, the fuel injection valve presser 15 configured to be supported by the valve arm shaft 11 bends both ends of the thin plate member to form the support portion 15a and the flat portion 15a.
b, a valve holding hole 15c for pressing the fuel injector 17 and a fixing hole 15d for fixing the fuel injector 15
Can be formed by a simple structure just formed, so that it can be formed by a sheet metal member, and cost reduction can be achieved.
【００１９】弁腕室５内に配置される燃料噴射弁１７に
は、外部から弁腕室５内に侵入する燃料配管２１が接続
され、高圧燃料が供給されている。燃料配管２１は、弁
腕室５内部に配設される内部配管２１ａ、弁腕室５外部
に配設される外部配管２１ｂ、及び該内部配管２１ａと
外部配管２１ｂとを接続する高圧シール部材２２により
構成されている。下部弁腕ケース２ａの側面には挿通孔
２ｄが形成され、該挿通孔２ｄを燃料配管２１が貫通し
ている。該挿通孔２ｄの部分には、前記高圧シール部材
２２が位置して、該挿通孔２ｄに抜脱自在に嵌装されて
いる。The fuel injection valve 17 disposed in the valve arm chamber 5 is connected to a fuel pipe 21 which enters the valve arm chamber 5 from the outside, and is supplied with high-pressure fuel. The fuel pipe 21 includes an internal pipe 21a provided inside the valve arm chamber 5, an external pipe 21b provided outside the valve arm chamber 5, and a high-pressure seal member 22 connecting the internal pipe 21a and the external pipe 21b. It consists of. An insertion hole 2d is formed in a side surface of the lower valve arm case 2a, and the fuel pipe 21 penetrates the insertion hole 2d. The high-pressure seal member 22 is located in the insertion hole 2d, and is removably fitted in the insertion hole 2d.
【００２０】このように、下部弁腕ケース２ａの側面
に、燃料配管２１が貫通する挿通孔２ｄを形成すること
で、該下部弁腕ケース２ａの側面部分に外部配管２１ｂ
と内部配管２１ａとを接続するための管継手を螺装する
必要がなく、下部弁腕ケース２ａに組み付けを行う部品
点数を削減することができる。また、下部弁腕ケース２
ａに螺子加工を行う必要がないので、該下部弁腕ケース
２ａが簡単な形状となり加工工数を削減することができ
る。さらに、燃料配管２１は、外部配管２１ｂと内部配
管２１ａとを高圧シール部材２２によりシール接続して
構成しており、該燃料配管２１単独でシールされている
ので、燃料漏れに対する信頼性を向上させることができ
る。As described above, by forming the insertion hole 2d through which the fuel pipe 21 penetrates in the side surface of the lower valve arm case 2a, the external pipe 21b is formed in the side surface of the lower valve arm case 2a.
There is no need to screw a pipe joint for connecting the internal pipe 21a to the inner pipe 21a, and the number of parts to be assembled to the lower valve arm case 2a can be reduced. In addition, lower valve arm case 2
Since there is no need to perform threading on a, the lower valve arm case 2a has a simple shape and the number of processing steps can be reduced. Further, the fuel pipe 21 is formed by sealingly connecting the external pipe 21b and the internal pipe 21a with a high-pressure seal member 22. Since the fuel pipe 21 is sealed by itself, the reliability against fuel leakage is improved. be able to.
【００２１】また、図１、図５に示すように、高圧シー
ル部材２２が嵌装される挿通孔２ｄの外部側端の周縁部
には、切欠部２ｆを形成している。弁腕室５内のメンテ
ナンス等を行う際には、高圧シール部材２２を挿通孔２
ｄから取り外すことがあるが、挿通孔２ｄに高圧シール
部材２２を嵌装した状態では、挿通孔２ｄの外部側端と
高圧シール部材２２とが密着した状態となっているた
め、そのままでは該高圧シール部材２２を取り外す作業
が行いにくく作業性が悪くなる。従って、本下部弁腕ケ
ース２ａにおいては、挿通孔２ｄの外部側端の周縁部に
切欠部２ｆを形成し、高圧シール部材２２を取り外すと
きに、該切欠部２ｆへ工具を差し込んでこじる等して、
高圧シール部材２２を挿通孔２ｄから若干抜き出すとい
ったような前作業を行うことができるようにして、作業
性の向上を図っている。As shown in FIGS. 1 and 5, a notch 2f is formed at the outer peripheral end of the insertion hole 2d in which the high-pressure seal member 22 is fitted. When performing maintenance or the like in the valve arm chamber 5, the high-pressure seal member 22 is inserted into the insertion hole 2.
However, when the high-pressure seal member 22 is fitted in the insertion hole 2d, the outer end of the insertion hole 2d and the high-pressure seal member 22 are in close contact with each other. The work of removing the seal member 22 is difficult to perform, and the workability deteriorates. Therefore, in the lower valve arm case 2a, a notch 2f is formed at the outer peripheral end of the insertion hole 2d, and when the high-pressure seal member 22 is removed, a tool is inserted into the notch 2f and prying is performed. hand,
Workability is improved by performing a preparatory operation such as slightly extracting the high-pressure seal member 22 from the insertion hole 2d.
【００２２】また、前記軸支持部材７には、上方からボ
ルト部材３１が螺挿されており、該ボルト部材３１の上
部は弁腕軸支持部材７の上方に突出している。弁腕軸支
持部材７は、例えば、各気筒間毎に配置されている。前
記上部弁腕ケース２ｂにおける、弁腕軸支持部材７の配
設位置に対応する箇所には固定用孔２ｃが形成され、該
固定用孔２ｃには上部弁腕ケース２ｂの上方から固定用
ナット３２が挿入されている。該固定用ナット３２は前
記ボルト部材３１の上部に螺嵌されている。A bolt member 31 is screwed into the shaft support member 7 from above, and an upper portion of the bolt member 31 projects above the valve arm shaft support member 7. The valve arm shaft support member 7 is disposed, for example, between each cylinder. In the upper valve arm case 2b, a fixing hole 2c is formed at a position corresponding to the disposition position of the valve arm shaft support member 7, and a fixing nut is formed in the fixing hole 2c from above the upper valve arm case 2b. 32 has been inserted. The fixing nut 32 is screwed onto an upper portion of the bolt member 31.
【００２３】そして、ボルト部材３１に螺挿される固定
用ナット３２を締め付けることで、固定用孔２ｃの周縁
部に係止する該固定用ナット３２のつば部３２ａが、上
部弁腕ケース２ｂを下方に押圧し、これにより、該上部
弁腕ケース２ｂ及び上部弁腕ケース２ｂの下方に配置さ
れる下部弁腕ケース２ａがシリンダヘッド１に取付固定
されている。即ち、弁腕軸支持部材７に螺挿されるボル
ト部材３１に固定用ナット３２を締結することで、該固
定用ナット３２により下方押圧される上部弁腕ケース２
ｂを介して、下部弁腕ケース２ａがシリンダヘッド１に
取付固定されている。When the fixing nut 32 screwed into the bolt member 31 is tightened, the flange 32a of the fixing nut 32 which is locked to the peripheral edge of the fixing hole 2c moves the upper valve arm case 2b downward. Accordingly, the lower valve arm case 2a disposed below the upper valve arm case 2b and the upper valve arm case 2b is fixed to the cylinder head 1. That is, by fastening the fixing nut 32 to the bolt member 31 that is screwed into the valve arm shaft support member 7, the upper valve arm case 2 pressed downward by the fixing nut 32.
The lower valve arm case 2a is attached and fixed to the cylinder head 1 via b.
【００２４】また、図２に示すように、各気筒の燃料噴
射弁１７は、燃料戻し管２３により互いに接続されてお
り、余分な燃料油を該燃料戻し管２３を通じて燃料タン
ク側へ戻すように構成している。図６に示すように、該
燃料戻し管２３は、下部弁腕ケース２ａの側面に形成さ
れる燃料戻し口２ｇを通じて弁腕室５外部へ案内されて
いる。As shown in FIG. 2, the fuel injection valves 17 of the respective cylinders are connected to each other by a fuel return pipe 23 so that excess fuel oil is returned to the fuel tank through the fuel return pipe 23. Make up. As shown in FIG. 6, the fuel return pipe 23 is guided to the outside of the valve arm chamber 5 through a fuel return port 2g formed on a side surface of the lower valve arm case 2a.
【００２５】燃料戻し口２ｇにおいて、燃料戻し管２３
は外部戻し管２４と接続されており、該外部戻し管２４
を介して燃料戻し口２ｇを貫通している。燃料戻し管２
３は鋼管等により構成され、外部戻し管２４はゴムや樹
脂等の弾性を有するホース状部材により構成されてい
る。即ち、燃料戻し口２ｇを貫通する燃料戻し管２３と
該燃料戻し口２ｇとの間に外部戻し管２４が圧縮状態で
介装されて、該外部戻し管２４と燃料戻し管２３とが接
続されるとともに、該燃料戻し管２３と燃料戻し口２ｇ
との間隙をシールしている。At the fuel return port 2g, a fuel return pipe 23
Is connected to the external return pipe 24,
Through the fuel return port 2g. Fuel return pipe 2
Reference numeral 3 denotes a steel pipe or the like, and the external return pipe 24 is formed of an elastic hose-shaped member such as rubber or resin. That is, the external return pipe 24 is interposed in a compressed state between the fuel return pipe 23 penetrating the fuel return port 2g and the fuel return port 2g, and the external return pipe 24 and the fuel return pipe 23 are connected. And the fuel return pipe 23 and the fuel return port 2g.
To seal the gap.
【００２６】このように、燃料戻し管２３と燃料戻し口
２ｇ部分にて接続される外部戻し管２４は、燃料戻し管
２３からの余剰燃料油を弁腕室５外部へ案内するホース
部材であるとともに、燃料戻し管２３と燃料戻し口２ｇ
との間隙をシールするシール部材としても機能してい
る。そして、燃料戻し管２３及び外部戻し管２４といっ
た余剰燃料油を戻すための配管は、燃料戻し口２ｇを通
じて下部弁腕ケース２ａの側面を貫通することとなって
いる。尚、燃料戻し口２ｇ部分における燃料戻し管２３
の外周には環状突起２３ａ・２３ａを、外部戻し管２４
との接続の抜け止めとして形成している。As described above, the external return pipe 24 connected to the fuel return pipe 23 at the fuel return port 2g is a hose member for guiding excess fuel oil from the fuel return pipe 23 to the outside of the valve arm chamber 5. With fuel return pipe 23 and fuel return port 2g
It also functions as a sealing member that seals the gap between them. The pipes for returning the excess fuel oil, such as the fuel return pipe 23 and the external return pipe 24, pass through the side surface of the lower valve arm case 2a through the fuel return port 2g. The fuel return pipe 23 at the fuel return port 2g portion
Annular projections 23a on the outer periphery of the
It is formed as a stopper for connection with the cable.
【００２７】このように、燃料噴射弁１７からの余剰燃
料を戻すための燃料戻し管２３及び外部戻し管２４を、
シール部材としても機能する外部戻し管２４を介して、
下部弁腕ケース２ａの側面を貫通させることで、燃料戻
し管２３からの余剰燃料油を外部へ導くために、該下部
弁腕ケース２ａの側面部分に管継手を螺装する必要がな
く、下部弁腕ケース２ａに組み付けを行う部品点数を削
減することができる。また、下部弁腕ケース２ａに螺子
加工を行う必要がないので、該下部弁腕ケース２ａが簡
単な形状となり加工工数を削減することができる。さら
に、燃料戻し管２３と接続される外部戻し管２４は、シ
ール部材も兼ねているので、該燃料戻し管２３と外部戻
し管２４との接続部からの燃料漏れに対する信頼性を向
上させることができる。As described above, the fuel return pipe 23 and the external return pipe 24 for returning excess fuel from the fuel injection valve 17 are
Via an external return pipe 24 which also functions as a sealing member,
By penetrating the side surface of the lower valve arm case 2a, it is not necessary to screw a pipe joint on the side surface portion of the lower valve arm case 2a in order to guide excess fuel oil from the fuel return pipe 23 to the outside. The number of parts to be assembled to the valve arm case 2a can be reduced. Further, since it is not necessary to perform screw processing on the lower valve arm case 2a, the lower valve arm case 2a has a simple shape and the number of processing steps can be reduced. Further, since the external return pipe 24 connected to the fuel return pipe 23 also serves as a sealing member, it is possible to improve the reliability of fuel leakage from the connection between the fuel return pipe 23 and the external return pipe 24. it can.
【００２８】[0028]
【発明の効果】本発明は以上の如く構成したので、次の
ような効果を奏するのである。即ち、請求項１記載の如
く、弁腕ケースに、燃料噴射弁へ燃料油を供給する燃料
配管を貫通させたので、弁腕ケースの側面部分等に弁腕
室外部の燃料配管と弁腕室内部の燃料配管とを接続する
ための管継手を螺装する必要がなく、弁腕ケースに組み
付けを行う部品点数を削減することができる。また、弁
腕ケースに螺子加工を行う必要がないので、該弁腕ケー
スが簡単な形状となり加工工数を削減することができ
る。さらに、燃料配管は、外部の燃料配管と内部の燃料
配管とを高圧シール部材によりシール接続して構成する
ことで、該燃料配管単独でその接続部をシールするよう
に構成することができるので、燃料漏れに対する信頼性
を向上させることができる。As described above, the present invention has the following advantages. That is, since the fuel pipe for supplying the fuel oil to the fuel injection valve is penetrated through the valve arm case as described in claim 1, the fuel pipe and the valve arm chamber outside the valve arm chamber are provided on a side portion of the valve arm case or the like. There is no need to screw a pipe joint for connecting to the internal fuel pipe, and the number of parts to be assembled to the valve arm case can be reduced. In addition, since it is not necessary to perform screw processing on the valve arm case, the valve arm case has a simple shape and the number of processing steps can be reduced. Furthermore, the fuel pipe can be configured such that the fuel pipe alone seals the connection portion by sealingly connecting the external fuel pipe and the internal fuel pipe with a high-pressure seal member. The reliability against fuel leakage can be improved.
【００２９】さらに、請求項２記載の如く、前記弁腕ケ
ースに弁腕軸を支持する弁腕軸支持部を形成したので、
該弁腕ケースを、弁腕、燃料噴射弁押え、及び弁腕軸支
持部材等の構成部材が嵌装される弁腕軸を組み付けたア
ッセンブリ状態でシリンダヘッドに組み付けることがで
きることとなり、組立工程の削減及び組立性の向上を図
ることができる。加えて、シリンダヘッドに固設される
弁腕軸支持部材の数を減らすことができ、部品点数の減
少を図ることもできる。Further, the valve arm case is formed with a valve arm shaft supporting portion for supporting the valve arm shaft.
The valve arm case can be assembled to the cylinder head in an assembled state in which components such as a valve arm, a fuel injection valve presser, and a valve arm shaft support member are fitted to the cylinder head. Reduction and improvement in assemblability can be achieved. In addition, the number of valve arm shaft support members fixed to the cylinder head can be reduced, and the number of parts can be reduced.
【００３０】さらに、請求項３記載の如く、前記弁腕ケ
ースに、燃料噴射弁のシリンダヘッドへの取付部材を支
持するための支持部を形成したので、別個に燃料噴射弁
押えの支持部材を弁腕室内に設ける必要がなく、部品点
数の削減及び燃料噴射弁押えの配置スペースの減少を図
ることができる。また、弁腕軸にて支持するように構成
した燃料噴射弁押えは、簡単な構成とすることができる
ので、板金部材により形成することが可能であり、低コ
スト化を図ることができる。Further, since a supporting portion for supporting a mounting member of the fuel injection valve to the cylinder head is formed in the valve arm case, a supporting member for the fuel injection valve presser is separately provided. There is no need to provide the valve arm inside the valve arm chamber, so that the number of parts can be reduced and the space for disposing the fuel injection valve retainer can be reduced. Further, since the fuel injection valve retainer configured to be supported by the valve arm shaft can have a simple configuration, it can be formed by a sheet metal member, and cost reduction can be achieved.
【００３１】さらに、請求項４記載の如く、前記燃料噴
射弁からの余剰燃料を戻すための燃料戻し管を、シール
部材を介して、弁腕ケースに貫通させたので、燃料戻し
管からの余剰燃料油を外部へ導くために、該弁腕ケース
の側面部分に管継手を螺装する必要がなく、弁腕ケース
に組み付けを行う部品点数を削減することができる。ま
た、弁腕ケースに螺子加工を行う必要がないので、該弁
腕ケースが簡単な形状となり加工工数を削減することが
できる。さらに、燃料戻し管をシール部材を介して弁腕
ケースに貫通させることで、該燃料戻し管の接続部から
の燃料漏れに対する信頼性を向上させることができる。Further, the fuel return pipe for returning the surplus fuel from the fuel injection valve is passed through the valve arm case via the sealing member, so that the excess fuel from the fuel return pipe is provided. In order to guide the fuel oil to the outside, there is no need to screw a pipe joint on the side surface portion of the valve arm case, and the number of parts to be assembled to the valve arm case can be reduced. In addition, since it is not necessary to perform screw processing on the valve arm case, the valve arm case has a simple shape and the number of processing steps can be reduced. Further, by penetrating the fuel return pipe through the valve arm case via the seal member, it is possible to improve the reliability with respect to fuel leakage from the connection portion of the fuel return pipe.
【００３２】さらに、請求項５記載の如く、前記弁腕ケ
ースの燃料配管貫通部には、該燃料配管のシール部材が
配置され、該燃料配管貫通部に、該燃料配管貫通部とシ
ール部材との間に間隙を形成する切欠部を形成したの
で、該シール部材を取り外すときに、該切欠部へ工具を
差し込んでこじる等して、燃料配管貫通部に嵌装される
シール部材を、該燃料配管貫通部から若干抜き出すとい
ったような前作業を行うことができるようにして、作業
性の向上を図ることができる。Further, as set forth in claim 5, a seal member for the fuel pipe is disposed in the fuel pipe penetration part of the valve arm case, and the fuel pipe penetration part and the seal member are provided in the fuel pipe penetration part. When the seal member is removed, a tool is inserted into the notch and prying to remove the seal member. Workability can be improved by performing a preparatory operation such as slightly withdrawing from the pipe penetration portion.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の弁腕室を示す側面断面図である。FIG. 1 is a side sectional view showing a valve arm chamber of the present invention.
【図２】同じく平面図である。FIG. 2 is a plan view of the same.
【図３】弁腕の取付部を示す平面図である。FIG. 3 is a plan view showing a mounting portion of the valve arm.
【図４】燃料噴射弁押えを示す斜視図である。FIG. 4 is a perspective view showing a fuel injection valve presser.
【図５】高圧シール部材が嵌装される挿通孔の切欠部を
示す側面図である。FIG. 5 is a side view showing a cutout portion of an insertion hole into which a high-pressure seal member is fitted.
【図６】燃料戻し管の下部弁腕ケースの貫通部を示す側
面断面図である。FIG. 6 is a side sectional view showing a through portion of a lower valve arm case of a fuel return pipe.
１ シリンダヘッド ２ 弁腕ケース ２ａ 下部弁腕ケース ２ｄ 挿通孔 ２ｅ 弁腕軸支持部 ２ｆ 切欠部 ５ 弁腕室 ７ 弁腕軸支持部材 １１ 弁腕軸 １４ 弁腕 １５ 燃料噴射弁押さえ １７ 燃料噴射弁 ２２ 高圧シール部材 ２３ 燃料戻し管 ２４ 外部戻し管 DESCRIPTION OF SYMBOLS 1 Cylinder head 2 Valve arm case 2a Lower valve arm case 2d Insertion hole 2e Valve arm shaft support part 2f Notch part 5 Valve arm chamber 7 Valve arm shaft support member 11 Valve arm shaft 14 Valve arm 15 Fuel injection valve press 17 Fuel injection valve 22 High pressure seal member 23 Fuel return pipe 24 External return pipe
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０２Ｍ 55/02 ３５０ Ｆ０２Ｍ 55/02 ３５０Ｆ ３５０Ｕ ３５０Ｚ Ｆターム(参考） 3G016 AA05 AA12 AA19 BA03 BA06 BA27 BB12 BB19 BB26 CA02 CA12 CA14 CA17 CA27 CA37 CA51 EA13 FA27 FA39 FA40 GA00 GA01 3G024 AA72 AA74 BA20 DA02 DA06 DA08 DA18 FA08 FA14 3G066 AA07 AB02 AD12 BA36 BA55 BA56 BA61 BA67 CB01 CB03 CB16 CC01 CD04 CD10 CD17──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F02M 55/02 350 F02M 55/02 350F 350U 350Z F-term (Reference) 3G016 AA05 AA12 AA19 BA03 BA06 BA27 BB12 BB19 BB26 CA02 CA12 CA14 CA17 CA27 CA37 CA51 EA13 FA27 FA39 FA40 GA00 GA01 3G024 AA72 AA74 BA20 DA02 DA06 DA08 DA18 FA08 FA14 3G066 AA07 AB02 AD12 BA36 BA55 BA56 BA61 BA67 CB01 CB03 CB16 CC01 CD04 CD10 CD17
Claims (5)
及び燃料噴射弁を収納する弁腕ケースにおいて、該弁腕
ケースに、燃料噴射弁へ燃料油を供給する燃料配管を貫
通させたことを特徴とするエンジンの弁腕ケース。In a valve arm case which is disposed above a cylinder head and houses a valve arm and a fuel injection valve, a fuel pipe for supplying fuel oil to the fuel injection valve is passed through the valve arm case. Characteristic engine valve arm case.
軸支持部を形成したことを特徴とする請求項１に記載の
エンジンの弁腕ケース。2. A valve arm case for an engine according to claim 1, wherein a valve arm shaft support portion for supporting a valve arm shaft is formed in said valve arm case.
ダヘッドへの取付部材を支持するための支持部を形成し
たことを特徴とする請求項１に記載のエンジンの弁腕ケ
ース。3. The valve arm case for an engine according to claim 1, wherein a support portion for supporting a mounting member of the fuel injection valve to the cylinder head is formed in the valve arm case.
めの燃料戻し管を、シール部材を介して、弁腕ケースに
貫通させたことを特徴とする請求項１に記載のエンジン
の弁腕ケース。4. The valve arm of an engine according to claim 1, wherein a fuel return pipe for returning surplus fuel from the fuel injection valve is passed through a valve arm case via a seal member. Case.
該燃料配管のシール部材が配置され、該燃料配管貫通部
に、該燃料配管貫通部とシール部材との間に間隙を形成
する切欠部を形成したことを特徴とする請求項１に記載
のエンジンの弁腕ケース。5. A fuel pipe penetration part of the valve arm case,
2. The engine according to claim 1, wherein a seal member for the fuel pipe is disposed, and a cutout portion is formed in the fuel pipe penetrating portion to form a gap between the fuel pipe penetrating portion and the seal member. Valve arm case.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001016617A JP4456282B2 (en) | 2001-01-25 | 2001-01-25 | Engine valve arm case |
| KR1020037009623A KR100847057B1 (en) | 2001-01-25 | 2002-01-21 | Fuel injection nozzle of engine |
| EP02715856A EP1355055B1 (en) | 2001-01-25 | 2002-01-21 | Fuel injection nozzle of engine |
| CNB028041135A CN1272537C (en) | 2001-01-25 | 2002-01-21 | Fuelinjection nozzle of engine |
| DE60217064T DE60217064T2 (en) | 2001-01-25 | 2002-01-21 | FUEL INJECTION NOZZLE |
| PCT/JP2002/000397 WO2002059472A1 (en) | 2001-01-25 | 2002-01-21 | Fuel injection nozzle of engine |
| US10/626,568 US7178508B2 (en) | 2001-01-25 | 2003-07-25 | Fuel injection nozzle of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001016617A JP4456282B2 (en) | 2001-01-25 | 2001-01-25 | Engine valve arm case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002221083A true JP2002221083A (en) | 2002-08-09 |
| JP4456282B2 JP4456282B2 (en) | 2010-04-28 |
Family
ID=18882954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001016617A Expired - Fee Related JP4456282B2 (en) | 2001-01-25 | 2001-01-25 | Engine valve arm case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4456282B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005033974B4 (en) * | 2004-08-05 | 2009-05-07 | General Motors Corp., Detroit | Rocker arm securing and arrangement |
| WO2010125948A1 (en) * | 2009-04-30 | 2010-11-04 | ヤンマー株式会社 | Engine |
| JP2010261323A (en) * | 2009-04-30 | 2010-11-18 | Yanmar Co Ltd | Head cover structure of engine |
-
2001
- 2001-01-25 JP JP2001016617A patent/JP4456282B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005033974B4 (en) * | 2004-08-05 | 2009-05-07 | General Motors Corp., Detroit | Rocker arm securing and arrangement |
| WO2010125948A1 (en) * | 2009-04-30 | 2010-11-04 | ヤンマー株式会社 | Engine |
| JP2010261323A (en) * | 2009-04-30 | 2010-11-18 | Yanmar Co Ltd | Head cover structure of engine |
| CN102414427A (en) * | 2009-04-30 | 2012-04-11 | 洋马株式会社 | Engine |
| US8915229B2 (en) | 2009-04-30 | 2014-12-23 | Yanmar Co., Ltd. | Engine |
| EP2426341A4 (en) * | 2009-04-30 | 2015-12-16 | Yanmar Co Ltd | Engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4456282B2 (en) | 2010-04-28 |
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