JPH02181013A - Engine brake having throttle valve equipped at cylinder head of internal combustion engine - Google Patents
Engine brake having throttle valve equipped at cylinder head of internal combustion engineInfo
- Publication number
- JPH02181013A JPH02181013A JP1296314A JP29631489A JPH02181013A JP H02181013 A JPH02181013 A JP H02181013A JP 1296314 A JP1296314 A JP 1296314A JP 29631489 A JP29631489 A JP 29631489A JP H02181013 A JPH02181013 A JP H02181013A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- cylinder head
- throttle valve
- recess
- engine
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 235000001674 Agaricus brunnescens Nutrition 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の排気通路に接続される弁開口が、
シリンダヘッド底部にある弁座と共にシリンダヘッド底
部の燃焼室側表面に対してずれて凹所の底に設けられて
いる、内燃機関のシリンダヘッドに設けられて弁開口を
制御する絞り弁を持つエンジンブレーキに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method in which a valve opening connected to an exhaust passage of an internal combustion engine is
An engine that has a throttle valve that is installed in the cylinder head of an internal combustion engine and controls the valve opening, which is provided at the bottom of a recess that is offset from the combustion chamber side surface of the bottom of the cylinder head together with the valve seat at the bottom of the cylinder head. Regarding brakes.
このような絞り弁を持つエンジンブレーキはドイツ連邦
共和国特許出願公開力３４２８６２６号明細書から公知
である。シリンダヘッドに垂れ下るように組込まれる絞
り弁はきのこ弁で、シリンダヘッド底部にあってこの弁
により制御される弁開口を経て、エンジンブレーキ辻斬
の際シリンダ内で圧縮されるガスが排気通路へ押出され
る。圧油又は圧縮空気の作用を受けて絞り弁を制御する
制動ピストンは、シリンダヘッドの制御穴内に案内され
て、弁棒上に載っている。An engine brake with such a throttle valve is known from German Patent Application No. 3,428,626. The throttle valve that hangs down from the cylinder head is a mushroom valve, and the gas compressed in the cylinder during engine braking is pushed out into the exhaust passage through the valve opening controlled by this valve located at the bottom of the cylinder head. be done. A brake piston, which controls the throttle valve under the action of pressure oil or compressed air, is guided in a control hole in the cylinder head and rests on the valve stem.
燃焼室の方へ開く弁とピストンとの＆触を回避するため
、弁座を持つ弁開口はシリンダヘッド底部の凹所内にお
いてシリンダヘッド底部表面に対してずれて設けられて
いる。In order to avoid contact between the valve that opens into the combustion chamber and the piston, the valve opening with its valve seat is arranged in a recess in the bottom of the cylinder head and offset relative to the bottom surface of the cylinder head.
燃料消費率及び排気カス汚染上の理由から、凹所は小さ
くされている。従って弁頭と凹所との間には比較的狭い
環状間隙が生じ、弁の開く際この間隙を通ってガスを押
出さねはならない。For reasons of fuel consumption and exhaust gas contamination, the recess is kept small. A relatively narrow annular gap is therefore created between the valve head and the recess, through which gas must not be forced during opening of the valve.
このため弁頭の範囲において流れの強い転向又は流れの
くびれが生じ、それにより特に上死点範囲において開放
力に打勝って弁を衝繋的に開−位置へ動かすほど高いガ
ス力が弁に生ずる可能性かある。この渦程はエンジンブ
レーキ出力を低下し、関係するｓ造素子に望ましくない
大きい機械的応力を生する。This results in a strong flow diversion or flow constriction in the region of the valve head, whereby gas forces on the valve are so high that they overcome the opening force and force the valve into the open position, especially in the region of top dead center. There is a possibility that this may occur. This vortex reduces engine braking power and creates undesirably high mechanical stresses in the associated structural elements.
〔発明が解決しようとする課題〕
本発明の基礎になっている課題は、最初にあけた種類の
エンジンブレーキを発展させて、弁の開放位置において
絞り弁の弁頭のまわりの′ＩＡで１れを改善することで
ある。[Problem to be Solved by the Invention] The problem on which the invention is based is to develop an engine brake of the initially opened type so that in the opening position of the valve it is possible to The aim is to improve this.
この１１顆を解決するため本発明によれは、凹所がシリ
ンダヘッド底部の燃焼室側表面の方へ向く拡大部を持っ
ている。In order to solve this problem, according to the invention, the recess has an enlarged portion pointing towards the combustion chamber side surface of the bottom of the cylinder head.
凹所の本発明による拡大部によって、弁が開くと、弁頭
の範囲に、この弁頭のまわりの流れに対して輻の広い間
隙が得られ、絞り弁の前において圧縮されるカスのくび
れがこの間隙により少なくなり、弁頭から射れた所でガ
ス流の転向が徐々に始まる。これにより全体として、弁
頭に作用する動的なガス力が大幅に減少して、比較的か
さい側布１ピストンでも、エンジンブレキ運転全体にわ
たって絞り弁の開放位置を確実にａ持することができる
。Due to the inventive enlargement of the recess, when the valve opens, a wide convergence gap is obtained in the area of the valve head for the flow around this valve head, and a constriction of the waste which is compressed in front of the throttle valve is obtained. is reduced by this gap, and the gas flow gradually begins to divert at the point where it exits the valve head. Overall, this significantly reduces the dynamic gas forces acting on the valve head and ensures that the open position of the throttle valve is maintained throughout the entire engine braking operation, even with a relatively bulky side cloth piston. can.
本発明の構成では、請求項２により拡大部が凹所の深さ
の一部のみを占めている。In an embodiment of the invention, the enlarged portion occupies only part of the depth of the recess.
本発明の別の構成では、燃慎室内の絞り弁の位置に関係
して、本発明による利点を得るために、請求項３により
拡大部が凹所の周囲の一部にのみ設けられていれば充分
である。これは、特に絞り弁か燃焼室の周辺に設けられ
ている場合にいえる。このような組込み位置では、拡大
部が燃焼案壁に対向する凹所の周囲範囲に設けられてい
れは充分である。In a further development of the invention, in order to obtain the advantages according to the invention in relation to the position of the throttle valve in the combustion chamber, the enlargement according to claim 3 is provided only partially around the circumference of the recess. It is sufficient. This is especially true if the throttle valve is located around the combustion chamber. In such an installation position, it is sufficient if the widening is provided in the peripheral area of the recess facing the combustion guide wall.
請求項４により凹所が皿穴ドリルによる皿座ぐりにより
拡大されることによって、拡大部の簡単な製造が行なわ
れる。According to another aspect of the present invention, the recess is enlarged by countersinking with a countersink drill, thereby making it possible to manufacture the enlarged part in a simple manner.
図１面により本発明の２つの実施例を以下に説明する。 Two embodiments of the invention will be described below with reference to FIG.
第１図において、ディーゼルｈ関のシリンダヘッドが１
で示されている。普通のカス交換弁のほかに、シリンダ
ヘッド１はきのこ弁として構成された絞り弁２を含んで
いる。この絞り弁２はエンジンブレーキ装置の構成部分
で、シリンダヘッド底部３にある弁開口４を制御する。In Figure 1, the cylinder head of the diesel engine is 1
is shown. In addition to the usual waste exchange valve, the cylinder head 1 includes a throttle valve 2 configured as a mushroom valve. This throttle valve 2 is a component of the engine braking system and controls a valve opening 4 in the bottom 3 of the cylinder head.
シリンダヘッド１の穴６内に案内されて弁棒７に載る制
御ピストン５により、絞り弁２が操作される。エンジン
ブレーキスイッチの操作により制御ピストン５か圧力媒
体例えば圧油又は圧縮空気の作用を受けて、絞り弁を開
放位１トｔへ移動させる。それにより、ピストンにより
シリンダ内に前もって圧縮されていたガスが、弁開口４
を通って絞られて機関の排気通路８へ押出される。シリ
ンダの方へ開く絞り弁の弁頭９がピストンに衝突するの
を回避するため、弁１１１０を持つ弁開口４は、シリン
ダヘッド底８１！ ３の凹所１１内で、シリンダヘッド
底部の燃焼室側表面１２に対してずれて設けられている
。The throttle valve 2 is actuated by a control piston 5 which is guided in a bore 6 in the cylinder head 1 and rests on a valve stem 7 . By actuating the engine brake switch, the control piston 5 is acted upon by a pressure medium, such as pressure oil or compressed air, to move the throttle valve into the open position. Thereby, the gas previously compressed in the cylinder by the piston is transferred to the valve opening 4.
through which it is squeezed and pushed out into the exhaust passage 8 of the engine. In order to avoid the valve head 9 of the throttle valve opening towards the cylinder hitting the piston, the valve opening 4 with the valve 1110 is connected to the cylinder head bottom 81! It is provided within the recess 11 of No. 3 offset from the combustion chamber side surface 12 of the bottom of the cylinder head.
本発明によれば、凹所１１は表面１２の方へ向く拡大部
１３を持っている。この拡大部１３は、凹所１１を区血
１する壁を例えば皿穴ドリルにより面取りすることによ
って生する。According to the invention, the recess 11 has an enlargement 13 pointing towards the surface 12. This enlarged portion 13 is created by chamfering the wall that demarcates the recess 11 using, for example, a countersink drill.
第１図及び第２図によれば、拡大部１３は凹所１１の深
さの一部のみを占めている。皿座ぐり深さは絞り弁の行
程に合わされ、絞り弁の開く際弁頭９が拡大部１３の範
囲にあるような寸法を持っている。According to FIGS. 1 and 2, the enlarged portion 13 occupies only part of the depth of the recess 11. The depth of the countersunk is matched to the stroke of the throttle valve and is dimensioned such that the valve head 9 is in the area of the widening 13 when the throttle valve opens.
第３図に示す実施例と第１図及び第２図に氷表面、 １３．１４ ・・・拡大部。The example shown in Figure 3, the ice surface in Figures 1 and 2, 13.14 ...Enlarged section.
ての実施例において、拡大部１３及び１４によって、絞
り弁２の開く際弁頭９と凹所１１との間の流れｌｌ［ｉ
が少し増大するほかに、シリンダから凹所１１への圧縮
されたカスの流れ案内が改善される。In all embodiments, the enlarged parts 13 and 14 prevent the flow ll[i
In addition to a slight increase in , the flow guidance of the compressed waste from the cylinder into the recess 11 is improved.
第１図は絞り弁を組込まれたシリンダヘッドの断面図、
第２図はシリンダヘッド底部にあって凹所の深さの一部
に限られた拡大部を持つ凹所の断面図、第３図は底まで
達する拡大部を持つ凹所の断面図である。
１・・・シリンダヘッド、２・・・絞り弁、３・・・シ
リンダヘッド底部、４・・・弁開口、８・・・排鈷、通
路、ｌＯ・・・弁斥、１１・・・凹所、１２・・・〈８
ンFigure 1 is a cross-sectional view of the cylinder head with a throttle valve installed.
Fig. 2 is a cross-sectional view of a recess at the bottom of the cylinder head that has an enlarged portion limited to a portion of the depth of the recess, and Fig. 3 is a cross-sectional view of a recess that has an enlarged portion that reaches the bottom. . DESCRIPTION OF SYMBOLS 1... Cylinder head, 2... Throttle valve, 3... Cylinder head bottom, 4... Valve opening, 8... Exhaust port, passage, 1O... Valve hole, 11... Concave Place, 12...〈8
hmm
Claims (1)
ダヘッド底部にある弁座と共にシリンダヘッド底部の燃
焼室側表面に対してずれて凹所の底に設けられているも
のにおいて、凹所（１１）がシリンダヘッド底部（３）
の燃焼室側表面（１２）の方へ向く拡大部（１３、１４
）を持つていることを特徴とする、内燃機関のシリンダ
ヘッドに設けられて弁開口を制御する絞り弁を持つエン
ジンブレーキ。 ２ 拡大部（１３、１４）が凹所（１１）の深さの一部
のみを占めていることを特徴とする、 請求項１に記載のエンジンブレーキ。 ３ 拡大部（１３、１４）が凹所（１１）の周囲の一部
にのみ設けられていることを特徴とする、請求項１又は
２に記載のエンジンブレーキ。 ４ 拡大部（１３、１４）が凹所（１１）の皿座ぐりに
より形成されていることを特徴とする、請求項１ないし
３の１つに記載のエンジンブレーキ。[Scope of Claims] 1. A valve opening connected to an exhaust passage of an internal combustion engine is provided at the bottom of the recess along with a valve seat at the bottom of the cylinder head, offset from the combustion chamber side surface of the bottom of the cylinder head. In this case, the recess (11) is located at the bottom of the cylinder head (3).
Enlarged portions (13, 14) pointing towards the combustion chamber side surface (12) of the
), an engine brake having a throttle valve provided in the cylinder head of an internal combustion engine to control valve opening. 2. Engine brake according to claim 1, characterized in that the widenings (13, 14) occupy only part of the depth of the recess (11). 3. Engine brake according to claim 1 or 2, characterized in that the enlarged portions (13, 14) are provided only partially around the recess (11). 4. Engine brake according to one of claims 1 to 3, characterized in that the widening (13, 14) is formed by a countersink in the recess (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3839450A DE3839450A1 (en) | 1988-11-23 | 1988-11-23 | ENGINE BRAKE WITH A THROTTLE VALVE IN THE CYLINDER HEAD OF THE INTERNAL COMBUSTION ENGINE |
| DE3839450.2 | 1988-11-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02181013A true JPH02181013A (en) | 1990-07-13 |
| JPH0432207B2 JPH0432207B2 (en) | 1992-05-28 |
Family
ID=6367666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1296314A Granted JPH02181013A (en) | 1988-11-23 | 1989-11-16 | Engine brake having throttle valve equipped at cylinder head of internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0370216B1 (en) |
| JP (1) | JPH02181013A (en) |
| DE (2) | DE3839450A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4018485A1 (en) * | 1990-06-09 | 1991-12-12 | Daimler Benz Ag | INTERNAL COMBUSTION ENGINE WITH A THROTTLE VALVE IN A CYLINDER HEAD |
| DE19839420A1 (en) * | 1998-08-29 | 2000-03-02 | Deutz Ag | Engine brake device for an internal combustion engine |
| DE102008012907B4 (en) | 2008-03-06 | 2025-02-13 | Mercedes-Benz Group AG | Method for recovering energy from an exhaust gas stream and motor vehicle |
| AT510529B1 (en) | 2010-09-23 | 2012-10-15 | Avl List Gmbh | FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE |
| AT510527B1 (en) | 2010-09-23 | 2012-09-15 | Avl List Gmbh | FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE |
| AT510528B1 (en) | 2010-09-23 | 2012-09-15 | Avl List Gmbh | FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE |
| AT518933B1 (en) | 2016-07-20 | 2018-07-15 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH A VALVE ACTUATING DEVICE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159635U (en) * | 1985-03-25 | 1986-10-03 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1733696A (en) * | 1927-03-28 | 1929-10-29 | Ricardo Harry Ralph | Valve for internal-combustion engines |
| AT183601B (en) * | 1951-08-31 | 1955-10-25 | Hans Dipl Ing Dr Techn List | Device for braking vehicles with slot-controlled two-stroke internal combustion engines |
| DE1295274B (en) * | 1962-04-05 | 1969-05-14 | Humber Ltd | Gas exchange duct in the cylinder or cylinder head of an internal combustion engine |
| US3520287A (en) * | 1968-08-09 | 1970-07-14 | White Motor Corp | Exhaust valve control for engine braking system |
| KR880701317A (en) * | 1986-05-21 | 1988-07-26 | 원본미기재 | An engine using gaseous fuel |
-
1988
- 1988-11-23 DE DE3839450A patent/DE3839450A1/en active Granted
-
1989
- 1989-10-06 DE DE8989118572T patent/DE58904870D1/en not_active Expired - Fee Related
- 1989-10-06 EP EP89118572A patent/EP0370216B1/en not_active Expired - Lifetime
- 1989-11-16 JP JP1296314A patent/JPH02181013A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159635U (en) * | 1985-03-25 | 1986-10-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0370216A1 (en) | 1990-05-30 |
| DE58904870D1 (en) | 1993-08-12 |
| DE3839450A1 (en) | 1990-05-31 |
| EP0370216B1 (en) | 1993-07-07 |
| DE3839450C2 (en) | 1991-09-19 |
| JPH0432207B2 (en) | 1992-05-28 |
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