JPH056005B2 - - Google Patents
Info
- Publication number
- JPH056005B2 JPH056005B2 JP59213267A JP21326784A JPH056005B2 JP H056005 B2 JPH056005 B2 JP H056005B2 JP 59213267 A JP59213267 A JP 59213267A JP 21326784 A JP21326784 A JP 21326784A JP H056005 B2 JPH056005 B2 JP H056005B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- air intake
- air supply
- intake valve
- valve seat
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 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
- F01L3/06—Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
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給気弁座に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an intake valve seat for an internal combustion engine.
従来の内燃機関の給気系を第５図に示す。第６
図は第５図の−矢視図である。第５図におい
て、０１は給気弁、０２は給気弁座インサート、
０３は給気ポート、０４はシリンダである。
FIG. 5 shows an air supply system of a conventional internal combustion engine. 6th
The figure is a view taken along the - arrow in FIG. In Fig. 5, 01 is the air supply valve, 02 is the air supply valve seat insert,
03 is an air supply port, and 04 is a cylinder.
第６図において、０５は排気弁、０７は燃料弁
（デイーゼルの場合）あるいは点火栓（ガソリン
の場合）、０６は給気弁のまわりからの給気の流
速分布を示す。 In FIG. 6, 05 shows the exhaust valve, 07 shows the fuel valve (in the case of diesel) or the ignition plug (in the case of gasoline), and 06 shows the flow velocity distribution of the air supply from around the intake valve.
上記構成において、給気ポート０３からシリン
ダ０４内へ空気または混合気が入る場合、第７図
に示すように、ポート内壁面の形状に沿つて給気
弁に到達するまでの間に、壁面によりガイドされ
給気弁０１の中心まわりの旋回成分を持ちなが
ら、給気弁座インサート０２の上部内面に沿つて
給気弁０１上から流れ込む。給気弁まわりからの
給気の流れは給気弁と弁座インサートとで形成す
る円環状の通路から流れる。その通路はいわばノ
ズルとも言うべきもので、この部分の形状は給気
弁からの給気の流れに大きな影響を与える。シリ
ンダ内に流れ込んだ給気はシリンダ軸心まわりに
旋回流を形成し、シリンダ内での混合気形成を助
け、燃焼効率向上に効果をあげている。 In the above configuration, when air or air-fuel mixture enters the cylinder 04 from the air supply port 03, as shown in FIG. The air flows from above the air intake valve 01 along the upper inner surface of the air intake valve seat insert 02 while being guided and having a swirling component around the center of the air intake valve 01. The air supply from around the air supply valve flows through an annular passage formed by the air supply valve and the valve seat insert. This passage can be called a nozzle, and the shape of this part has a great effect on the flow of air from the air supply valve. The air supplied into the cylinder forms a swirling flow around the cylinder axis, helping to form a mixture within the cylinder and improving combustion efficiency.
しかし上記のものには次の欠点がある。 However, the above method has the following drawbacks.
従来の給気弁座インサート０２の形状は全周同
一形状であり、給気弁と弁座インサートで形成す
る円環状の通路の各断面は全円周上で同一とな
る。従つて、流れに対する抵抗は各断面一様とな
つている。しかし、シリンダ内で給気スワールを
形成する場合には、給気ポート入口と反対方向へ
多くの給気量を流す方が効率が良いが、先に述べ
たように通路形状が一定であるため給気ポート入
口と同一方向にも給気が流出するため、シリンダ
内でのスワール形成に対して不都合である。 The conventional air supply valve seat insert 02 has the same shape all around the circumference, and each cross section of the annular passage formed by the air supply valve and the valve seat insert is the same on the entire circumference. Therefore, the resistance to flow is uniform in each cross section. However, when forming a supply air swirl inside the cylinder, it is more efficient to flow a large amount of supply air in the direction opposite to the intake port entrance, but as mentioned earlier, the shape of the passage is constant. Since the supply air also flows out in the same direction as the entrance of the supply air port, it is inconvenient for swirl formation within the cylinder.
本発明の目的は上記の点に着目し、給気ポー
ト、給気弁、給気弁座を有する４サイクル内燃機
関の空気スワール形成を向上させる装置を提供す
ることであり、その特徴とするところは、給気弁
座インサート内周面の給気弁中心とシリンダ中心
とを結ぶ線の給気入口に対して反対側の全周の1/
２乃至1/3の部分をシート部の上部のエツジを無く
して丸味を持たせたことである。
An object of the present invention is to focus on the above points and provide a device for improving air swirl formation in a four-stroke internal combustion engine having an air intake port, an air intake valve, and an air intake valve seat. is 1/1/2 of the entire circumference on the opposite side to the air intake inlet of the line connecting the air intake valve center and the cylinder center on the inner peripheral surface of the air intake valve seat insert.
The upper edge of the seat part is removed from 2 to 1/3 to give it a rounded appearance.
この場合は、シリンダ内でスワール形成に有利
な方向の流れに対する通路形状を抵抗の少ないも
のとして給気ポート入口から反対方向の給気弁ま
わりから流れ出る給気量を多くし、効率良く空気
スワールを形成する。
In this case, the shape of the passage in the cylinder in the direction favorable to swirl formation is designed to have less resistance, and the amount of air flowing out from the air intake port inlet and around the air intake valve in the opposite direction is increased to efficiently create air swirl. Form.
以下図面を参照して本発明による実施例につき
説明する。
Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明による１実施例の構造を示す説
明図、第２図は第１図の−矢視図、第３図ａ
は本発明による弁座インサートを示す平面図、第
３図ｂは第３図ａのａ−ａ矢視断面図である。 FIG. 1 is an explanatory diagram showing the structure of one embodiment of the present invention, FIG. 2 is a view taken along the - arrow in FIG. 1, and FIG. 3 a
3 is a plan view showing a valve seat insert according to the present invention, and FIG. 3b is a sectional view taken along the line a-a in FIG. 3a.
第１図において、０１は給気弁、０３は給気ポ
ート、０４はシリンダで、０２１は本発明による
給気弁座インサートである。 In FIG. 1, 01 is an air intake valve, 03 is an air intake port, 04 is a cylinder, and 021 is an air intake valve seat insert according to the present invention.
第２図において、０５は排気弁、０７は燃料弁
（デイーゼルの場合）あるいは点火栓（ガソリン
の場合）、０６１は本発明の場合の給気弁まわり
からの給気の流速分布を示す。本発明による給気
弁座インサートの断面は給気ポート入口からスワ
ール形成方向に弁座の全円周の1/2〜1/3の部分だ
け（一点鎖線で示される範囲Ａ）をシート部の上
部のエツジを無くして丸味Ｒを持たせている。な
お、O1はシリンダ中心、O2は給気弁中心を示す。 In FIG. 2, 05 shows the exhaust valve, 07 shows the fuel valve (in the case of diesel) or the spark plug (in the case of gasoline), and 061 shows the flow velocity distribution of the air supply from around the air intake valve in the case of the present invention. The cross section of the air supply valve seat insert according to the present invention is such that only 1/2 to 1/3 of the total circumference of the valve seat (range A indicated by the dashed line) from the air supply port entrance in the direction of swirl formation is located in the seat portion. The upper edge is removed to give it a rounded radius. Note that O 1 indicates the center of the cylinder, and O 2 indicates the center of the intake valve.
上記構成の場合の作用について述べる。 The operation in the case of the above configuration will be described.
給気ポート０３からシリンダ０４内へ空気また
は混合気が入る場合、第４図に示すように、ポー
ト内壁面の形状に沿つて給気弁に到達するまでの
間に、ポート内壁面によりガイドされ、給気弁０
１の中心まわりの旋回成分を持ちながら給気弁座
インサート０２１の上部内面に沿つて給気弁０１
の上からシリンダ内に流れ込む。 When air or air-fuel mixture enters the cylinder 04 from the air supply port 03, it is guided by the port's inner wall along the shape of the port's inner wall until it reaches the air supply valve, as shown in Figure 4. , air supply valve 0
The air supply valve 01 along the upper inner surface of the air supply valve seat insert 021 while having a swirling component around the center of the air supply valve 01
Flows into the cylinder from above.
給気弁まわりからの給気の流れは、給気弁と弁
座インサートとで形成する円環状の通路から流れ
出る。その通路はいわばノズルとも言うべきもの
である。本発明による給気弁座インサート０２１
は、給気ポート入口とは反対方向のスワール形成
方向の全周の1/2〜1/3の部分の断面は、シート部
上部のエツジが無く丸味をおびているため、給気
ポートからシリンダ内への流れの抵抗が少なくな
り流量が多くなる。 The flow of air from around the air supply valve flows out from an annular passage formed by the air supply valve and the valve seat insert. The passage can be called a nozzle. Air supply valve seat insert 021 according to the invention
The cross section of 1/2 to 1/3 of the entire circumference in the swirl forming direction opposite to the air supply port entrance has no edge at the top of the seat and is rounded. The flow resistance is reduced and the flow rate increases.
従つて、シリンダ内でスワール形成に有利な方
向に給気弁まわりから流れ出る給気量が多くなる
ため、効率良く空気スワールを形成できる。
Therefore, the amount of air flowing out from around the air intake valve in the cylinder in a direction advantageous for swirl formation increases, so that air swirl can be formed efficiently.
第１図は本発明による１実施例の装置を示す説
明図、第２図は第１図の−矢視図、第３図ａ
は本発明による１実施例の給気弁座インサートを
示す平面図、第３図ｂは第３図ａのａ−ａ矢視断
面図、第４図は給気ポートからの給気の流出状態
を示す図、第５図は従来の内燃機関の給気系を示
す説明図、第６図は第５図の−矢視図、第７
図は給気ポートからの給気の流出状態を示す説明
図である。
０１……給気弁、０３……給気ポート、０４…
…シリンダ、０７……燃料弁または点火栓、０２
１……給気弁座インサート、０６１……給気の流
速分布。
FIG. 1 is an explanatory diagram showing a device according to an embodiment of the present invention, FIG. 2 is a view taken along the - arrow in FIG. 1, and FIG. 3 is a
3 is a plan view showing an air supply valve seat insert according to one embodiment of the present invention, FIG. 3b is a sectional view taken along the line a-a in FIG. 3a, and FIG. FIG. 5 is an explanatory diagram showing the air supply system of a conventional internal combustion engine. FIG.
The figure is an explanatory diagram showing the state of outflow of air supply from the air supply port. 01...Air supply valve, 03...Air supply port, 04...
...Cylinder, 07...Fuel valve or spark plug, 02
1... Air supply valve seat insert, 061... Supply air flow velocity distribution.
Claims (1)
られた給気ポート、給気弁及び給気弁座からなる
給気系において、給気弁座インサート内周面の給
気弁中心とシリンダ中心とを結ぶ線の給気入口に
対して反対側の全周の1/2乃至1/3の部分をシート
部の上部のエツジを無くして丸味を持たせたこと
を特徴とする内燃機関の給気弁座。1 In an air supply system consisting of an air intake port, an air intake valve, and an air intake valve seat provided in the cylinder head of a 4-cycle internal combustion engine, connect the center of the air intake valve on the inner peripheral surface of the air intake valve seat insert to the center of the cylinder. An air intake valve seat for an internal combustion engine, characterized in that 1/2 to 1/3 of the entire circumference on the opposite side to the line air intake inlet is rounded by eliminating the upper edge of the seat part. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59213267A JPS6193213A (en) | 1984-10-13 | 1984-10-13 | Air supply valve seat of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59213267A JPS6193213A (en) | 1984-10-13 | 1984-10-13 | Air supply valve seat of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6193213A JPS6193213A (en) | 1986-05-12 |
| JPH056005B2 true JPH056005B2 (en) | 1993-01-25 |
Family
ID=16636267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59213267A Granted JPS6193213A (en) | 1984-10-13 | 1984-10-13 | Air supply valve seat of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6193213A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239353A1 (en) * | 1982-10-23 | 1984-04-26 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | Valve seat ring for an intake port of valve-controlled internal combustion engines |
-
1984
- 1984-10-13 JP JP59213267A patent/JPS6193213A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6193213A (en) | 1986-05-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |