JPH0296404U - - Google Patents
Info
- Publication number
- JPH0296404U JPH0296404U JP442789U JP442789U JPH0296404U JP H0296404 U JPH0296404 U JP H0296404U JP 442789 U JP442789 U JP 442789U JP 442789 U JP442789 U JP 442789U JP H0296404 U JPH0296404 U JP H0296404U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- valve
- view
- cylinder
- bypass port
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Characterised By The Charging Evacuation (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Jet Pumps And Other Pumps (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
第１図は本考案の一実施例に係る内燃機関の排
気装置の縦断面図、第２図イは第１図の装置の開
閉弁部の拡大部分断面図、ロは開閉弁部の他の構
造例を示す断面図、ハは開閉弁部のさらに他の構
造例を示す断面図、第３図イは第１図の装置の開
閉弁の駆動機構の一例を示す部分平面図、ロは他
の例を示す部分平面図、第４図イは第１図の―
線に沿う部分断面図、ロは他の構造例を示す部
分断面図、第５図は本考案の一実施例に係る内燃
機関の排気装置を適用したエンジンの全体概略縦
断面図、第６図は第１図の装置のクランク角とバ
ルブタイミングおよび排気弁直後圧力との関係図
、第７図は第１図の装置の排気弁開弁直前の状態
を示す部分断面図、第８図イ，ロは開閉弁制御マ
ツプの例を示すエンジン回転速度と排気開始圧と
の関係図、第９図イは排気バイパスポートのシリ
ンダ内への開口部の別の例を示す正面図、第９図
ロは第９図イのＸ―Ｘ線に沿う拡大部分断面図、
である。
１……シリンダブロツク、２……シリンダ、３
……ピストン、３ａ……ピストン頂面、４……シ
リンダヘツド、９……排気ポート、１１……排気
弁、１２……カム、１３……排気バイパスポート
、１４，３１……シリンダ内への開口、１５，１
６，１７……開閉弁、２１……ステツプモータ、
２２……ＥＣＵ、２５……ダイヤフラム弁、２６
，２９……排気ポート内への開口、３０……ピス
トンスカート部。
Fig. 1 is a longitudinal sectional view of an exhaust system for an internal combustion engine according to an embodiment of the present invention, Fig. 2 A is an enlarged partial sectional view of the on-off valve section of the device in Fig. 1, and B is an enlarged partial sectional view of the on-off valve section of the device shown in Fig. FIG. 3A is a partial plan view showing an example of the drive mechanism of the on-off valve of the device shown in FIG. A partial plan view showing an example of Fig. 4A is a partial plan view showing an example of -
6 is a partial cross-sectional view taken along the line, B is a partial cross-sectional view showing another structural example, FIG. is a diagram showing the relationship between the crank angle, valve timing, and pressure immediately after the exhaust valve of the device shown in FIG. 1, FIG. 7 is a partial cross-sectional view showing the state of the device shown in FIG. Figure 9B is a diagram showing the relationship between engine speed and exhaust start pressure, showing an example of an on-off valve control map; Figure 9B is a front view showing another example of the opening of the exhaust bypass port into the cylinder; is an enlarged partial cross-sectional view taken along line X-X in Figure 9A,
It is. 1...Cylinder block, 2...Cylinder, 3
... Piston, 3a ... Piston top surface, 4 ... Cylinder head, 9 ... Exhaust port, 11 ... Exhaust valve, 12 ... Cam, 13 ... Exhaust bypass port, 14, 31 ... Into cylinder opening, 15,1
6, 17...Opening/closing valve, 21...Step motor,
22...ECU, 25...Diaphragm valve, 26
, 29...Opening into the exhaust port, 30...Piston skirt portion.
Claims (1)
、一端が下死点に達したピストンの頂面の僅か上
方のシリンダ内に開口し他端が排気弁により開閉
される排気ポート内に開口する排気バイパスポー
トを設け、該排気バイパスポート内に、該排気バ
イパスポートを開閉する開閉弁を設けたことを特
徴とする内燃機関の排気装置。 An exhaust bypass port is provided from the cylinder block to the cylinder head, with one end opening into the cylinder slightly above the top surface of the piston that has reached bottom dead center, and the other end opening into an exhaust port opened and closed by an exhaust valve. An exhaust system for an internal combustion engine, characterized in that an on-off valve for opening and closing the exhaust bypass port is provided in the exhaust bypass port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP442789U JPH0296404U (en) | 1989-01-20 | 1989-01-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP442789U JPH0296404U (en) | 1989-01-20 | 1989-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0296404U true JPH0296404U (en) | 1990-08-01 |
Family
ID=31206934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP442789U Pending JPH0296404U (en) | 1989-01-20 | 1989-01-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0296404U (en) |
-
1989
- 1989-01-20 JP JP442789U patent/JPH0296404U/ja active Pending