JPH02124224U - - Google Patents
Info
- Publication number
- JPH02124224U JPH02124224U JP3414189U JP3414189U JPH02124224U JP H02124224 U JPH02124224 U JP H02124224U JP 3414189 U JP3414189 U JP 3414189U JP 3414189 U JP3414189 U JP 3414189U JP H02124224 U JPH02124224 U JP H02124224U
- Authority
- JP
- Japan
- Prior art keywords
- blow
- combustion chamber
- intake
- valve
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
第１〜５図はこの考案の一実施例を示し第１図
は吹き抜け防止機構を設けたエンジンの断面図、
第２図はバルブオーバラツプ時期のエンジンの要
部拡大断面図、第３図は吸気弁が開いているとき
のエンジンの要部拡大断面図、第４図はシリンダ
ヘツドの底面部、第５図は吸気弁及び排気弁のリ
フト量とクランク角との関係を示す図である。第
６図は、この考案の他の実施例を示すシリンダヘ
ツドの底面図である。第７図は、従来例を示すバ
ルブオーバラツプ時期のエンジンの要部拡大断面
図である。
図において、２……エンジン、４……シリンダ
ヘツド、６……シリンダブロツク、８……ピスト
ン、１０……燃焼室、１２……吸気ポート、１４
……排気ポート、１６……吸気弁、１８……排気
弁、２０……吸気弁ステム、２２……排気弁ステ
ム、２８……吸気弁カム、３０……排気弁カム、
４０……吹き抜け防止部材、４２……出没孔、４
４……駆動ステム、４６……駆動ステム孔、４８
……駆動カム、５０……没入ばねである。
Figures 1 to 5 show an embodiment of this invention, and Figure 1 is a sectional view of an engine equipped with a blow-through prevention mechanism;
Figure 2 is an enlarged sectional view of the main parts of the engine at the valve overlap period, Figure 3 is an enlarged sectional view of the main parts of the engine when the intake valve is open, Figure 4 is the bottom of the cylinder head, The figure is a diagram showing the relationship between the lift amount of the intake valve and the exhaust valve and the crank angle. FIG. 6 is a bottom view of a cylinder head showing another embodiment of this invention. FIG. 7 is an enlarged sectional view of a main part of an engine at the valve overlap period showing a conventional example. In the figure, 2...Engine, 4...Cylinder head, 6...Cylinder block, 8...Piston, 10...Combustion chamber, 12...Intake port, 14
...Exhaust port, 16...Intake valve, 18...Exhaust valve, 20...Intake valve stem, 22...Exhaust valve stem, 28...Intake valve cam, 30...Exhaust valve cam,
40...Blow-through prevention member, 42...Sink hole, 4
4... Drive stem, 46... Drive stem hole, 48
. . . Drive cam, 50 . . . Recessed spring.
Claims (1)
気ポートを開閉する吸気弁及び排気弁のバルブオ
ーバラツプ時期に前記吸気ポート及び排気ポート
間の燃焼室内に突出され吸気の吹き抜けを防止す
る吹き抜け防止部材を設けたことを特徴とするエ
ンジン燃焼室の吹き抜け防止機構。 A blow-through prevention member is provided that protrudes into the combustion chamber between the intake port and exhaust port to prevent intake air from blow-through during valve overlap timing of the intake valve and exhaust valve that open and close the intake port and exhaust port communicating with the combustion chamber of the engine. A blow-through prevention mechanism for the engine combustion chamber is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3414189U JPH02124224U (en) | 1989-03-24 | 1989-03-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3414189U JPH02124224U (en) | 1989-03-24 | 1989-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02124224U true JPH02124224U (en) | 1990-10-12 |
Family
ID=31538357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3414189U Pending JPH02124224U (en) | 1989-03-24 | 1989-03-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02124224U (en) |
-
1989
- 1989-03-24 JP JP3414189U patent/JPH02124224U/ja active Pending