JPH0395027U - - Google Patents
Info
- Publication number
- JPH0395027U JPH0395027U JP319090U JP319090U JPH0395027U JP H0395027 U JPH0395027 U JP H0395027U JP 319090 U JP319090 U JP 319090U JP 319090 U JP319090 U JP 319090U JP H0395027 U JPH0395027 U JP H0395027U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- passage
- scavenging
- intake
- opened
- 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
- 230000002000 scavenging effect Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Valve Device For Special Equipments (AREA)
Description
第１図は本考案による実施例が適用された４サ
イクル・エンジンの１例を示す構成図、第２図は
吸気通路内におけるクランク角と吸気通路内圧力
との関係を説明する説明図、第３図は吸、排気バ
レブおよび掃気バルブにおけるクランク角とバル
ブリフト量との関係を説明する説明図である。
１…エンジン燃焼室、２…吸気バルブ、３…吸
気通路、４…排気バルブ、５…排気通路、６…掃
気バルブ、６ａ…バルブステム、７…掃気通路、
８…油圧アクチユエータ、８ａ…スプリングシー
ト、８ｂ…スプリング、９…油路、１０…制御装
置、１１…切換弁、１２…分岐通路、１４…圧力
チヤンバー、１５…通路、１６…ワンウエイバル
ブ、１７…ピストン。
FIG. 1 is a configuration diagram showing an example of a four-cycle engine to which an embodiment of the present invention is applied; FIG. 2 is an explanatory diagram illustrating the relationship between the crank angle and the pressure in the intake passage; FIG. 3 is an explanatory diagram illustrating the relationship between the crank angle and the valve lift amount in the intake and exhaust valves and the scavenging valve. DESCRIPTION OF SYMBOLS 1...Engine combustion chamber, 2...Intake valve, 3...Intake passage, 4...Exhaust valve, 5...Exhaust passage, 6...Scavenging valve, 6a...Valve stem, 7...Scavenging passage,
8... Hydraulic actuator, 8a... Spring seat, 8b... Spring, 9... Oil path, 10... Control device, 11... Switching valve, 12... Branch passage, 14... Pressure chamber, 15... Passage, 16... One-way valve, 17... piston.
Claims (1)
油圧アクチユエータで開閉リフト動作される掃気
バルブを設け、 上記油圧アクチユエータを油圧源に連通する油
路に、制御装置からの出力信号により排気行程の
終り近くの所要時間その油路を開くように動作す
る切換弁を設けると共に、 前記掃気バルブにより開閉される掃気通路を圧
力チヤンバーに連通させ、該圧力チヤンバーと吸
気バルブにより開閉される吸気通路とを連通する
通路に、吸気通路内の正圧をチヤンバー側に導く
方向に開くワンウエイバルブを設けてなる４サイ
クル・エンジンの残留ガス掃気装置。[Scope of Claim for Utility Model Registration] A scavenging valve is provided in the engine combustion chamber and is opened and closed by a hydraulic actuator separate from the intake and exhaust valves, and a control device is connected to the oil passage that connects the hydraulic actuator to a hydraulic source. A switching valve is provided which operates to open the oil passage for a required period of time near the end of the exhaust stroke in response to an output signal from the scavenging valve, and the scavenging passage opened and closed by the scavenging valve is communicated with the pressure chamber, and the pressure chamber and the intake valve communicate with each other. A residual gas scavenging device for a four-cycle engine, which is provided with a one-way valve that opens in a direction to guide positive pressure in the intake passage to the chamber side, in a passage that communicates with the intake passage that is opened and closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP319090U JPH0395027U (en) | 1990-01-18 | 1990-01-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP319090U JPH0395027U (en) | 1990-01-18 | 1990-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0395027U true JPH0395027U (en) | 1991-09-27 |
Family
ID=33446506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP319090U Pending JPH0395027U (en) | 1990-01-18 | 1990-01-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0395027U (en) |
-
1990
- 1990-01-18 JP JP319090U patent/JPH0395027U/ja active Pending
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