JPH0363711U - - Google Patents
Info
- Publication number
- JPH0363711U JPH0363711U JP12424689U JP12424689U JPH0363711U JP H0363711 U JPH0363711 U JP H0363711U JP 12424689 U JP12424689 U JP 12424689U JP 12424689 U JP12424689 U JP 12424689U JP H0363711 U JPH0363711 U JP H0363711U
- Authority
- JP
- Japan
- Prior art keywords
- fresh air
- air inlet
- volume
- crankcase
- counterweight
- 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 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
第１図はこの考案に係る換気装置の第１実施例
を示す内燃機関要部の断面図、第２図は同じく第
１実施例の前後方向に沿つた断面図、第３図はそ
のシリンダブロツクの底面図、第４図は新気導入
口部分の拡大断面図、第５図は外部配管のレイア
ウトを示す斜視図、第６図は容積変動とし新気導
入口開閉時期との関係を示す特性図、第７図は第
２実施例を示す断面図、第８図は第３実施例を示
す断面図、第９図は第４実施例を示す断面図、第
１０図はそのＸ−Ｘ線に沿つた断面図である。
１……シリンダブロツク、５……クランクケー
ス、６……クランクシヤフト、１３……バルクヘ
ツド、２１……カウンタウエイト、２２……新気
導入口。
Fig. 1 is a cross-sectional view of the main parts of an internal combustion engine showing a first embodiment of the ventilation system according to this invention, Fig. 2 is a cross-sectional view of the first embodiment along the longitudinal direction, and Fig. 3 is a cylinder block thereof. Fig. 4 is an enlarged sectional view of the fresh air inlet portion, Fig. 5 is a perspective view showing the layout of the external piping, and Fig. 6 shows the characteristics of volume variation and its relationship with the opening/closing timing of the fresh air inlet. 7 is a sectional view showing the second embodiment, FIG. 8 is a sectional view showing the third embodiment, FIG. 9 is a sectional view showing the fourth embodiment, and FIG. 10 is a cross-sectional view showing the fourth embodiment. FIG. 1... Cylinder block, 5... Crank case, 6... Crankshaft, 13... Bulkhead, 21... Counterweight, 22... Fresh air introduction port.
Claims (1)
うにバルクヘツドがクランクケース上部に形成さ
れてなる多気筒４サイクル内燃機関において、カ
ウンタウエイトの周面もしくは側面に近接して開
口する新気導入口を設けるとともに、この新気導
入口を含む区画の容積がピストン運動に伴つて最
小となるクランク角では上記カウンタウエイトに
より閉塞され、かつ最大となるクランク角では開
放される位置に、上記新気導入口を配設したこと
を特徴とする内燃機関のクランクケース換気装置
。 In a multi-cylinder four-stroke internal combustion engine in which a bulkhead is formed at the top of the crankcase to partition the inside of the crankcase into a plurality of compartments, a fresh air inlet is provided that opens close to the circumferential surface or side surface of the counterweight. The fresh air inlet is arranged at a position where the volume of the compartment including the fresh air inlet is closed by the counterweight at a crank angle where the volume is at a minimum due to the piston movement, and is opened at a crank angle where the volume is at a maximum. A crankcase ventilation system for an internal combustion engine, which is characterized by:
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12424689U JPH0748967Y2 (en) | 1989-10-24 | 1989-10-24 | Crankcase ventilation system for internal combustion engine |
| US07/599,964 US5069192A (en) | 1989-10-24 | 1990-10-19 | Internal combustion engine with crankcase ventilation system |
| DE4033844A DE4033844A1 (en) | 1989-10-24 | 1990-10-24 | INTERNAL COMBUSTION ENGINE WITH A VENTILATION DEVICE FOR THE CRANKCASE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12424689U JPH0748967Y2 (en) | 1989-10-24 | 1989-10-24 | Crankcase ventilation system for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0363711U true JPH0363711U (en) | 1991-06-21 |
| JPH0748967Y2 JPH0748967Y2 (en) | 1995-11-13 |
Family
ID=31672178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12424689U Expired - Lifetime JPH0748967Y2 (en) | 1989-10-24 | 1989-10-24 | Crankcase ventilation system for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0748967Y2 (en) |
-
1989
- 1989-10-24 JP JP12424689U patent/JPH0748967Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0748967Y2 (en) | 1995-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |