JP3773507B2 - 2サイクル内燃エンジン - Google Patents
2サイクル内燃エンジン Download PDFInfo
- Publication number
- JP3773507B2 JP3773507B2 JP2003285302A JP2003285302A JP3773507B2 JP 3773507 B2 JP3773507 B2 JP 3773507B2 JP 2003285302 A JP2003285302 A JP 2003285302A JP 2003285302 A JP2003285302 A JP 2003285302A JP 3773507 B2 JP3773507 B2 JP 3773507B2
- Authority
- JP
- Japan
- Prior art keywords
- scavenging
- piston
- internal combustion
- combustion engine
- cycle internal
- 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 - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
図1は、本発明に係る2サイクル内燃エンジンの一実施形態を示す縦断面図、図2は図1のII−II矢視断面図、図3は図2のIII−III矢視断面図である。
10a シリンダボア
11s 縦溝
18 クランク室
20 ピストン
22A 上部外周
22B 下部外周
22s 切欠部
31 第一掃気通路
32 第二掃気通路
31a 掃気入口
31b 掃気出口
32b 掃気出口
34 排気口
40 掃気導入通路部
40’ 掃気導入通路部
K 混合気
Claims (4)
- 掃気入口(31a、31a)及び掃気出口(31b、31b、32b、32b)が共にシリンダボア(10a)に開口する、反転掃気式をとる一対又は複数対のC型掃気通路(31、31、32、32)が設けられている2サイクル内燃エンジン(1)であって、
前記シリンダボア(10a)と該シリンダボア(10a)内で上下方向に往復動するピストン(20)との間に、クランク室(18)から混合気(K)を前記掃気入口(31a、31a)に導くための掃気導入通路部(40、40)が形成されるとともに、前記ピストン(20)の下降行程において、該ピストン(20)により前記掃気入口(31a、31a)の実効開口面積が漸減せしめられるようにされていることを特徴とする2サイクル内燃エンジン。 - 前記ピストン(20)の下部外周(22B)に、前記掃気導入通路部(40、40)となる切欠部(22s、22s)が形成され、前記ピストン(20)の下降行程において、前記切欠部(22s、22s)を画成する前記ピストン(20)の上部外周(22A)により、前記掃気入口(31a、31a)の実効開口面積が漸減せしめられるようにされていることを特徴とする請求項1に記載の2サイクル内燃エンジン。
- 前記シリンダボア(10a)に、前記掃気導入通路部(40、40)の一部となる縦溝(11s、11s)が形成されていることを特徴とする請求項1又は2に記載の2サイクル内燃エンジン。
- 前記掃気導入通路部(40)の総通路断面積は、前記掃気通路(31、31、32、32)の総通路断面積の40%以下とされていることを特徴とする請求項1から3のいずれか一項に記載の2サイクル内燃エンジン。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003285302A JP3773507B2 (ja) | 2003-08-01 | 2003-08-01 | 2サイクル内燃エンジン |
DE102004037494A DE102004037494A1 (de) | 2003-08-01 | 2004-07-27 | Zweitakt-Verbrennungsmotor |
US10/899,770 US7011078B2 (en) | 2003-08-01 | 2004-07-27 | Two-stroke internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003285302A JP3773507B2 (ja) | 2003-08-01 | 2003-08-01 | 2サイクル内燃エンジン |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005054644A JP2005054644A (ja) | 2005-03-03 |
JP3773507B2 true JP3773507B2 (ja) | 2006-05-10 |
Family
ID=34101120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003285302A Expired - Fee Related JP3773507B2 (ja) | 2003-08-01 | 2003-08-01 | 2サイクル内燃エンジン |
Country Status (3)
Country | Link |
---|---|
US (1) | US7011078B2 (ja) |
JP (1) | JP3773507B2 (ja) |
DE (1) | DE102004037494A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840019B1 (fr) * | 2002-05-24 | 2005-08-19 | Stihl Ag & Co Kg Andreas | Moteur a deux temps, avec piston mobile, a balayage ameliore |
US7331315B2 (en) | 2005-02-23 | 2008-02-19 | Eastway Fair Company Limited | Two-stroke engine with fuel injection |
US20060243230A1 (en) * | 2005-03-23 | 2006-11-02 | Mavinahally Nagesh S | Two-stroke engine |
US7258087B1 (en) * | 2006-03-03 | 2007-08-21 | Cameron International Corporation | Air intake porting for a two stroke engine |
JP5793017B2 (ja) | 2011-08-10 | 2015-10-14 | 株式会社やまびこ | 2サイクル内燃エンジン |
JP6276724B2 (ja) * | 2015-03-02 | 2018-02-07 | 株式会社丸山製作所 | 2サイクルエンジン |
US10526997B2 (en) * | 2018-01-17 | 2020-01-07 | Chun-Li Chen | Cylinder structure of internal combustion engine |
CN111810313A (zh) * | 2020-06-02 | 2020-10-23 | 浙江派尼尔科技股份有限公司 | 一种分层扫气活塞 |
EP4271923A1 (en) * | 2021-01-02 | 2023-11-08 | Dayco IP Holdings, LLC | Magnetically latching valve for fuel vapor management systems and systems incorporating same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3583632B2 (ja) * | 1998-12-15 | 2004-11-04 | タナカ工業株式会社 | 2サイクルエンジン |
-
2003
- 2003-08-01 JP JP2003285302A patent/JP3773507B2/ja not_active Expired - Fee Related
-
2004
- 2004-07-27 US US10/899,770 patent/US7011078B2/en not_active Expired - Fee Related
- 2004-07-27 DE DE102004037494A patent/DE102004037494A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US20050022757A1 (en) | 2005-02-03 |
JP2005054644A (ja) | 2005-03-03 |
US7011078B2 (en) | 2006-03-14 |
DE102004037494A1 (de) | 2005-03-03 |
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