JP4473750B2 - 最適な掃気を行うためのピストン溝 - Google Patents
最適な掃気を行うためのピストン溝 Download PDFInfo
- Publication number
- JP4473750B2 JP4473750B2 JP2005060339A JP2005060339A JP4473750B2 JP 4473750 B2 JP4473750 B2 JP 4473750B2 JP 2005060339 A JP2005060339 A JP 2005060339A JP 2005060339 A JP2005060339 A JP 2005060339A JP 4473750 B2 JP4473750 B2 JP 4473750B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- edge wall
- groove
- scavenging
- piston groove
- 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.)
- Active
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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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
- F02B25/22—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 by forming air cushion between charge and combustion residues
-
- 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
- F02F3/00—Pistons
- F02F3/24—Pistons having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke 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
- 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)
- Pistons, Piston Rings, And Cylinders (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Supercharger (AREA)
Description
12 ピストン
14 シリンダブロック
16 ピストン溝
18 縁壁
19 リストピン開口部
20 クランクケース
22 クランクチャンバ
26 シリンダ室(燃焼室)
28 掃気ポート
30 リストピン
32 連接棒
34 クランク軸
36 大端部
38 小端部
40 リストピンボス
41 軸受
44 掃気路
46 空気路
48 頂部
Claims (7)
- シリンダブロック;
該シリンダブロックに内蔵されその内部で垂直に摺動可能なピストン;
該ピストンを貫通して延びるリストピン開口部;及び
該ピストン上に位置するピストン溝;
からなり、該ピストン溝は頂部縁壁を有し、該ピストン溝が最初に開口すると、空気が該頂部縁壁により掃気路の上隅に向けられるように、該頂部縁壁の一部は、該頂部縁壁と該ピストンの外側の側壁との間で形成される交点まで該リストンピン開口部に向かって傾斜していることを特徴とする内燃機関。 - ピストン溝が該ピストンの外周の一部に亘って内側に延び、該ピストン溝の頂部縁壁が半径方向に沿って外側上向きに傾斜するような形状を有する、請求項1に記載の内燃機関。
- 頂縁壁部の傾斜により、該ピストン溝と掃気ポートとの間の開通時間が増加する、請求項1に記載の内燃機関。
- 頂部縁壁が、該掃気路の上隅に向かって傾斜している、請求項1に記載の内燃機関。
- 内燃機関用のピストンであって、
ほぼ円筒形のピストン本体; 及び
ピストン本体の外周の一部に亘って延び、ピストン溝が最初に開口すると、空気が縁壁により掃気路の上隅に向けられるように、該縁壁の一部が、該縁壁と該ピストンの外側の側壁との間で形成される交点まで該ピストン内に位置するピストンピン開口部へ向かって傾斜するような形状を有しているピストン溝;
からなるピストン。 - ピストン溝の縁壁がテーパ形状を有する、請求項5に記載のピストン。
- ピストン溝の該縁壁が、リストピン開口部の中心線に平行な軸線に対して約10度から約60度傾斜している、請求項5に記載のピストン。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/792,995 US7021252B2 (en) | 2004-03-04 | 2004-03-04 | Sas piston channel for optimum air scavenging |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005248961A JP2005248961A (ja) | 2005-09-15 |
JP4473750B2 true JP4473750B2 (ja) | 2010-06-02 |
Family
ID=34750616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005060339A Active JP4473750B2 (ja) | 2004-03-04 | 2005-03-04 | 最適な掃気を行うためのピストン溝 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7021252B2 (ja) |
EP (1) | EP1571307B1 (ja) |
JP (1) | JP4473750B2 (ja) |
CN (1) | CN100455779C (ja) |
AT (1) | ATE488682T1 (ja) |
CA (1) | CA2496129C (ja) |
DE (1) | DE602005024734D1 (ja) |
TW (1) | TWI271471B (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7559299B2 (en) * | 2007-01-19 | 2009-07-14 | Eastway Fair Company Limited | Monolithic cylinder-crankcase |
BR112015014432A2 (pt) | 2012-12-18 | 2017-07-11 | Emerson Climate Technologies | compressor alternativo com sistema de injeção de vapor |
SE543272C2 (en) * | 2019-03-06 | 2020-11-10 | Husqvarna Ab | Engine piston, engine, hand-held tool, and method of manufacturing an engine piston |
CN114508479A (zh) * | 2022-01-12 | 2022-05-17 | 瑞立集团瑞安汽车零部件有限公司 | 两级压缩机和车辆 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US694016A (en) * | 1901-02-02 | 1902-02-25 | Warren Hibbard | Explosive-engine. |
US887237A (en) * | 1907-03-26 | 1908-05-12 | Harris T Dunbar | Gas-engine. |
US1550703A (en) * | 1921-10-03 | 1925-08-25 | Knott Charles | Internal-combustion engine |
US1755260A (en) * | 1927-12-27 | 1930-04-22 | Johnson Brothers Engineering C | Internal-combustion engine |
US1773387A (en) * | 1928-09-12 | 1930-08-19 | Busque Charles Simeon | Gas-engine construction |
FR787289A (fr) * | 1933-12-05 | 1935-09-19 | Bohn Aluminium & Brass Corp | Piston perfectionné |
US3257997A (en) * | 1965-02-04 | 1966-06-28 | Mcculloch Corp | Piston for internal combustion engine |
GB2083550B (en) * | 1980-08-29 | 1984-05-16 | Outboard Marine Corp | Scavening two-stroke internal combustion engines |
US5425346A (en) * | 1993-09-14 | 1995-06-20 | Mavinahally; Nagesh S. | Performance improvement design for two-stroke engines |
DE19900445A1 (de) * | 1999-01-08 | 2000-07-13 | Stihl Maschf Andreas | Zweitaktmotor mit Spülvorlage |
DE60042402D1 (de) * | 1999-04-23 | 2009-07-30 | Husqvarna Zenoah Co Ltd | Zweitaktmotor mit schichtspülung |
US6564760B2 (en) * | 2001-09-20 | 2003-05-20 | Imack Laydera-Collins | Stratified scavenging two-cycle internal combustion engine |
DE10223069A1 (de) * | 2002-05-24 | 2003-12-11 | Stihl Maschf Andreas | Zweitaktmotor |
DE10312092B4 (de) * | 2002-05-24 | 2013-10-10 | Andreas Stihl Ag & Co. Kg | Zweitaktmotor |
DE10229365B4 (de) * | 2002-06-29 | 2013-10-31 | Andreas Stihl Ag & Co. | Zweitaktmotor und Verfahren zu dessen Betrieb |
-
2004
- 2004-03-04 US US10/792,995 patent/US7021252B2/en not_active Expired - Lifetime
-
2005
- 2005-02-01 TW TW094103025A patent/TWI271471B/zh not_active IP Right Cessation
- 2005-02-04 CA CA002496129A patent/CA2496129C/en not_active Expired - Fee Related
- 2005-02-28 AT AT05075479T patent/ATE488682T1/de not_active IP Right Cessation
- 2005-02-28 EP EP05075479A patent/EP1571307B1/en not_active Not-in-force
- 2005-02-28 DE DE602005024734T patent/DE602005024734D1/de active Active
- 2005-03-02 CN CNB2005100511900A patent/CN100455779C/zh active Active
- 2005-03-04 JP JP2005060339A patent/JP4473750B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
US7021252B2 (en) | 2006-04-04 |
US20050193967A1 (en) | 2005-09-08 |
TW200530496A (en) | 2005-09-16 |
CN1664327A (zh) | 2005-09-07 |
CA2496129A1 (en) | 2005-09-04 |
ATE488682T1 (de) | 2010-12-15 |
CA2496129C (en) | 2008-07-29 |
DE602005024734D1 (de) | 2010-12-30 |
CN100455779C (zh) | 2009-01-28 |
TWI271471B (en) | 2007-01-21 |
JP2005248961A (ja) | 2005-09-15 |
EP1571307B1 (en) | 2010-11-17 |
EP1571307A1 (en) | 2005-09-07 |
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