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1. 发明授权

US10487721B2 Two-stroke internal combustion engine 有权
公开(公告)号：US10487721B2
公开(公告)日：2019-11-26
申请号：US15562130
申请日：2015-03-31
申请人： HUSQVARNA AB
发明人： Alexander Lundgren , Joel Berneklev , Tommy Shoug
IPC分类号： F02B25/06 , F02M35/10 , F02M35/108 , F02B25/22 , F02B75/02 , F02D9/02
CPC分类号： F02B25/06 , F02B25/22 , F02B75/02 , F02D9/02 , F02M35/108 , F02M35/10196 , F02B2075/025 , F02D2009/0252 , F02M35/1017
摘要： An internal combustion engine (10), including a cylinder (15) with a cylinder wall (12) defining a combustion chamber (32), a piston (13) reciprocally disposed within the combustion chamber (32) a crankcase (16) including a crankshaft (11) rotatably disposed therein, the piston (13) being connected to the crankshaft (11) by a connecting rod (17), a first scavenger duct (3) extending between the combustion chamber (32) and the crankcase (16), the first scavenger duct (3) including a top port (31a) and a bottom port (31b), a fuel and air inlet channel (22) in fluid communication with the crankcase (16) by way of a piston ported fuel and air inlet port (23) so that the fuel and air inlet channel (22) delivers a fuel and air mixture to the crankcase (16), and an airhead channel (6) in fluid communication with the first scavenger duct (3) by way of a first piston ported air inlet port (7), characterized in that the fuel and air inlet channel (22) is in fluid communication with the airhead channel (6) so that the fuel and air mixture is combinable with the air flow from the airhead channel (6).

2. 发明授权

US10060392B2 Stratified scavenging two-stroke internal combustion engine and carburetor thereof 有权
公开(公告)号：US10060392B2
公开(公告)日：2018-08-28
申请号：US14715625
申请日：2015-05-19
申请人： Yamabiko Corporation
发明人： Takahiro Yamazaki , Shirou Yamaguchi , Takamasa Otsuji
IPC分类号： F02B25/00 , F02M17/12 , F02M17/34 , F02M35/10 , F02M35/108 , F02B25/22 , F02B33/04 , F02B63/02 , F02M9/08 , F02M19/08 , F02B75/02
CPC分类号： F02M17/12 , F02B25/22 , F02B33/04 , F02B63/02 , F02B2075/025 , F02M9/08 , F02M17/34 , F02M19/08 , F02M35/1017 , F02M35/1019 , F02M35/10196 , F02M35/10255 , F02M35/10262 , F02M35/108 , Y02T10/14 , Y02T10/146
摘要： A carburetor achieves better emission characteristics while improving a combustion state by increasing a delivery ratio of a stratified scavenging engine and reducing intake resistance. No dividing wall is provided between a throttle valve 204 and a choke valve 242, and a gap 244 between the valves 204 and 242 is opened. Intake air in both of an upper region and a lower region of the choke valve 242 flows into an air-fuel mixture passage 246 in a lower region of the fully-open throttle valve 204. A main nozzle 202 is arranged so as to be inclined toward the throttle valve 204.

3. 发明授权

US09816431B2 Stratified scavenging two-cycle engine 有权
公开(公告)号：US09816431B2
公开(公告)日：2017-11-14
申请号：US13453470
申请日：2012-04-23
申请人： Shigetoshi Ishida
发明人： Shigetoshi Ishida
IPC分类号： F02B25/00 , F02B25/16 , F02B25/22 , F02F1/22 , F02F3/24 , F02B75/02
CPC分类号： F02B25/16 , F02B25/22 , F02B2075/025 , F02F1/22 , F02F3/24
摘要： A laminar-scavenging two-cycle engine which has a high laminar-scavenging effect, includes a scavenging passage having a crankcase side portion extending along a crankcase, and a cylinder side portion extending along a cylinder and having a length larger than the sum of the diameter and stroke of the cylinder. An ambient air introducing passage for introducing leading air into the scavenging passage is connected to an intermediate portion of the scavenging passage. A notch for opening a scavenging port to the side of the crankcase when a piston is near the top dead center is formed in the piston.

4. 发明申请

US20170130642A1 Rotary Carburetor For Two-Stroke Internal Combustion Engine 有权
公开(公告)号：US20170130642A1
公开(公告)日：2017-05-11
申请号：US15346745
申请日：2016-11-09
申请人： YAMABIKO CORPORATION
发明人： Takahiro Yamazaki , Shirou Yamaguchi , Takamasa Otsuji , Hidekazu Tsunoda
IPC分类号： F02B25/22 , F02B75/02 , F02M9/08 , F02M35/10 , F02M35/108
CPC分类号： F02B25/22 , F02B25/14 , F02B33/04 , F02B75/02 , F02B2075/025 , F02M9/08 , F02M35/1019 , F02M35/10196 , F02M35/108
摘要： To allow an intake negative pressure to directly act on a fuel outlet formed on a nozzle tube, and to guide a fuel discharged from the fuel outlet in the nozzle tube to the fuel-air mixture passage. A rotary carburetor (200) has a guide plate member (42) downstream of a fuel outlet (30) located in a through-hole (14). The guide plate member (42) has both side edges (42b) away from an inner wall surface (14a) of the through-hole (14). The through-hole (14) is divided by the guide plate member (42) into a first passage portion (44) and a second passage portion (46). The first passage portion (44) communicates through a piston groove with a scavenging passage of a cylinder. The fuel discharged from the fuel outlet (30) is guided by the guide plate member (42) to the second passage portion (46) and is supplied through the second passage portion (46) to a fuel-air mixture passage (24) of an engine intake system.

5. 发明申请

US20160177877A1 A CARBURETOR ASSEMBLY 有权
标题翻译： CARBURETOR大会
公开(公告)号：US20160177877A1
公开(公告)日：2016-06-23
申请号：US14902610
申请日：2013-07-04
申请人： HUSQVARNA AB
发明人： Magnus Ottosson
IPC分类号： F02M23/03 , F02B75/02
CPC分类号： F02M23/03 , F02B23/10 , F02B25/22 , F02B75/02 , F02B2075/025 , F02D11/04 , F02M1/02 , F02M17/38 , Y02T10/125 , Y02T10/146
摘要： The invention relates to a carburetor assembly (10) for a two-stroke internal combustion engine, the assembly comprising a main intake passage (12) accommodating a throttle valve (30), an additional air passage (14) accommodating an additional air valve (50), a pivotable air valve lever (55) turning together with the air valve (50), and an interlock lever (35) turning together with the throttle valve (30). The interlock lever (35) is configured to be settable in an interlocked pivotal position, in which the throttle valve (30) is open to a certain degree in order to provide a start gas position of the throttle valve (30), wherein the interlock is arranged to be released if the interlock lever (35) is pivoted further in the opening direction of the throttle valve (30). The assembly further comprising a pivotable trigger lever (45) responsive to e.g. pulling of a throttle trigger and being operatively connected to the air valve lever (55). The pivotable trigger lever (45) is operatively connectable to the interlock lever (35) or a member that moves with the interlock lever (35) via an abutting engagement at predetermined relative positions of the trigger lever (45) and the interlock lever (35). Further, the trigger lever (45) is arranged to permit the interlock lever (35) to pivot away from the abutting engagement in the opening direction of the throttle valve (30) at least to an offset angle ( ) relative to the trigger lever (45), such that the interlocked lever (35) can be set in the interlocked position without affecting the pivotal position of the trigger lever (45).
摘要翻译：本发明涉及一种用于二冲程内燃机的化油器组件（10），该组件包括容纳节流阀（30）的主进气通道（12），容纳额外空气阀的附加空气通道（14）与空气阀（50）一起转动的可枢转的空气阀杆（55）和与节流阀（30）一起转动的互锁杆（35）。联锁杆35被构造成能够在一定的枢转位置中被设定，其中节气门30打开一定程度以便提供节流阀30的起始气体位置，其中联锁如果联动杆35沿节气门30的打开方向进一步枢转，则被布置成释放。该组件还包括一个可枢转的触发杆（45）拉动节流触发器并且可操作地连接到空气阀杆（55）。可转动触发杆（45）可操作地连接到联锁杆（35）或与触发杆（45）和互锁杆（35）的预定相对位置处的邻接接合件通过联锁杆（35）移动的构件）。此外，触发杆（45）被布置成允许联锁杆（35）在节气门（30）的打开方向上远离邻接接合枢转至少相对于触发杆的偏移角（）使得可以将联动杆35设定在联锁位置而不影响触发杆45的枢转位置。

6. 发明申请

US20150377117A1 STRATIFIED SCAVENGING TWO-STROKE ENGINE 有权
标题翻译：分体式起动两冲程发动机
公开(公告)号：US20150377117A1
公开(公告)日：2015-12-31
申请号：US14850452
申请日：2015-09-10
申请人： MAKITA CORPORATION
发明人： Yoshiaki TAKAYANAGI
IPC分类号： F02B25/20 , F02B33/30 , F02B33/04 , F02B25/14 , F02B75/02
CPC分类号： F02B25/20 , F02B25/14 , F02B25/22 , F02B33/04 , F02B33/30 , F02B43/02 , F02B75/02 , F02B2075/025 , F02B2700/037 , F02F3/24 , F02F7/0036 , F02M35/1017 , F02M35/10275
摘要： A stratified scavenging two-stroke engine includes a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a scavenging port that opens to the inside of a cylinder, and a second scavenging passage that branches from the first scavenging passage and extends to a second scavenging intake that opens to the inside of the crankcase. An air passage is provided to supply air for pre-scavenging into the first scavenging passage at a position closer to the first scavenging intake than a position at which the second scavenging passage branches from the first scavenging passage. A first check valve inhibits a flow of air from the first scavenging passage during an upward stroke of the piston, and a second check valve inhibits a flow of air and a gaseous mixture from the first scavenging passage during a downward stroke of the piston.
摘要翻译：分层扫气二冲程发动机包括：第一扫气通道，其从开口到曲轴箱内部的第一扫气入口延伸到通向气缸内部的扫气口;以及第二扫气通道，其从第一扫气通道扫气通道并延伸到通向曲轴箱内部的第二个扫气入口。在第二扫气通道从第一扫气通道分支的位置处，提供一空气通道，用于将预净化的空气排放到靠近第一清扫进气口的第一扫气通道中。第一止回阀在活塞的向上行程期间阻止来自第一扫气通道的空气流动，并且第二止回阀在活塞的向下冲程期间阻止来自第一扫气通道的空气和气体混合物的流动。

7. 发明申请

US20150337765A1 Stratified Scavenging Two-Stroke Internal Combustion Engine And Carburetor Thereof 审中-公开
标题翻译：分层清扫二冲程内燃机和化油器
公开(公告)号：US20150337765A1
公开(公告)日：2015-11-26
申请号：US14715625
申请日：2015-05-19
申请人： Yamabiko Corporation
发明人： Takahiro Yamazaki , Shirou Yamaguchi , Takamasa Otsuji
IPC分类号： F02M17/12 , F02M35/10 , F02M17/34 , F02M19/08 , F02B33/04 , F02B25/22
CPC分类号： F02M17/12 , F02B25/22 , F02B33/04 , F02B63/02 , F02B2075/025 , F02M9/08 , F02M17/34 , F02M19/08 , F02M35/1017 , F02M35/1019 , F02M35/10196 , F02M35/10255 , F02M35/10262 , F02M35/108 , Y02T10/14 , Y02T10/146
摘要： A carburetor achieves better emission characteristics while improving a combustion state by increasing a delivery ratio of a stratified scavenging engine and reducing intake resistance. No dividing wall is provided between a throttle valve 204 and a choke valve 242, and a gap 244 between the valves 204 and 242 is opened. Intake air in both of an upper region and a lower region of the choke valve 242 flows into an air-fuel mixture passage 246 in a lower region of the fully-open throttle valve 204. A main nozzle 202 is arranged so as to be inclined toward the throttle valve 204.
摘要翻译：化油器通过提高分层清扫发动机的输送比并降低进气阻力来实现更好的排放特性，同时改善燃烧状态。在节流阀204和阻流阀242之间没有设置分隔壁，并且打开阀204和242之间的间隙244。扼流阀242的上部区域和下部区域中的进气流入到完全打开的节流阀204的下部区域中的空气 - 燃料混合通道246中。主喷嘴202布置成倾斜朝向节流阀204。

8. 发明申请

US20140318515A1 STRATIFIED SCAVENGING TWO-STROKE ENGINE 有权
标题翻译：分体式起动两冲程发动机
公开(公告)号：US20140318515A1
公开(公告)日：2014-10-30
申请号：US14261945
申请日：2014-04-25
申请人： MAKITA CORPORATION
发明人： Kenji IMAFUKU , Yoshifumi WATANABE , Hideaki HIRANO , Junichi MASUDA
IPC分类号： F02B29/00 , F02B63/02
CPC分类号： F02B29/00 , F02B25/14 , F02B25/22 , F02B63/02 , F02B2075/025 , F02F7/0036 , F02M35/1019
摘要： An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion.
摘要翻译：空气领先型，分层扫气二冲程发动机。包括与其连接的气缸构件和曲轴箱的发动机具有进气通道，排气通道，第一和第二扫气通道，连通部分和空气通道。进气通道，排气通道和空气通道形成在气缸构件中。第一和第二扫气通路各具有圆筒部件侧通路和曲轴箱侧通路。第一和第二扫气通道的气缸构件侧通道经由连通部分相互连通。空气通道连接到第一扫气通道的气缸构件侧通道。在发动机中，用于预清扫的空气从空气通道通过止回阀引入第一扫气通道的气缸构件侧通道中，并且一部分引入的空气通过连通部分流入第二扫气通道。

9. 发明授权

US08863705B2 Hand-held power tool 有权
标题翻译：手持电动工具
公开(公告)号：US08863705B2
公开(公告)日：2014-10-21
申请号：US13225789
申请日：2011-09-06
申请人： Niels Kunert , Michael Grether
发明人： Niels Kunert , Michael Grether
IPC分类号： F02B25/00 , F02B33/04 , F02B25/14 , F02B25/22 , F02B75/02 , F02B63/02
CPC分类号： F02B25/14 , F02B25/22 , F02B33/04 , F02B63/02 , F02B2075/025
摘要： A hand-held power tool has a two-stroke engine with a cylinder with combustion chamber and a piston disposed therein that drives a crankshaft supported in a crankcase. In at least one piston position, crankcase and combustion chamber are connected by a transfer passage. An air passage supplies in at least one piston position combustion air to the transfer passage. A mixture passage for fuel/air mixture is provided. Air and mixture passages in operation are at least partially connected to each other. Part of the mixture passage is formed in a carburetor where a fuel port opens into the mixture passage. The mixture passage opens into the crankcase with a piston-controlled mixture inlet having a width in circumferential direction of the cylinder. Upon upward piston stroke the mixture inlet is connected to the crankcase with a portion of the width before a connection of air passage and transfer passage is established.
摘要翻译：手持式电动工具具有二冲程发动机，其具有带有燃烧室的气缸和设置在其中的活塞，其驱动支撑在曲轴箱中的曲轴。在至少一个活塞位置，曲轴箱和燃烧室通过传送通道连接。空气通道在至少一个活塞位置供应燃烧空气到输送通道。提供了用于燃料/空气混合物的混合通道。运行中的空气和混合物通道至少部分地彼此连接。混合物通道的一部分形成在燃料口通向混合通道的化油器中。混合物通道通过活塞控制的混合物入口打开到曲轴箱中，该入口具有圆柱体的圆周方向的宽度。在向上活塞冲程时，混合物入口在空气通道和输送通道的连接建立之前与宽度的一部分连接。

10. 发明授权

US08833316B2 Stratified scavenging two-stroke engine 有权
标题翻译：分层扫气二冲程发动机
公开(公告)号：US08833316B2
公开(公告)日：2014-09-16
申请号：US13980428
申请日：2011-02-03
申请人： Ryou Ono , Mikihiro Asahina
发明人： Ryou Ono , Mikihiro Asahina
IPC分类号： F02B25/00 , F02B33/04 , F02B25/22 , F02B25/20 , F02B25/14 , F02B33/00
CPC分类号： F02B33/00 , F02B25/14 , F02B25/20 , F02B25/22 , F02B33/04
摘要： A stratified scavenging two-stroke engine includes: a crankcase (2); a cylinder (3) being provided with a cylinder bore (31); an intake passage (4) supplying air-fuel mixture into the crankcase (2) via an intake port (4A); a scavenging passage (5) supplying the air-fuel mixture from the crankcase (2) into the cylinder bore (31) via a scavenging port (5A); a leading-air passage (6) supplying leading air into the scavenging passage (5); and an exhaust passage (7) being disposed on an opposite side of the intake passage (4) with the cylinder bore (31) interposed therebetween, the exhaust passage (7) discharging exhaust gas via an exhaust port, in which the scavenging passage (5) includes a main passage (51) provided near the exhaust port and a sub passage (52) provided near the intake port (4A), the main passage (51) and the sub passage (52) are isolated from each other by a partition (25, 34) that extends over substantially an entire length of the main passage (51) and the sub passage (52), the sub passage (52) includes an air-fuel mixture inlet (55) provided at a position corresponding to an opening end (35) of the cylinder bore (31) that faces the crankcase (2), and the inlet (55) functions as a flow rate adjuster having a throttle effect.
摘要翻译：分层扫气二冲程发动机包括：曲轴箱（2）; 气缸（3）设置有气缸孔（31）; 进气通道（4），经由进气口（4A）将空气 - 燃料混合物供应到所述曲轴箱（2）中; 清空通道（5），其经由清扫口（5A）将空气 - 燃料混合物从曲轴箱（2）供应到气缸孔（31）中; 将引导空气供给到扫气通道（5）中的引导空气通道（6）; 和排气通路（7），其设置在所述进气通路（4）的与所述气缸孔（31）相对的相反侧，所述排气通道（7）经由排气口排出废气，所述排气通道 5）包括设置在排气口附近的主通道（51）和设置在进气口（4A）附近的副通道（52），主通道（51）和副通道（52）通过一个分隔壁（25,34），其在主通道（51）和副通道（52）的基本上整个长度上延伸，副通道（52）包括空气 - 燃料混合物入口（55），设置在对应于所述气缸孔（31）的面向曲轴箱（2）的开口端（35），并且所述入口（55）用作具有节流效应的流量调节器。

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