公开(公告)号：US07082910B2

公开(公告)日：2006-08-01

申请号：US09952383

申请日：2001-09-14

申请人： Bo Carlsson ,  Roy Ekdahl ,  Hans Ström

发明人： Bo Carlsson ,  Roy Ekdahl ,  Hans Ström

IPC分类号： F02B25/20

CPC分类号： F02B25/14 ,  F02B25/22 ,  F02B33/04 ,  F02B63/02 ,  F02B2075/025 ,  F02F1/22 ,  F02F3/24

摘要： Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air passage is arranged from an air inlet (2) equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (6, 6′) to at least one connecting port (8, 8′) in the engine's cylinder wall (12). The connecting port (8, 8′) is arranged so that it in connection with piston positions at the top dead center is connected with flow paths (10, 10′) embodied in the piston (13), which extend to the upper part of a number of transfer ducts (3, 3′). Each flow path through the cylinder and piston is to a great extent arranged in the cylinder's lateral direction, on the one hand in that the connecting port (8, 8′) and adjacent scavenging port (31, 31′) of the cylinder are shifted sideways in relation to each other along the periphery of the cylinder wall (12), and on the other hand in that the transfer ducts (3, 3′) of the cylinder are running essentially in the cylinder's lateral direction away from each transfer port (31, 31′) respectively, i.e. tangentially in relation to the circumference of the cylinder wall (12).

摘要翻译： 曲轴箱清扫二冲程内燃机（1），其中活塞端口空气通道布置在空气入口（2）和多个输送管道（3,3'）的上部之间。 空气通道从配备有限制阀（4）的进气口（2）布置，由至少一个发动机参数控制，例如化油器节气门控制。 空气入口经由至少一个连接管道（6,6'）延伸到发动机气缸壁（12）中的至少一个连接端口（8,8'）。 连接端口（8,8'）被布置成使得其与上死点处的活塞位置相连接，该流动路径（10,10'）具体体现在活塞（13）中，该流动路径延伸到 多个输送管道（3,3'）。 一方面，通过气缸和活塞的每个流动路径都大大地设置在气缸的横向上，一方面是气缸的连接口（8,8'）和相邻的清空口（31,31'）移动 沿着气缸壁（12）的周边相对于彼此横向相对，另一方面是气缸的传送管道（3,3'）基本上在气缸的横向方向上远离每个传送端口（ 31，31'），即相对于气缸壁（12）的圆周切向。

公开(公告)号：US06668770B2

公开(公告)日：2003-12-30

申请号：US10064431

申请日：2002-07-12

申请人： Bo Carlsson ,  Hans Ström

发明人： Bo Carlsson ,  Hans Ström

IPC分类号： F02B3304

CPC分类号： F02B25/14 ,  F02B25/22 ,  F02B33/04 ,  F02B33/44 ,  F02B2075/025 ,  F02F1/22

摘要： Crankcase scavenged two-stroke internal combustion engine, in which at least one piston ported air passage, with length Lai, is arranged between an air inlet (2) and each scavenging port (31, 31′) of a number of transfer ducts (3, 3′), with length Ls, from the scavenging port to the crankcase. The air passage is arranged from an air inlet (2) equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (6, 6′) to at least one connecting port (8, 8′) in the engine's cylinder wall (12). The connecting port (8, 8′) is arranged so that it in connection with piston positions at the top dead center is connected with flow paths (10, 10′) embodied in the piston (13), which extend to the upper part of a number of transfer ducts (3, 3′). Each flow path of the piston is arranged so that the air supply is given an essentially equally long period, counted as crank angle or time, as the engine's inlet (22-25), and the length of the inlet into which fuel is added, Li, is greater than 0.6 times the total length of the piston ported air passage Lai and the length of the transfer duct Ls, i.e. 0.6×(Lai+Ls) but smaller than 1.4 times the same length, i.e. 1.4×(Lai+Ls).

摘要翻译： 曲轴箱清扫二冲程内燃机，其中至少一个具有长度Lai的活塞移动空气通道布置在空气入口（2）和多个输送管道（3）的每个扫气口（31,31'）之间 ，3'），长度为Ls，从扫气口到曲轴箱。 空气通道从配备有限制阀（4）的进气口（2）布置，由至少一个发动机参数控制，例如化油器节气门控制。 空气入口经由至少一个连接管道（6,6'）延伸到发动机气缸壁（12）中的至少一个连接端口（8,8'）。 连接端口（8,8'）被布置成使得其与上死点处的活塞位置相连接，该流动路径（10,10'）具体体现在活塞（13）中，该流动路径延伸到 多个输送管道（3,3'）。 活塞的每个流动路径被布置成使得空气供给基本上等长的时间段被计算为曲柄角或时间，作为发动机的入口（22-25），以及添加燃料的入口的长度， Li大于活塞端口空气通道Lai的总长度的0.6倍和传送管道Ls的长度，即0.6x（Lai + Ls）但小于同一长度的1.4倍，即1.4x（Lai + Ls ）。

公开(公告)号：US06557504B2

公开(公告)日：2003-05-06

申请号：US10194697

申请日：2002-07-12

申请人： Hans Ström ,  Bo Carlsson

发明人： Hans Ström ,  Bo Carlsson

IPC分类号： F02B3304

CPC分类号： F02D41/06 ,  F02B2075/025 ,  F02D2400/04 ,  F02M1/16

摘要： A two-stroke internal combustion engine comprising a cylinder (10; 50) with a movable piston (11; 52) in it, which cylinder at its one end has a combustion chamber (16; 51) and at its other end is connected to a crankcase (15; 53). The crankcase and the combustion chamber are mutually connected via a scavenging duct (17; 56), whose opening and closing is controlled by the movement of the piston, and a carburetor (20; 55) is via an inlet port (21) connected to the crankcase. In order to simplify starting the engine it is provided with a device (23-6; 61-65; 70-72) for supply of fuel to the scavenging duct (17; 56) adjacent the combustion chamber.

摘要翻译： 一种二冲程内燃机，其包括在其中具有可移动活塞（11; 52）的气缸（10; 50），所述气缸在其一端具有燃烧室（16; 51），并且在其另一端连接 曲轴箱（15; 53）。 曲轴箱和燃烧室经由清扫管道（17; 56）相互连接，扫气管道（17; 56）通过活塞的运动控制其开闭，化油器（20; 55）经由入口（21）连接到 曲轴箱。 为了简化起动发动机，它设置有用于向邻近燃烧室的扫气管道（17; 56）供应燃料的装置（23-6; 61-65; 70-72）。

公开(公告)号：US07574984B2

公开(公告)日：2009-08-18

申请号：US10908698

申请日：2005-05-23

申请人： Lars Andersson ,  Göran Dahlberg ,  Bo Jonsson ,  Hans Ström

发明人： Lars Andersson ,  Göran Dahlberg ,  Bo Jonsson ,  Hans Ström

IPC分类号： F02B33/00

CPC分类号： F02F1/22 ,  F02B25/14 ,  F02B25/22 ,  F02B33/04 ,  F02B63/02 ,  F02B2075/025 ,  F02F3/24

摘要： A crankcase scavenged two-stroke internal combustion engine (1) in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air inlet is equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (6, 6′) to at least one connecting port (7, 7′) in the engine's cylinder wall (12). The connecting port (7, 7′) is arranged so that when the piston is in a top dead center configuration, it is connected with flow paths (9, 9′) embodied in the piston (13). The flow paths (9, 9′) extend to the upper part of a number of transfer ducts (3, 3′), and the flow paths in the piston are arranged so that the recess (10, 10′; 11, 11′) in the piston that meets the respective transfer duct's port (31, 31′) in a manner that the air supply is given an essentially equally long period, counted as crank angle or time, in relation to the fuel and air mixture inlet period.

摘要翻译： 一种曲轴箱清扫的二冲程内燃机（1），其中在空气入口（2）和多个输送管道（3,3'）的上部之间布置有活塞端口空气通道。 空气入口配有限制阀（4），由至少一个发动机参数控制，例如化油器节气门控制。 空气入口经由至少一个连接管道（6,6'）延伸到发动机气缸壁（12）中的至少一个连接端口（7,7'）。 连接端口（7,7'）被布置成使得当活塞处于上止点构型时，其连接有实施在活塞（13）中的流动路径（9,9'）。 流动路径（9,9'）延伸到多个传送管道（3,3'）的上部，并且活塞中的流动路径被布置成使得凹部（10,10'; 11,11' ）在空气供应相对于燃料和空气混合物入口周期计算为曲柄角或时间的方式基本相当长的时间段内与活塞相接触的活塞中。

公开(公告)号：US07025021B1

公开(公告)日：2006-04-11

申请号：US09483478

申请日：2000-05-30

申请人： Lars Andersson ,  Göran Dahlberg ,  Bo Jonsson ,  Hans Ström

发明人： Lars Andersson ,  Göran Dahlberg ,  Bo Jonsson ,  Hans Ström

IPC分类号： F02B33/00

CPC分类号： F02F1/22 ,  F02B25/14 ,  F02B25/22 ,  F02B33/04 ,  F02B63/02 ,  F02B2075/025 ,  F02F3/24

摘要： Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air inlet is equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburettor throttle control. The air inlet extends via at least one connecting duct (6, 6′) to at least one connecting port (7, 7′) in the engine's cylinder wall (12). The connecting port (7, 7′) is arranged so that it in connection with piston positions at the top dead center is connected with flow paths (9, 9′) embodied in the piston (13), which extend to the upper part of a number of transfer ducts (3, 3′), and the flow paths in the piston are so arranged that the recess (10, 10′; 11, 11′) in the piston that meets the respective transfer duct's port (31, 31′) is so arranged that the air supply is given an essentially equally long or longer period, counted as crank angle or time, in relation to the fuel and air mixture inlet period.

摘要翻译： 曲轴箱清扫二冲程内燃机（1），其中活塞端口空气通道布置在空气入口（2）和多个输送管道（3,3'）的上部之间。 空气入口配备有由至少一个发动机参数控制的限制阀（4），例如化油器节气门控制。 空气入口经由至少一个连接管道（6,6'）延伸到发动机气缸壁（12）中的至少一个连接端口（7,7'）。 连接端口（7,7'）被布置成使得其与上止点处的活塞位置相连接，该流动通道（9,9'）具有在活塞（13）中的流动路径（9,9'），其延伸到 多个输送管道（3,3'）和活塞中的流动路径被布置成使得活塞中的凹部（10,10'; 11,11'）与相应的传送管道的端口（31,31 '）被布置成使得空气供应相对于燃料和空气混合物入口周期被给予基本上等长或更长的时间段（以曲柄角或时间计）。