公开(公告)号：US07415949B2

公开(公告)日：2008-08-26

申请号：US10581878

申请日：2003-12-19

申请人： Bo Carlsson ,  Pär Martinsson ,  Mikael Holmdahl ,  Ulf Olander

发明人： Bo Carlsson ,  Pär Martinsson ,  Mikael Holmdahl ,  Ulf Olander

IPC分类号： F02B25/00

CPC分类号： F02B25/22 ,  F02B33/02 ,  F02B33/04 ,  F02B33/44 ,  F02F1/04 ,  F02F1/22

摘要： A cylinder (1) for a crankcase scavenged two-stroke engine, comprising a cylinder bore (2) with centre line (12) and on opposite sides of the cylinder located closed transfer ducts (3, 3′), which cylinder (1) has an underside (4) essentially perpendicular towards the cylinder bore (2), intended to be connected to a crankcase (5) in a parting plane (A), and besides an inlet (8) for air/fuel mixture, the cylinder is provided with at least one inlet (9, 9′) for additional air to the combustion chamber, which inlet for additional air runs through a cylinder wall (11) and via a recess in the piston and a transfer port (6, 6′) leads down into the transfer ducts (3, 3′). Especially the transfer ducts (3,3′) each have an upper section (3a, 3a′) leading from the transfer port (6, 6′) and in a tangential direction in relation to the cylinder bore (2) and is followed by an essentially right angled bend (3b, 3b′) leading into a lower section (3c, 3c′) leading into the parting plane (A), and at least the right-angled bend of each transfer duct is located on opposite sides of an exhaust duct (7) and during at least a part of the right-angled bend (3b, 3b′) the transfer ducts approach each other.

摘要翻译： 一种用于曲轴箱清扫二冲程发动机的气缸（1），包括具有中心线（12）的气缸孔（2）和位于闭合传送管道（3,3'）的气缸的相对侧上，该气缸（1） 具有基本上垂直于气缸孔（2）的下侧（4），用于在分型平面（A）中连接到曲轴箱（5），并且除了用于空气/燃料混合物的入口（8）之外，气缸是 设置有至少一个入口（9,9'），用于向燃烧室提供额外的空气，该入口用于附加空气穿过气缸壁（11）并经由活塞中的凹部和传送口（6,6'） 引导到传送管道（3,3'）。 特别地，传送管道（3,3'）各自具有从传送端口（6,6'）引出并相对于气缸孔（2）沿切线方向的上部（3a，3a'），并且是 之后是通向通向分型平面（A）的下部分（3c，3c'）的基本上直角的弯曲部（3b，3b'），并且至少每个传送管道的直角弯曲部分位于 在排气管道（7）的相对侧上，并且在直角弯曲部（3b，3b'）的至少一部分期间，传送管道彼此接近。

公开(公告)号：US20080035096A1

公开(公告)日：2008-02-14

申请号：US10581878

申请日：2003-12-19

申请人： Bo Carlsson ,  Par Martinsson ,  Mikael Holmdahl ,  Ulf Olander

发明人： Bo Carlsson ,  Par Martinsson ,  Mikael Holmdahl ,  Ulf Olander

IPC分类号： F02F1/00

CPC分类号： F02B25/22 ,  F02B33/02 ,  F02B33/04 ,  F02B33/44 ,  F02F1/04 ,  F02F1/22

摘要： A cylinder (1) for a crankcase scavenged two-stroke engine, comprising a cylinder bore (2) with centre line (12) and on opposite sides of the cylinder located closed transfer ducts (3, 3′), which cylinder (1) has an underside (4) essentially perpendicular towards the cylinder bore (2), intended to be connected to a crankcase (5) in a parting plane (A), and besides an inlet (8) for air/fuel mixture, the cylinder is provided with at least one inlet (9, 9′) for additional air to the combustion chamber, which inlet for additional air runs through a cylinder wall (11) and via a recess in the piston and a transfer port (6, 6′) leads down into the transfer ducts (3, 3′). Especially the transfer ducts (3,3′) each have an upper section (3a, 3a′) leading from the transfer port (6, 6′) and in a tangential direction in relation to the cylinder bore (2) and is followed by an essentially right angled bend (3b, 3b′) leading into a lower section (3c, 3c′) leading into the parting plane (A), and at least the right-angled bend of each transfer duct is located on opposite sides of an exhaust duct (7) and during at least a part of the right-angled bend (3b, 3b′) the transfer ducts approach each other.

摘要翻译： 一种用于曲轴箱清扫二冲程发动机的气缸（1），包括具有中心线（12）的气缸孔（2）和位于闭合传送管道（3,3'）的气缸的相对侧上，该气缸（1） 具有基本上垂直于气缸孔（2）的下侧（4），用于在分型平面（A）中连接到曲轴箱（5），并且除了用于空气/燃料混合物的入口（8）之外，气缸是 设置有至少一个入口（9,9'），用于向燃烧室提供额外的空气，该入口用于附加空气穿过气缸壁（11）并经由活塞中的凹部和传送口（6,6'） 引导到传送管道（3,3'）。 特别地，传送管道（3,3'）各自具有从传送端口（6,6'）引出并相对于气缸孔（2）沿切线方向的上部（3a，3a'），并且是 之后是通向通向分型平面（A）的下部分（3c，3c'）的基本上直角的弯曲部（3b，3b'），并且至少每个传送管道的直角弯曲部分位于 在排气管道（7）的相对侧上，并且在直角弯曲部（3b，3b'）的至少一部分期间，传送管道彼此接近。

公开(公告)号：US06854430B2

公开(公告)日：2005-02-15

申请号：US10258092

申请日：2001-04-18

申请人： Ulf Olander

发明人： Ulf Olander

IPC分类号： F02B33/04 ,  F02B33/44 ,  F02B75/02 ,  F02F1/22 ,  F02B17/00

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

摘要： The subject invention refers to an engine body for a crankcase scavenged two-stroke engine, comprising a cylinder (1) with a cylinder bore (2), and on opposite sides of the cylinder located, closed scavenging ducts (12a, 12b), as well as crankcase (10) with at least two crankcase parts, whereby the cylinder (1) and the crankcase (10) are connected to each other in a mutual parting plane (A) essentially perpendicular towards the longitudinal axis (B) of the cylinder bore (2). The engine body is characterized in that said scavenging ducts (12a, 12b) are having an essentially right-angled bend for, in said parting plane (A), running in a mutual direction around the periphery of the cylinder bore (2), whereby the scavenging ducts (12a, 12b), in level with the parting plane (A), comprise depressions (21a, 21b) in at least one of the either the cylinder (1) or the crankcase (10), as well as one connecting duct (14a, 14b) each, that connect each depression (21a, 21b) with the inner space of the crankcase (10). Owing to that the scavenging ducts are running in a mutual direction around the periphery of the cylinder bore and are having one connecting duct each to the crankcase, scavenging ducts of such a length are created so that a homogenous air/fuel mixture can be achieved in the scavenging ducts without the crankcase taking too bulky proportions. The length of the scavenging ducts will also allow a satisfactory stratification of the scavenging gases for a two-stroke engine provided with additional air.

摘要翻译： 本发明涉及一种用于曲轴箱扫气二冲程发动机的发动机主体，其包括具有气缸孔（2）的气缸（1），并且在位于气缸的相对侧上的闭合扫气管（12a，12b） 以及具有至少两个曲轴箱部分的曲轴箱（10），由此缸体（1）和曲轴箱（10）在基本垂直于缸体的纵向轴线（B）的相互分离平面（A）中彼此连接 孔（2）。 发动机主体的特征在于，所述扫气管（12a，12b）在所述分型平面（A）中具有基本上直角的弯曲部，围绕气缸孔（2）的周边在相互的方向上延伸，由此 与分型平面（A）平齐的扫气管（12a，12b）在气缸（1）或曲轴箱（10）中的至少一个中包括凹陷（21a，21b），以及一个连接 每个凹槽（21a，21b）与曲轴箱（10）的内部空间连接的导管（14a，14b）。 由于清扫导管围绕气缸孔的周边沿相互方向运行，并且每个具有一个连接管道到每个曲轴箱，产生这样长度的扫气管，使得可以实现均匀的空气/燃料混合物 没有曲轴箱的扫气管占据太大的比例。 清扫管道的长度还将允许具有附加空气的二冲程发动机的清扫气体的令人满意的分层。