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    • 2. 发明授权
    • Two-stroke engine
    • 二冲程发动机
    • US06932032B2
    • 2005-08-23
    • US10986115
    • 2004-11-12
    • Andreas LingenMatthias HehnkeJoachim BaumhauerAndreas BähnerMichael JoosAxel KlimmekHans Holderle
    • Andreas LingenMatthias HehnkeJoachim BaumhauerAndreas BähnerMichael JoosAxel KlimmekHans Holderle
    • F02B25/20F02B33/04F02B63/02F02B75/02F02D9/02F02M35/108
    • F02D9/109F02B25/20F02B33/04F02B63/02F02B2075/025F02D2009/0279F02M35/1019F02M35/108
    • A two-stroke engine (1) has a combustion chamber (3) disposed in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5). The piston (5) drives a crankshaft (7) via a connecting rod (6) and the crankshaft (7) is rotatably journalled in a crankcase (4). The two-stroke engine (1) has an intake channel (8) for the supply of fuel into the crankcase (4), an outlet (13) for exhaust gases from the combustion chamber (3) and an air channel (10) for the supply of substantially fuel-free air. A throttle element (18) is mounted in the air channel (10). At pregiven positions of the piston (5), the crankcase (4) is connected via at least one transfer channel (14) to the combustion chamber (3). In order to prevent air from being drawn by suction into the air channel because of leakages during idle or at low rpm, a fluid connection is provided between the air channel (10) downstream of the throttle element (18) and the crankcase (4) for underpressure compensation which connection is present at least partially for a position of the piston from 90° ahead of bottom dead center to 90° after bottom dead center. A connection between the crankcase (4) and the intake channel (8) can be provided in lieu of, or in addition to, the connection to the air channel (10).
    • 二冲程发动机(1)具有设置在气缸(2)中的燃烧室(3)。 燃烧室(3)由往复活塞(5)限定。 活塞(5)通过连杆(6)驱动曲轴(7),曲轴(7)可旋转地支承在曲轴箱(4)中。 二冲程发动机(1)具有用于向曲轴箱(4)供应燃料的进气通道(8),用于来自燃烧室(3)的废气的出口(13)和用于 供应基本上无燃料的空气。 节流元件(18)安装在空气通道(10)中。 在活塞(5)的预制位置,曲轴箱(4)经由至少一个输送通道(14)连接到燃烧室(3)。 为了防止由于怠速或低转速下的泄漏而吸入空气而吸入空气,在节气门元件(18)下游的空气通道(10)和曲轴箱(4)之间设有流体连接, 对于负压补偿,至少部分地将活塞的位置从下死点之前90°至下死点之后的90°存在。 可以提供曲轴箱(4)和进气通道(8)之间的连接来代替或除了与空气通道(10)的连接。
    • 6. 发明授权
    • Two-stroke engine
    • 二冲程发动机
    • US07331314B2
    • 2008-02-19
    • US11302766
    • 2005-12-14
    • Gerhard OsburgWolfgang LuithardtPeter SchmidtTommy RoitschMichael Joos
    • Gerhard OsburgWolfgang LuithardtPeter SchmidtTommy RoitschMichael Joos
    • F02B33/04
    • F02D9/02F02B25/14F02B25/22F02B2075/025F02D2009/0208F02D2009/0272
    • A two-stroke engine has a cylinder with a combustion chamber that is delimited by a reciprocating piston that drives with a connecting rod a crankshaft rotatably supported in a crankcase. In predetermined positions of the piston, the crankcase is connected by at least one transfer channel to the combustion chamber. The two-stroke engine has a mixture channel for supplying a fuel/air mixture and an air channel that supplies substantially fuel-free air to the transfer channel. In order to provide a simple adjustment of the air channel to different two-stroke engines of a model range, a component in which the air channel is formed has a throttle member that is arranged at an end face of the component. The throttle member throttles the air flow through the air channel in at least one operating state of the two-stroke engine.
    • 二冲程发动机具有一个具有燃烧室的气缸,该气缸由一个往复运动的活塞限定,往复活塞用连杆驱动,曲轴可旋转地支撑在曲轴箱中。 在活塞的预定位置,曲轴箱通过至少一个传送通道连接到燃烧室。 二冲程发动机具有用于供应燃料/空气混合物的混合通道和向输送通道提供基本上无燃料的空气的空气通道。 为了将空气通道简单地调整到模型范围的不同的二冲程发动机,其中形成空气通道的部件具有布置在部件的端面处的节流部件。 节气门构件在二冲程发动机的至少一个操作状态下节流通过空气通道的空气流。
    • 7. 发明授权
    • Connecting piece
    • 连接件
    • US06959701B2
    • 2005-11-01
    • US10396813
    • 2003-03-26
    • Helmut ZimmermannMichael JoosAndreas RadtkeStefan Leuze
    • Helmut ZimmermannMichael JoosAndreas RadtkeStefan Leuze
    • F02B63/02F02B75/02F02M35/10F02M29/00
    • F02M35/10078F02B63/02F02B2075/025F02M35/10118F02M35/10137F02M35/1017F02M35/1019F02M35/10196F02M35/10301F02M35/10321F05C2225/08
    • A connecting piece (1) between a carburetor (4) and an inlet channel (3) is disposed in an internal combustion engine (2) of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine, et cetera. The connecting piece (1) serves to compensate for relative position changes between the engine (2) and the carburetor (4). The connecting piece (1) is made of elastic material and has an expansion fold (5) which functions to compensate for length changes. The length of the connecting piece can be changed from a pressed length (a) to an expanded length (b). The expansion fold (5) partitions the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7). The carburetor-end section (6) includes a circularly-shaped flow cross section and the engine-end section (7) includes a circularly-shaped flow cross section at the side facing toward the expansion fold (5) and has a flow cross section which departs from the circular shape at the end facing toward the engine. The connecting piece (1) includes on the inner side grooves (24) which run in the longitudinal direction.
    • 在化油器(4)和入口通道(3)之间的连接件(1)设置在诸如电动链锯,切断机器的便携式手持式电动工作装置的内燃机(2)中, 等等。 连接件(1)用于补偿发动机(2)和化油器(4)之间的相对位置变化。 连接件(1)由弹性材料制成并且具有用于补偿长度变化的膨胀折叠(5)。 连接件的长度可以从按压长度(a)变为扩展长度(b)。 膨胀折叠部(5)将连接件(1)分隔成化油器端部(6)并进入发动机端部(7)。 化油器端部(6)包括圆形流动横截面,发动机端部(7)在朝向膨胀折叠(5)的一侧包括圆形流动横截面,并且具有流动横截面 它在面向发动机的端部处脱离圆形。 连接件(1)包括在纵向方向上延伸的内侧槽(24)。
    • 8. 发明授权
    • Connecting piece
    • 连接件
    • US06868813B2
    • 2005-03-22
    • US10396421
    • 2003-03-26
    • Helmut ZimmermannMichael JoosAndreas RadtkeStefan Leuze
    • Helmut ZimmermannMichael JoosAndreas RadtkeStefan Leuze
    • F02B63/02F02B75/02F02M29/14F02M35/10
    • F02M35/10078F02B63/02F02B2075/025F02M29/14F02M35/10118F02M35/10137F02M35/1017F02M35/1019F02M35/10196F02M35/10281F02M35/10301F02M35/10321F05C2225/08
    • An elastic connecting piece (1) is mounted between a carburetor (4) and an inlet channel (3) of an internal combustion engine (2). The engine (2) is especially an engine of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece (1) includes a peripherally extending expansion fold (5) arranged between its ends in order to compensate for changes in length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7). The annular gap (28) of the expansion fold (5) can be bridged by a seal lip (8). The connecting piece (1) includes a peripherally extending seal seat (9) of axial length (g) in the region of the expansion fold (5). The seal lip (8) can be placed in seal-tight contact with the seal seat (9) and substantially closes the expansion fold (5) fluid tight to the interior space of the connecting piece (1).
    • 弹性连接件(1)安装在化油器(4)和内燃机(2)的入口通道(3)之间。 发动机(2)特别是诸如电动链锯,切断机等的便携式手持式电动工作装置的发动机。 连接件(1)包括布置在其端部之间的周向延伸的膨胀折叠(5),以补偿长度的变化。 膨胀折叠部(5)将连接件(1)细分成化油器端部(6)并进入发动机端部(7)。 膨胀折叠(5)的环形间隙(28)可以通过密封唇缘(8)桥接。 连接件(1)包括在膨胀折叠(5)的区域中具有轴向长度(g)的周向延伸的密封座(9)。 密封唇缘(8)可以与密封座(9)密封地接触并且基本上封闭流体紧密地连接到连接件(1)的内部空间的膨胀折叠(5)。
    • 9. 发明申请
    • Two-stroke engine
    • 二冲程发动机
    • US20060180106A1
    • 2006-08-17
    • US11302766
    • 2005-12-14
    • Gerhard OsburgWolfgang LuithardtPeter SchmidtTommy RoitschMichael Joos
    • Gerhard OsburgWolfgang LuithardtPeter SchmidtTommy RoitschMichael Joos
    • F02B33/04
    • F02D9/02F02B25/14F02B25/22F02B2075/025F02D2009/0208F02D2009/0272
    • A two-stroke engine has a cylinder in which a combustion chamber is provided. The combustion chamber is delimited by a reciprocating piston that drives with a connecting rod a crankshaft rotatably supported in a crankcase. In predetermined positions of the piston, the crankcase is connected by at least one transfer channel to the combustion chamber. The two-stroke engine has a mixture channel for supplying a fuel/air mixture and an air channel that supplies substantially fuel-free air to the transfer channel. In order to enable in a simple way an adjustment of an air channel to different two-stroke engines of a model range, at one end face of a component in which the air channel is formed a throttle member is arranged that throttles the air flow through the air channel in at least one operating state of the two-stroke engine.
    • 二冲程发动机具有设置有燃烧室的气缸。 燃烧室由一个往复运动的活塞限定,该往复活塞用连杆驱动,曲轴可旋转地支撑在曲轴箱中。 在活塞的预定位置,曲轴箱通过至少一个传送通道连接到燃烧室。 二冲程发动机具有用于供应燃料/空气混合物的混合通道和向输送通道提供基本上无燃料的空气的空气通道。 为了简单地使空气通道能够在模型范围的不同二冲程发动机上的调节,在形成空气通道的部件的一个端面处布置有节流构件,其节流空气流通过 在二冲程发动机的至少一个操作状态下的空气通道。