公开(公告)号：US07131406B2

公开(公告)日：2006-11-07

申请号：US10347741

申请日：2003-01-17

申请人： Bernhard Dürr ,  Harald Schliemann ,  Jörg Schlossarczyk ,  Werner Geyer

发明人： Bernhard Dürr ,  Harald Schliemann ,  Jörg Schlossarczyk ,  Werner Geyer

IPC分类号： F02B25/14

CPC分类号： F02B33/04 ,  F02B2075/025

摘要： A two-cycle engine in a portable, manually-guided implement, such as a power chain saw, a cut-off machine, a brush cutter, or the like, is provided. The cylinder has a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a crankshaft that is mounted in a crankcase so as to be rotatable about a crankshaft axis. The cylinder has an outlet for conveying exhaust gases out of the combustion chamber, with the outlet having an axis of the channel thereof. The cylinder also has an inlet for supplying a fuel/air mixture to the crankcase. By means of at least two transfer channels, the fuel/air mixture is conveyed out of the crankcase and into the combustion chamber, with the transfer channels being disposed symmetrically relative to the axis of the channel of the outlet. When viewed in the direction of the longitudinal axis of the cylinder, the axis of the channel of the outlet is disposed at an angle of less than 90° relative to the longitudinal central axis of the crankshaft.

公开(公告)号：US06749180B2

公开(公告)日：2004-06-15

申请号：US10369245

申请日：2003-02-14

申请人： Bernhard Dürr ,  Manfred Rabis ,  Werner Geyer

发明人： Bernhard Dürr ,  Manfred Rabis ,  Werner Geyer

IPC分类号： F02M2303

CPC分类号： F02M17/04 ,  F02B63/02 ,  F02B2075/025 ,  F02M23/03 ,  Y02T10/146 ,  Y10S261/01

摘要： A diaphragm carburetor is provided for an internal combustion engine that operates with scavenging air, especially a two-cycle engine in a manually-guided implement. The carburetor has an intake channel portion in which is disposed a butterfly valve that is rotatably held via a shaft and in the vicinity of which fuel-supplying channels open into the intake channel portion. The channels are supplied from a fuel-filled regulating chamber that is formed on a longitudinal side of the intake channel portion in the carburetor housing and is separated by a regulating diaphragm from a compensation chamber. The carburetor has at least one air channel that supplies additional combustion air and that has an air valve that is rotatably held via a shaft. The butterfly valve and the air valve can be brought from a closed position, in which the butterfly valve or the air valve only insignificantly influence the flow in the intake channel portion or in the air channel, into a closed position in which the intake channel portion or the air channel are substantially closed off in an airtight manner, and in an opening direction from the closed position into the opened position. The air valve is coupled to the butterfly valve via a coupling mechanism that compensates for axial and radial tolerances and includes a spring.

摘要翻译： 一种用于内燃机的隔膜式化油器，该内燃机与清扫空气操作，特别是在手动工具中的两冲程发动机。 化油器具有进气通道部分，其中设置有蝶阀，该蝶阀经由轴可旋转地保持，并且其附近的燃料供给通道通向进气通道部分。 通道由燃料填充的调节室供给，该调节室形成在化油器壳体中的进气通道部分的纵向侧，并且通过调节膜片与补偿室隔开。 化油器具有至少一个空气通道，其供应额外的燃烧空气，并且具有通过轴可旋转地保持的空气阀。 蝶阀和空气阀可以从闭合位置进入，其中蝶阀或空气阀仅对进气通道部分或空气通道中的流动无影响地进入关闭位置，在关闭位置，进气通道部分 或者空气通道基本上以气密的方式封闭，并且在从闭合位置到打开位置的打开方向上。 空气阀通过耦合机构联接到蝶阀，该联接机构补偿轴向和径向公差，并且包括弹簧。

公开(公告)号：US06546905B2

公开(公告)日：2003-04-15

申请号：US09944765

申请日：2001-08-31

申请人： Bernhard Dürr ,  Harald Schliemann ,  Manfred Rabis

发明人： Bernhard Dürr ,  Harald Schliemann ,  Manfred Rabis

IPC分类号： F01L118

CPC分类号： F02B63/02 ,  B27B17/0008 ,  F01L1/024 ,  F01L1/12 ,  F01L1/18 ,  F01L1/20 ,  F02B2075/027

摘要： A valve drive mechanism is provided for an internal combustion engine, especially a four-stroke engine in a power chain saw. The implement housing is spanned by a front handle, the tubular grip of which is adjacent to the cylinder head of the engine and extends from one longitudinal side of the implement to the other longitudinal side thereof. A rocker arm of a valve control is pivotably mounted on the cylinder head between the ends of the rocker arm, with the rocker arm being pivotable about a pivot axis disposed transverse to the rocker arm. Push rods of a control mechanism engage one end of the rocker arm to actuate a poppet valve, on the valve stem of which the other end of the rocker arm acts. To be able to guide the tubular grip close to the center of gravity of the implement, the longitudinal axis of the rocker arm is disposed approximately parallel to the adjacent portion of the tubular grip.

公开(公告)号：US06393835B1

公开(公告)日：2002-05-28

申请号：US09762048

申请日：2001-04-06

申请人： Gerhard Stoll ,  Wolf Burger ,  Gustav Wölpert ,  Thomas Rieger ,  Ronald Hotz ,  Bernhard Dürr

发明人： Gerhard Stoll ,  Wolf Burger ,  Gustav Wölpert ,  Thomas Rieger ,  Ronald Hotz ,  Bernhard Dürr

IPC分类号： F01N310

CPC分类号： F01N13/002 ,  F01N3/06 ,  F01N3/2053 ,  F01N3/2885 ,  F01N13/1894 ,  F01N2450/20 ,  F01N2450/24 ,  F01N2470/04 ,  F01N2470/06 ,  F01N2470/10 ,  F01N2490/08 ,  F01N2590/06 ,  F02B63/02 ,  F02B2075/025 ,  F02B2075/027

摘要： The invention relates to an exhaust-gas muffler on an internal combustion engine in a motor chain saw. The exhaust-gas muffler includes a housing (1) which is assembled of two housing shells (2, 3). The one housing shell (2) has an exhaust-gas inlet (4) and the other housing shell (3) has an exhaust-gas outlet (5). An inner wall (8) as well as a catalytic converting element (7) are provided in the inner space (6) of the muffler housing (1). The catalytic converting element (7) is mounted between the exhaust-gas inlet (4) and the exhaust-gas outlet (5). In order to ensure an adequate catalytic converting treatment of the exhaust gas at low gas counterpressure, it is provided to divide the entering exhaust-gas flow (10) and to conduct at least one of these component flows (23) in contact with the catalytic converting element (7). The component flows (22, 23) are brought together and mixed with other before exiting from the muffler housing (1).

摘要翻译： 本发明涉及一种电动链锯内燃机上的排气消声器。 排气消声器包括由两个壳体（2,3）组装的壳体（1）。 一个壳体（2）具有废气入口（4），另一个壳体（3）具有废气出口（5）。 在消声器壳体（1）的内部空间（6）中设置内壁（8）以及催化转化元件（7）。 催化转化元件（7）安装在废气入口（4）和废气出口（5）之间。 为了确保在低气体反压下对废气进行适当的催化转化处理，提供了对进入的废气流（10）进行分割，并且使这些组分流（23）中的至少一个与催化剂接触 转换元件（7）。 在从消声器壳体（1）离开之前，将部件流动（22,23）与其它流体（22,23）混合在一起。

公开(公告)号：US06363618B1

公开(公告)日：2002-04-02

申请号：US09518714

申请日：2000-03-03

申请人： Bernhard Dürr

发明人： Bernhard Dürr

IPC分类号： F02F700

CPC分类号： F02B63/02 ,  F02F7/0085 ,  F05C2225/08

摘要： A manually guided, portable implement, especially a power saw, is provided. The implement has a cylinder and a crankshaft that is connected to a piston via a piston rod. The implement has an essentially plastic housing as well as a lower crankcase. A stabilizing plate is nearly entirely embedded in the material of the lower crankcase. The one-piece stabilizing plate is provided with support sockets for bolting the lower crankcase to the cylinder. An overall metallic screw connection can thus be established.

摘要翻译： 提供了一种手动导向的便携式工具，特别是电动锯。 工具具有通过活塞杆连接到活塞的气缸和曲轴。 该工具具有基本上塑料的外壳以及下部的曲轴箱。 稳定板几乎完全嵌入在下曲轴箱的材料中。 一体式稳定板设有用于将下曲轴箱螺栓连接到气缸的支撑插座。 因此可以建立整体的金属螺丝连接。