公开(公告)号：US09109569B2

公开(公告)日：2015-08-18

申请号：US13474965

申请日：2012-05-18

申请人： Niels Kunert ,  Jürgen Aupperle ,  Michael Grether

发明人： Niels Kunert ,  Jürgen Aupperle ,  Michael Grether

IPC分类号： F02P5/00 ,  F02P5/15 ,  F02P5/02 ,  F02P5/04 ,  F02P3/055 ,  F02B63/02

CPC分类号： F02P5/1508 ,  F02B63/02 ,  F02D2400/06 ,  F02P3/055 ,  F02P5/02 ,  F02P5/04 ,  F02P5/1504 ,  F02P5/1506 ,  Y02T10/46

摘要： A working apparatus has an internal combustion engine which drives at least one tool via a clutch. The clutch starts the coupling process at an initial engagement speed when the internal combustion engine is accelerated. The internal combustion engine has a piston, an ignition device and an ignition timing control device. The control device provides a first ignition timing for idling and a second ignition timing for full load operation, which is earlier than the first ignition timing. A method for operating the working apparatus provides that the ignition timing is adjusted toward “late,” with respect to the first ignition timing, when the engine speed drops in a first speed range above the idling speed and below the initial engagement speed.

摘要翻译： 工作装置具有通过离合器驱动至少一个工具的内燃机。 当内燃机加速时，离合器以初始接合速度开始联接过程。 内燃机具有活塞，点火装置和点火正时控制装置。 控制装置为空载运行提供第一点火正时和提供比第一点火正时更早的满载运行的第二点火正时。 一种操作该加工装置的方法，其特征在于，当所述发动机转速在空转速度以上且低于初始接合速度的第一速度范围内时，相对于所述第一点火正时，向所述“点火时刻”调整所述点火正时。

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。

公开(公告)号：US20120060381A1

公开(公告)日：2012-03-15

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： B27B17/00 ,  F02B33/04

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。

公开(公告)号：US08967099B2

公开(公告)日：2015-03-03

申请号：US13327020

申请日：2011-12-15

申请人： Michael Grether ,  Niels Kunert ,  Tommy Roitsch ,  Klaus Geyer

发明人： Michael Grether ,  Niels Kunert ,  Tommy Roitsch ,  Klaus Geyer

IPC分类号： F02B25/00 ,  F02B25/20 ,  F02M3/14 ,  F02M35/10 ,  F02B25/14 ,  F02M3/08 ,  F02M29/04 ,  F02M33/04 ,  F02B75/02 ,  F02B33/04 ,  E02D7/12 ,  F02B61/04 ,  F02F1/22

CPC分类号： F02B25/20 ,  E02D7/125 ,  F02B25/14 ,  F02B33/04 ,  F02B61/045 ,  F02B2075/025 ,  F02F1/22 ,  F02M3/08 ,  F02M3/14 ,  F02M29/04 ,  F02M33/046 ,  F02M35/10321 ,  Y02T10/126

摘要： A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element.

摘要翻译： 二冲程发动机包括形成有由活塞界定的燃烧室的气缸和进气通道。 化油器形成进气通道的一部分，其中节流元件可枢转地安装在其中，并且至少一个主燃料开口和至少一个空转燃料开口通向进气通道，该进气通道在化油器的下游分配成空气通道 和混合物通道。 空转燃料开口供给布置在混合通道内的次级通道。 在怠速位置，节气门元件可以布置成与次级通道中的上游入口相邻，并且节流元件可以具有在节流元件的空转位置处布置在入口开口的区域中的开口 并且将次级通道连接到位于节流元件上游的进气通道的区域。

公开(公告)号：US20120060806A1

公开(公告)日：2012-03-15

申请号：US13225864

申请日：2011-09-06

申请人： Niels Kunert

发明人： Niels Kunert

IPC分类号： F02B33/04

CPC分类号： F02B25/14 ,  F01L5/06 ,  F02B1/00 ,  F02B3/00 ,  F02B17/00 ,  F02B25/22 ,  F02B33/04 ,  F02B2075/027

摘要： A two-stroke engine has a cylinder having a cylinder bore with a combustion chamber and an outlet connected with the combustion chamber. A piston is disposed in the cylinder and delimits the combustion chamber. The piston has a piston recess. A crankcase is provided that has a crankshaft rotatably supported therein. The piston drives in rotation the crankshaft. In at least one position of the piston, the crankcase is connected by a transfer passage with the combustion chamber. An air passage is provided as well as a mixture passage that has a mixture inlet that is disposed at the cylinder bore and opens into the cylinder bore and is piston-controlled. The transfer passage is connected by the piston recess to the air passage when the piston is at top dead center. The piston recess has a connection to the mixture inlet in at least one position of the piston.

摘要翻译： 二冲程发动机具有气缸，缸体具有燃烧室和与燃烧室连接的出口。 活塞设置在气缸中并限定燃烧室。 活塞具有活塞凹部。 提供了一种具有可旋转地支撑在其中的曲轴的曲轴箱。 活塞驱动曲轴旋转。 在活塞的至少一个位置，曲轴箱通过与燃烧室的输送通道连接。 提供一个空气通道以及混合通道，该混合通道具有设置在气缸孔处并通向气缸孔并被活塞控制的混合物入口。 当活塞处于上止点时，传送通道通过活塞凹部连接到空气通道。 活塞凹部在活塞的至少一个位置处具有与混合物入口的连接。

公开(公告)号：US08881696B2

公开(公告)日：2014-11-11

申请号：US13225864

申请日：2011-09-06

申请人： Niels Kunert

发明人： Niels Kunert

IPC分类号： F02B17/00 ,  F02B25/22 ,  F02B33/04 ,  F02B25/14 ,  F01L5/06 ,  F02B75/02 ,  F02B3/00 ,  F02B1/00

CPC分类号： F02B25/14 ,  F01L5/06 ,  F02B1/00 ,  F02B3/00 ,  F02B17/00 ,  F02B25/22 ,  F02B33/04 ,  F02B2075/027

摘要： A two-stroke engine has a cylinder having a cylinder bore with a combustion chamber and an outlet connected with the combustion chamber. A piston is disposed in the cylinder and delimits the combustion chamber. The piston has a piston recess. A crankcase is provided that has a crankshaft rotatably supported therein. The piston drives in rotation the crankshaft. In at least one position of the piston, the crankcase is connected by a transfer passage with the combustion chamber. An air passage is provided as well as a mixture passage that has a mixture inlet that is disposed at the cylinder bore and opens into the cylinder bore and is piston-controlled. The transfer passage is connected by the piston recess to the air passage when the piston is at top dead center. The piston recess has a connection to the mixture inlet in at least one position of the piston.

摘要翻译： 二冲程发动机具有气缸，缸体具有燃烧室和与燃烧室连接的出口。 活塞设置在气缸中并限定燃烧室。 活塞具有活塞凹部。 提供了一种具有可旋转地支撑在其中的曲轴的曲轴箱。 活塞驱动曲轴旋转。 在活塞的至少一个位置，曲轴箱通过与燃烧室的输送通道连接。 提供一个空气通道以及混合通道，该混合通道具有设置在气缸孔处并通向气缸孔并被活塞控制的混合物入口。 当活塞处于上止点时，传送通道通过活塞凹部连接到空气通道。 活塞凹部在活塞的至少一个位置处具有与混合物入口的连接。

公开(公告)号：US20110146641A1

公开(公告)日：2011-06-23

申请号：US12968315

申请日：2010-12-15

申请人： Niels Kunert ,  Horst Denner

发明人： Niels Kunert ,  Horst Denner

IPC分类号： F02B25/00 ,  F02F1/00

CPC分类号： F02F1/002 ,  F02B25/02 ,  F02B63/02 ,  F02B2075/025 ,  F02F1/004 ,  F02F1/22

摘要： An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments.

摘要翻译： 内燃机具有带气缸套的气缸和限定燃烧室的往复运动的活塞，并且使曲轴在曲轴箱中旋转。 提供一种用于供应燃料和燃烧空气的装置。 至少一个输送通道连接在曲轴箱内部与燃烧室的至少一个活塞位置上。 传送通道具有通向燃烧室的传送口和通向曲轴箱的开口。 打开和传送端口在圆筒的圆周方向上相对于彼此移位。 气缸套具有活塞支承表面的至少一个段，并形成传送通道的至少一个壁部分。 气缸具有分别实现的上气缸段和下气缸段。 气缸套与上部和下部气缸段分离。

公开(公告)号：US20060107912A1

公开(公告)日：2006-05-25

申请号：US11281412

申请日：2005-11-18

申请人： Florian Hoche ,  Niels Kunert ,  Horst Denner ,  Andre Prager

发明人： Florian Hoche ,  Niels Kunert ,  Horst Denner ,  Andre Prager

IPC分类号： F02B33/04

CPC分类号： F02B25/22 ,  F02B25/14 ,  F02B27/005 ,  F02M35/10039 ,  F02M35/10131 ,  F02M35/1019 ,  F02M35/108 ,  Y02T10/146

摘要： A two-stroke engine includes an air channel for supplying substantially fuel-free combustion air and a mixture channel for supplying an air/fuel mixture. The air channel and the mixture channel connect the cylinder of the two-stroke engine to an air filter. A section of the mixture channel and a section of the air channel are guided in a common component. In order to prevent induction of mixture into the air channel, the length (a) of the mixture channel and the length (b) of the air channel are so matched to each other that the pressure wave in the air channel, which forms during operation, oscillates in phase with the pressure wave formed in the mixture channel. The length (a) of the mixture channel is matched to an optimal fuel induction via the fuel opening. A method for tuning the two-stroke engine provides that the length (a) of the mixture channel is matched to an optimal fuel discharge from the fuel opening in a first step and, in a second step, the length (b) of the air channel is so matched to the length (a) of the mixture channel that the pressure wave in the air channel and the pressure wave in the mixture channel oscillate in phase during operation of the two-stroke engine.

摘要翻译： 二冲程发动机包括用于供应基本上无燃料的燃烧空气的空气通道和用于供应空气/燃料混合物的混合通道。 空气通道和混合通道将二冲程发动机的气缸连接到空气过滤器。 混合通道的一部分和空气通道的一部分在公共部件中被引导。 为了防止混合物引入空气通道，混合通道的长度（a）和空气通道的长度（b）彼此匹配，使得在操作期间形成的空气通道中的压力波 ，与混合通道中形成的压力波同相振荡。 混合通道的长度（a）与通过燃料开口的最佳燃料感应相匹配。 一种用于调节二冲程发动机的方法，在第一步骤中混合通道的长度（a）与来自燃料开口的最佳燃料排放相匹配，而在第二步骤中，空气的长度（b） 通道与混合通道的长度（a）匹配，使得空气通道中的压力波和混合通道中的压力波在二冲程发动机的操作期间相位振荡。

公开(公告)号：US07044091B2

公开(公告)日：2006-05-16

申请号：US11011709

申请日：2004-12-14

申请人： Florian Hoche ,  Niels Kunert ,  Horst Denner

发明人： Florian Hoche ,  Niels Kunert ,  Horst Denner

IPC分类号： F02F1/22 ,  B23P11/00

CPC分类号： F02F1/04 ,  F02F1/22 ,  Y10T29/49272

摘要： A cylinder for an internal combustion engine of a manually guided implement, and a method of producing such a cylinder, are provided. A cast cylinder body that peripherally delineates a cylinder chamber has formed therein at least one transfer channel that is open inwardly into the cylinder chamber and includes a central portion, extending approximately parallel to the cylinder axis, and a head portion that above the central portion faces in the direction of the cylinder chamber. A cylindrical sleeve covers the central portion of the transfer channel inwardly in the direction of the chamber. The sleeve extends in the direction of the cylinder axis beyond the central portion and ends below the head portion.

摘要翻译： 提供了一种用于手动导向工具的内燃机的气缸，以及一种制造这种气缸的方法。 外围描绘气缸室的铸造缸体在其中形成有至少一个向内开口到气缸室中的传送通道，并且包括大致平行于气缸轴线延伸的中心部分，以及在中心部分面上方的头部 在气缸室的方向。 圆柱形套筒沿着腔室的方向向内覆盖传送通道的中心部分。 套筒在气缸轴线的方向上延伸超过中心部分并且在头部部分的下方延伸。

公开(公告)号：US08616164B2

公开(公告)日：2013-12-31

申请号：US12155165

申请日：2008-05-30

申请人： Niels Kunert ,  Werner Geyer ,  Markus Maurer

发明人： Niels Kunert ,  Werner Geyer ,  Markus Maurer

IPC分类号： F02B33/04 ,  F02B25/00

CPC分类号： F02B25/22 ,  F02B25/14 ,  F02B2075/025

摘要： An internal combustion engine has a cylinder (2) wherein a combustion chamber (3) is formed which is delimited by a piston (5) journalled to move back and forth. At least one transfer channel (14) is provided which connects the crankcase (4) of the engine to the combustion chamber (3) in at least one position of the piston (5). The engine has a supply channel (13) which opens with a supply channel inlet (11) at the cylinder bore (34). The supply channel (13) is connected to the transfer channel (14) via at least one piston pocket (22, 42) in at least one position of the piston (5). In order to achieve low exhaust-gas values of the engine, the piston pocket (22, 42) has a distance (a) to a lower edge (27) of the transfer window (15) which is less than the distance (b) to a lower edge (26) of the inlet (11) of the supply channel at bottom dead center of the piston (5). A method for operating an engine provides that the piston pocket (22, 42) is first connected to the transfer window (15) and then to the supply channel inlet (11) during the upward stroke of the piston (5).

摘要翻译： 内燃机具有气缸（2），其中形成燃烧室（3），所述燃烧室（3）由活塞（5）限定，活塞（5）被前后移动。 提供了至少一个传送通道（14），其在发动机的曲轴箱（4）在活塞（5）的至少一个位置处连接到燃烧室（3）。 发动机具有在气缸孔（34）处与供应通道入口（11）打开的供应通道（13）。 供应通道（13）经由活塞（5）的至少一个位置中的至少一个活塞袋（22,42）连接到传送通道（14）。 为了实现发动机的低废气值，活塞袋（22,42）与传送窗（15）的下边缘（27）的距离（a）小于距离（b） 到活塞（5）的下止点处的供应通道的入口（11）的下边缘（26）。 一种用于操作发动机的方法提供了活塞袋（22,42）在活塞（5）的向上行程期间首先连接到传送窗（15），然后连接到供应通道入口（11）。