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公开(公告)号：US20230399973A1
公开(公告)日：2023-12-14
申请号：US18334193
申请日：2023-06-13
发明人： Michael Grether , Robert Koehli , Richard Wirt , Bernd Engel
CPC分类号： F02B33/02 , F02B75/02 , F02B2075/025
摘要： A two-stroke engine possesses a cylinder, in the cylinder bore of which a combustion chamber is formed. The combustion chamber is bounded by a reciprocating piston, which drives a crankshaft rotatably mounted in a crankcase. A crankcase interior is fluidically connected to the combustion chamber across at least one transfer channel in at least one position of the piston. The at least one transfer channel emerges with a discharge opening in the crankcase interior and with at least one transfer window on the cylinder bore. It is proposed that all transfer channels have an average length as measured from the discharge opening to the transfer window, the average length being at least 1.5 in relation to the stroke, and that the volume of the crankcase interior including all transfer channels is at most 3.1 in relation to the piston displacement.
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公开(公告)号：US20130312267A1
公开(公告)日：2013-11-28
申请号：US13899609
申请日：2013-05-22
发明人： Bernd Engel
IPC分类号： B27B17/12
摘要： A motor chain saw has a first driven sprocket wheel driving a saw chain lubricated via a supply pump driven by first and second drive wheel, wherein the second drive wheel is connected to the first sprocket wheel. A drive element with coupling section is connected to the first sprocket wheel and the second drive wheel is formed on the drive element. A second sprocket wheel can be used in place of the first sprocket wheel. The first and second sprocket wheels have different geometries. The coupling section has first and second followers correlated with follower surfaces of the first and second sprocket wheels. The coupling section contacts with first followers the follower surfaces of the first sprocket wheel or with second followers the follower surfaces of the second sprocket wheel when used in place of the first sprocket wheel.
摘要翻译： 电动链锯具有驱动通过由第一和第二驱动轮驱动的供给泵润滑的锯链的第一从动链轮，其中第二驱动轮连接到第一链轮。 具有联接部分的驱动元件连接到第一链轮，并且第二驱动轮形成在驱动元件上。 可以使用第二链轮代替第一链轮。 第一和第二链轮具有不同的几何形状。 联接部分具有与第一和第二链轮的从动表面相关联的第一和第二跟随器。 当代替第一链轮时，联接部分与第一链轮的从动表面或第二从动件与第二链轮的从动表面接触。
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公开(公告)号：US11441518B2
公开(公告)日：2022-09-13
申请号：US17377095
申请日：2021-07-15
发明人： Michael Grether , Bernd Engel
摘要： A carburetor has a carburetor body wherein an intake channel is formed. A throttle flap is pivotably mounted by a throttle shaft in the carburetor body for controlling the free flow cross-section of the intake channel. The intake channel has a first longitudinal center axis in the region of the throttle shaft. The throttle flap has first and second end positions, wherein the throttle flap opens a larger flow cross-section of the intake channel in the second end position than in the first end position. A partition wall section, on which the throttle flap lies in the second end position, is arranged upstream of the throttle shaft. A choke flap is upstream of the partition wall section and is pivotable between first and second end positions. In their second end positions, the throttle flap and the choke flap overlap in the direction of the first longitudinal center axis.
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公开(公告)号：US20220025837A1
公开(公告)日：2022-01-27
申请号：US17377095
申请日：2021-07-15
发明人： Michael Grether , Bernd Engel
摘要： A carburetor has a carburetor body wherein an intake channel is formed. A throttle flap is pivotably mounted by a throttle shaft in the carburetor body for controlling the free flow cross-section of the intake channel. The intake channel has a first longitudinal center axis in the region of the throttle shaft. The throttle flap has first and second end positions, wherein the throttle flap opens a larger flow cross-section of the intake channel in the second end position than in the first end position. A partition wall section, on which the throttle flap lies in the second end position, is arranged upstream of the throttle shaft. A choke flap is upstream of the partition wall section and is pivotable between first and second end positions. In their second end positions, the throttle flap and the choke flap overlap in the direction of the first longitudinal center axis.
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公开(公告)号：US09731431B2
公开(公告)日：2017-08-15
申请号：US13899609
申请日：2013-05-22
发明人： Bernd Engel
摘要： A motor chain saw has a first driven sprocket wheel driving a saw chain lubricated via a supply pump driven by first and second drive wheel, wherein the second drive wheel is connected to the first sprocket wheel. A drive element with coupling section is connected to the first sprocket wheel and the second drive wheel is formed on the drive element. A second sprocket wheel can be used in place of the first sprocket wheel. The first and second sprocket wheels have different geometries. The coupling section has first and second followers correlated with follower surfaces of the first and second sprocket wheels. The coupling section contacts with first followers the follower surfaces of the first sprocket wheel or with second followers the follower surfaces of the second sprocket wheel when used in place of the first sprocket wheel.
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公开(公告)号：US11952937B2
公开(公告)日：2024-04-09
申请号：US18334193
申请日：2023-06-13
发明人： Michael Grether , Robert Koehli , Richard Wirt , Bernd Engel
CPC分类号： F02B33/02 , F02B75/02 , F02B2075/025
摘要： A two-stroke engine possesses a cylinder, in the cylinder bore of which a combustion chamber is formed. The combustion chamber is bounded by a reciprocating piston, which drives a crankshaft rotatably mounted in a crankcase. A crankcase interior is fluidically connected to the combustion chamber across at least one transfer channel in at least one position of the piston. The at least one transfer channel emerges with a discharge opening in the crankcase interior and with at least one transfer window on the cylinder bore. It is proposed that all transfer channels have an average length as measured from the discharge opening to the transfer window, the average length being at least 1.5 in relation to the stroke, and that the volume of the crankcase interior including all transfer channels is at most 3.1 in relation to the piston displacement.
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公开(公告)号：US20220025836A1
公开(公告)日：2022-01-27
申请号：US17380800
申请日：2021-07-20
发明人： Michael Grether , Bernd Engel
摘要： A fuel supply device has a base body, in which an intake channel section is formed. At least one adjustable throttle element for controlling the free flow cross section of the intake channel section is provided. At least one fuel opening opens into the intake channel section. A partition wall section is arranged in the intake channel section upstream of the throttle element. The partition wall section and the throttle element divide, in a completely open position of the throttle element, the intake channel section upstream of the throttle element into a mixture channel, into which the fuel opening feeds fuel, and an air channel. In order to improve the cooling of the fuel supply device, the partition wall section has at least one element for increasing the surface area within the mixture channel.
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