Handheld work apparatus having an air-cooled combustion engine
    1.
    发明授权
    Handheld work apparatus having an air-cooled combustion engine 有权
    具有风冷式内燃机的手持式工作装置

    公开(公告)号:US09140204B2

    公开(公告)日:2015-09-22

    申请号:US12926194

    申请日:2010-11-01

    摘要: A portable, handheld work apparatus such as a chain saw has a handle (5, 7) to guide the work apparatus (1) and has an air-cooled, mixture-lubricated combustion engine (10) arranged in a casing as a drive for a work tool (3). The cylinder (11) has a combustion chamber (13) formed therein to which an air/fuel mixture is supplied. The air/fuel mixture is ignited by a spark plug (23) which projects into the combustion chamber (13). An ignition control (30) triggers a spark in dependence on the angular position of the crankshaft (15). A temperature sensor (35, 45, 55) is provided to control the cylinder temperature. The temperature signal of the temperature sensor (35, 45, 55) is connected to a power control (40). When a predetermined temperature is exceeded, the power control (40) changes the operating parameters of the combustion engine (10) in such a manner that the power of the combustion engine (10) is changed.

    摘要翻译: 便携式手持式工作装置如链锯具有手柄(5,7)以引导工作装置(1),并且具有设置在外壳中的风冷混合润滑的内燃机(10)作为驱动装置 工作工具(3)。 气缸(11)具有形成在其中供给空气/燃料混合物的燃烧室(13)。 空气/燃料混合物被突出到燃烧室(13)中的火花塞(23)点燃。 点火控制器(30)根据曲轴(15)的角位置触发火花。 提供温度传感器(35,45,55)来控制气缸温度。 温度传感器(35,45,55)的温度信号连接到功率控制器(40)。 当超过预定温度时,功率控制(40)以改变内燃机(10)的功率的方式改变内燃机(10)的操作参数。

    Method for operating a two-stroke engine
    2.
    发明申请
    Method for operating a two-stroke engine 有权
    二冲程发动机的运行方法

    公开(公告)号:US20100307469A1

    公开(公告)日:2010-12-09

    申请号:US12801135

    申请日:2010-05-25

    IPC分类号: F02B33/04

    CPC分类号: F02B25/00 F02B2075/025

    摘要: A two-stroke engine (1) has a cylinder (2) defining a combustion chamber (3) delimited by a piston (5). The piston (5) drives a crankshaft (7) which is rotatably journalled in a crankcase (4). The crankcase (4) is connected to the combustion chamber (3) via a transfer channel (17) at at least one position of the piston. The two-stroke engine has an inlet (11) into the crankcase (4) and an outlet (19) from the combustion chamber. There is an arrangement to supply fuel, a control, and a device to determine the crankcase pressure (pKGH). A method to operate the two-stroke engine (1) includes determining the crankcase pressure (pKGH) during every engine cycle. The fluctuation in the crankcase pressure (pKGH) is determined and the fluctuation is compared to a limit value (Δplimit) to determine whether a combustion occurs during every engine cycle. In this way, a determination can be reliably made as to whether the two-stroke engine is running in a four-stroke mode.

    摘要翻译: 二冲程发动机(1)具有限定由活塞(5)限定的燃烧室(3)的气缸(2)。 活塞(5)驱动可旋转地轴颈安装在曲轴箱(4)中的曲轴(7)。 曲轴箱(4)在活塞的至少一个位置处经由输送通道(17)连接到燃烧室(3)。 二冲程发动机具有进入曲轴箱(4)的入口(11)和来自燃烧室的出口(19)。 有一种供应燃料,控制装置和装置以确定曲轴箱压力(pKGH)的装置。 操作二冲程发动机(1)的方法包括在每个发动机循环期间确定曲轴箱压力(pKGH)。 确定曲轴箱压力(pKGH)的波动,并将波动与极限值(&Dgr; plimit)进行比较,以确定在每个发动机循环期间是否发生燃烧。 以这种方式,可以可靠地确定二冲程发动机是否以四冲程模式行驶。

    Method for operating a two-stroke engine
    3.
    发明授权
    Method for operating a two-stroke engine 有权
    二冲程发动机的运行方法

    公开(公告)号:US08555831B2

    公开(公告)日:2013-10-15

    申请号:US12801135

    申请日:2010-05-25

    IPC分类号: F02B25/00

    CPC分类号: F02B25/00 F02B2075/025

    摘要: A two-stroke engine (1) has a cylinder (2) defining a combustion chamber (3) delimited by a piston (5). The piston (5) drives a crankshaft (7) which is rotatably journalled in a crankcase (4). The crankcase (4) is connected to the combustion chamber (3) via a transfer channel (17) at at least one position of the piston. The two-stroke engine has an inlet (11) into the crankcase (4) and an outlet (19) from the combustion chamber. There is an arrangement to supply fuel, a control, and a device to determine the crankcase pressure (pKGH). A method to operate the two-stroke engine (1) includes determining the crankcase pressure (pKGH) during every engine cycle. The fluctuation in the crankcase pressure (pKGH) is determined and the fluctuation is compared to a limit value (Δplimit) to determine whether a combustion occurs during every engine cycle. In this way, a determination can be reliably made as to whether the two-stroke engine is running in a four-stroke mode.

    摘要翻译: 二冲程发动机(1)具有限定由活塞(5)限定的燃烧室(3)的气缸(2)。 活塞(5)驱动可旋转地轴颈安装在曲轴箱(4)中的曲轴(7)。 曲轴箱(4)在活塞的至少一个位置处经由输送通道(17)连接到燃烧室(3)。 二冲程发动机具有进入曲轴箱(4)的入口(11)和来自燃烧室的出口(19)。 有一种供应燃料,控制装置和装置以确定曲轴箱压力(pKGH)的装置。 操作二冲程发动机(1)的方法包括在每个发动机循环期间确定曲轴箱压力(pKGH)。 确定曲轴箱压力(pKGH)的波动,并将波动与极限值(Deltaplimit)进行比较,以确定在每个发动机循环期间是否发生燃烧。 以这种方式,可以可靠地确定二冲程发动机是否以四冲程模式行驶。

    Handheld work apparatus having an air-cooled combustion engine
    4.
    发明申请
    Handheld work apparatus having an air-cooled combustion engine 有权
    具有风冷式内燃机的手持式工作装置

    公开(公告)号:US20110107985A1

    公开(公告)日:2011-05-12

    申请号:US12926194

    申请日:2010-11-01

    IPC分类号: F02D35/02 F01P5/02 F02B75/12

    摘要: The invention relates to a portable, handheld work apparatus such as a chain saw having a handle (5, 7) to guide the work apparatus (1) and having an air-cooled, mixture lubricated combustion engine (10) arranged in a casing as a drive for a work tool (3). The cylinder (11) has a combustion chamber (13) formed therein to which an air/fuel mixture is supplied. The air/fuel mixture is ignited by a spark plug (23) which projects into the combustion chamber (13). An ignition control (30) triggers a spark in dependence on the angular position of the crankshaft (15). A temperature sensor (34, 45, 55) is provided to control the cylinder temperature. The temperature signal of the temperature sensor (34, 45, 55) is connected to a power control (40). When a predetermined temperature is exceeded, the power control (40) changes the operating parameters of the combustion engine (10) in such a manner that the power of the combustion engine (10) is changed.

    摘要翻译: 本发明涉及一种便携式手持式工作装置,例如具有手柄(5,7)的链锯,用于引导工作装置(1)并具有布置在壳体中的风冷混合润滑的内燃机(10) 一个工具的驱动(3)。 气缸(11)具有形成在其中供给空气/燃料混合物的燃烧室(13)。 空气/燃料混合物被突出到燃烧室(13)中的火花塞(23)点燃。 点火控制器(30)根据曲轴(15)的角位置触发火花。 提供温度传感器(34,45,55)以控制气缸温度。 温度传感器(34,45,55)的温度信号连接到功率控制器(40)。 当超过预定温度时,功率控制(40)以改变内燃机(10)的功率的方式改变内燃机(10)的操作参数。

    DEVICE AND METHOD FOR OPERATING A HAND-HELD WORKING APPARATUS
    5.
    发明申请
    DEVICE AND METHOD FOR OPERATING A HAND-HELD WORKING APPARATUS 审中-公开
    用于操作手持式工作装置的装置和方法

    公开(公告)号:US20130151126A1

    公开(公告)日:2013-06-13

    申请号:US13693447

    申请日:2012-12-04

    IPC分类号: F02D45/00

    摘要: A hand-held working apparatus has an internal combustion engine having a crankshaft which is driven in rotation. The crankshaft drives at least one tool of the working apparatus via a centrifugal clutch. The working apparatus has a device for determining the speed of the internal combustion engine and a control device which controls the internal combustion engine. It is provided that the profile of the speed of the internal combustion engine is evaluated by the control device, and that the engagement speed of the centrifugal clutch is determined from the profile of the speed of the internal combustion engine. A method of operation is also provided.

    摘要翻译: 手持式工作装置具有内燃机,该内燃机具有旋转驱动的曲轴。 曲轴通过离心式离合器驱动工作装置的至少一个工具。 工作装置具有用于确定内燃机的速度的装置和控制内燃机的控制装置。 通过控制装置来评价内燃机的速度分布,离心式离合器的接合速度由内燃机的速度的曲线确定。 还提供了一种操作方法。

    Laser-based device for non-mechanical, three-dimensional trepanation during cornea transplants
    6.
    发明申请
    Laser-based device for non-mechanical, three-dimensional trepanation during cornea transplants 审中-公开
    基于激光的装置,用于在角膜移植期间进行非机械,三维平移

    公开(公告)号:US20060100612A1

    公开(公告)日:2006-05-11

    申请号:US10525391

    申请日:2003-08-16

    IPC分类号: A61B18/18

    摘要: A laser-based device for non-mechanical, three-dimensional trepanation during cornea transplants comprises a computer-assisted control and regulation unit (4) provided with at least one control computer (5, 6, 7) and at least one display unit (8, 9), as well as a laser source (2) for generating a working laser beam (3) as well as a multi-sensor processing head (1) integrated into which are: an axial beam positioning system (11) into which the working laser beam (3) can be coupled, a focal point tracking unit (12) for the z-position displacement of the focal point (13) of the working laser beam (3) an x-y-scanner unit (14, 15) for the x and y-position displacement of the working laser beam (3), an eye position sensor unit (23, 24, 35, 36) for detection of the position of the eye, and a plasma sensor unit (16, 25) for detection of the plasma glow that occurs during the cornea trepanation.

    摘要翻译: 用于角膜移植期间的非机械三维交配的基于激光的装置包括设置有至少一个控制计算机(5,6,7)和至少一个显示单元(4)的计算机辅助控制和调节单元(4) 8,9)以及用于产生工作激光束(3)的激光源(2)以及集成在其中的多传感器处理头(1),其中:轴向光束定位系统(11) 可以耦合工作激光束(3),用于工作激光束(3)的焦点(13)的z位移的焦点跟踪单元(12),xy扫描器单元(14,15) 对于工作激光束(3)的x和y位置位移,用于检测眼睛位置的眼睛位置传感器单元(23,24,35,36)和等离子体传感器单元(16,25) 用于检测在角膜交配期间发生的等离子体辉光。