Method for switching off a rotational speed limit in an internal combustion engine
    1.
    发明授权
    Method for switching off a rotational speed limit in an internal combustion engine 有权
    用于切断内燃机的转速极限的方法

    公开(公告)号:US09322329B2

    公开(公告)日:2016-04-26

    申请号:US13956088

    申请日:2013-07-31

    IPC分类号: F02B63/02 F02D31/00

    CPC分类号: F02B63/02 F02D31/009

    摘要: A method controls the rpm of a combustion engine in a hand-held work apparatus such as a brushcutter. The engine drives a work tool via a clutch which engages as a function of the engine rpm (n). A spark plug is arranged in the combustion chamber and is driven by an ignition unit. During start of the engine, an rpm lock circuit is active and defines a control variable as a function of the instantaneous rpm (nact) of the engine. According to the magnitude of this control variable, operating parameters of the engine are adapted to change the instantaneous rpm (nact). A control variable is determined for the adaptation of the operating parameters by the rpm lock circuit. The switch-off of the rpm lock circuit is provided when the control variable of the control lies outside a predetermined bandwidth of the absolute magnitude of the control variables.

    摘要翻译: 一种方法控制诸如刷子之类的手持式工作装置中的内燃机的转速。 发动机通过作为发动机转速(n)的函数进行啮合的离合器驱动作业工具。 火花塞设置在燃烧室中并由点火单元驱动。 在发动机启动期间,转速锁定电路是有效的,并且根据发动机的瞬时转速(nact)定义控制变量。 根据该控制变量的大小,发动机的运行参数适于改变瞬时转速(nact)。 确定由rpm锁定电路适应操作参数的控制变量。 当控制的控制变量位于控制变量的绝对大小的预定带宽之外时,提供转速锁定电路的关断。

    WORK APPARATUS AND METHOD FOR DETERMINING THE STARTING CONDITIONS THEREOF
    3.
    发明申请
    WORK APPARATUS AND METHOD FOR DETERMINING THE STARTING CONDITIONS THEREOF 有权
    用于确定其启动条件的工作装置和方法

    公开(公告)号:US20150198129A1

    公开(公告)日:2015-07-16

    申请号:US14597891

    申请日:2015-01-15

    IPC分类号: F02N11/08

    摘要: A work apparatus has an internal combustion engine and a starter device for starting the engine. Within a housing of the work apparatus, a first electrical component is arranged at a first location and a second electrical component is arranged at a second location. A control unit is provided which is connected to the first electrical component and to the second electrical component. The control unit detects a first temperature-dependent value of the first electrical component at the first location, and a second temperature-dependent value of the second electrical component at the second location, and identifies the starting conditions as a function of these values. The first electrical component is a first actuator and the second electrical component is a second actuator or a sensor.

    摘要翻译: 工作装置具有用于起动发动机的内燃机和起动装置。 在工作装置的壳体内,第一电气部件布置在第一位置处,并且第二电气部件布置在第二位置。 提供了连接到第一电气部件和第二电气部件的控制单元。 控制单元检测第一位置处的第一电气部件的第一温度相关值,以及第二位置处的第二电气部件的第二温度相关值,并且识别起始条件作为这些值的函数。 第一电气部件是第一致动器,第二电气部件是第二致动器或传感器。

    METHOD FOR SWITCHING OFF A ROTATIONAL SPEED LIMIT IN AN INTERNAL COMBUSTION ENGINE
    5.
    发明申请
    METHOD FOR SWITCHING OFF A ROTATIONAL SPEED LIMIT IN AN INTERNAL COMBUSTION ENGINE 有权
    在内燃机中切换旋转速度限制的方法

    公开(公告)号:US20140034011A1

    公开(公告)日:2014-02-06

    申请号:US13956088

    申请日:2013-07-31

    IPC分类号: F02B63/02

    CPC分类号: F02B63/02 F02D31/009

    摘要: A method controls the rpm of a combustion engine in a hand-held work apparatus such as a brushcutter. The engine drives a work tool via a clutch which engages as a function of the engine rpm (n). A spark plug is arranged in the combustion chamber and is driven by an ignition unit. During start of the engine, an rpm lock circuit is active and defines a control variable as a function of the instantaneous rpm (nact) of the engine. According to the magnitude of this control variable, operating parameters of the engine are adapted to change the instantaneous rpm (nact). A control variable is determined for the adaptation of the operating parameters by the rpm lock circuit. The switch-off of the rpm lock circuit is provided when the control variable of the control lies outside a predetermined bandwidth of the absolute magnitude of the control variables.

    摘要翻译: 一种方法控制诸如刷子之类的手持式工作装置中的内燃机的转速。 发动机通过作为发动机转速(n)的函数进行啮合的离合器驱动作业工具。 火花塞设置在燃烧室中并由点火单元驱动。 在发动机启动期间,转速锁定电路是有效的,并且根据发动机的瞬时转速(nact)定义控制变量。 根据该控制变量的大小,发动机的运行参数适于改变瞬时转速(nact)。 确定由rpm锁定电路适应操作参数的控制变量。 当控制的控制变量位于控制变量的绝对大小的预定带宽之外时,提供转速锁定电路的关断。

    HANDHELD WORK APPARATUS
    6.
    发明申请
    HANDHELD WORK APPARATUS 有权
    手提工具

    公开(公告)号:US20130199812A1

    公开(公告)日:2013-08-08

    申请号:US13758607

    申请日:2013-02-04

    IPC分类号: F02D31/00

    摘要: A handheld work apparatus has a combustion engine (4) for driving a tool. The combustion engine (4) has an ignition device, a device for metering fuel and a control device (31). The control device (31) engages when an engagement speed (nE1, nE2) is reached, in order to limit the speed (n) of the combustion engine (4). In order to allow the speed (n) to be set in an easy manner at full throttle, the work apparatus has a device for setting the engagement speed (nE2) by the user.

    摘要翻译: 手持式作业装置具有用于驱动工具的内燃机(4)。 内燃机(4)具有点火装置,用于计量燃料的装置和控制装置(31)。 当达到接合速度(nE1,nE2)时,为了限制内燃机(4)的速度(n),控制装置(31)接合。 为了使速度(n)以全速度方式容易地设定,作业装置具有用于设定使用者的接合速度(nE2)的装置。