Intake system for the combustion air of an internal combustion engine in a portable handheld work apparatus
    11.
    发明授权
    Intake system for the combustion air of an internal combustion engine in a portable handheld work apparatus 有权
    用于便携式手持式工作装置中的内燃机的燃烧空气的进气系统

    公开(公告)号:US06681726B2

    公开(公告)日:2004-01-27

    申请号:US10162898

    申请日:2002-06-06

    IPC分类号: F01P704

    摘要: The invention relates to an intake system (1) for the combustion air (2) of an internal combustion engine (3) in a portable handheld work apparatus (4). The intake system (19) includes a filter housing (5) having an air filter (6) for purifying the combustion air (2). The clean space (8) of the air filter (6) is fluidly connected to an outlet opening (10) of the filter housing (5). The outlet opening (10) communicates with a carburetor (7) of the engine (3). A centrifugal-force separator (13) is mounted forward of the air filter (6) for separating large amounts of dust in the inducted combustion air (2). The separator (13) is so positioned ahead of the filter housing (5) that a central core flow (14) of the separator has a lower particle density (15) and is supplied to the filter (6). A tangential flow (16) surrounds the central core flow (14) in the interior of the separator (13). The tangential flow (16) has a great amount of dust or dirt and is conducted away via the suction side (11) of a blower (12), especially of a cooling-air blower (19) of the engine (3) having vanes on the back side thereof.

    摘要翻译: 本发明涉及一种用于便携式手持式工作装置(4)中的内燃机(3)的燃烧空气(2)的进气系统(1)。 进气系统(19)包括具有用于净化燃烧空气(2)的空气过滤器(6)的过滤器壳体(5)。 空气过滤器(6)的清洁空间(8)流体地连接到过滤器壳体(5)的出口(10)。 出口(10)与发动机(3)的化油器(7)连通。 离心力分离器(13)安装在空气过滤器(6)的前方,用于分离引入的燃烧空气(2)中的大量灰尘。 分离器(13)位于过滤器壳体(5)的前方,使得分离器的中心芯流(14)具有较低的颗粒密度(15)并且被供应到过滤器(6)。 切向流(16)包围分离器(13)内部的中心芯流(14)。 切向流(16)具有大量的灰尘或污垢,并且经由鼓风机12的吸入侧(11),特别是发动机(3)的冷却风扇(19)的吸入侧(11)导出,该鼓风机具有叶片 在其背面。

    Two-stroke engine
    12.
    发明授权
    Two-stroke engine 有权
    二冲程发动机

    公开(公告)号:US06415750B2

    公开(公告)日:2002-07-09

    申请号:US09795390

    申请日:2001-03-01

    IPC分类号: F02B2520

    摘要: A two-stroke engine for a portable two-stroke engine in a portable handheld work apparatus includes a combustion chamber (3) formed in a cylinder (2). The combustion chamber (3) is delimited by the piston (5) which drives the crankshaft (7) via a connecting rod (6). The two-stroke engine includes several transfer channels (14), which, referred to a symmetry plane (49), lie on opposite sides (47, 48) with the plane partitioning approximately the outlet (10). The transfer channels (14) connect the crankcase (4) to the combustion chamber (3). A first end (20) of each transfer channel (14) opens via an entry window (12, 15) into the combustion chamber (3) and the second end (19) of each transfer channel opens to the crankcase (4). Each transfer channel (14) is connected, between its ends (19, 20), to an air channel (22a, 22b) via a membrane valve (21). Air is supplied by the air channel (22a, 22b) via an adjustable throttle (31, 32).

    摘要翻译: 用于便携式手持式工作装置中的便携式二冲程发动机的二冲程发动机包括形成在气缸(2)中的燃烧室(3)。 燃烧室(3)由经由连杆(6)驱动曲轴(7)的活塞(5)限定。 二冲程发动机包括几个传递通道(14),其被称为对称平面(49),位于相对侧(47,48)上,其中平面大致分开出口(10)。 传送通道(14)将曲轴箱(4)连接到燃烧室(3)。 每个传送通道(14)的第一端(20)经由进入窗口(12,15)进入燃烧室(3)并且每个传送通道的第二端(19)通向曲轴箱(4)。 每个传送通道(14)通过膜阀(21)在其端部(19,20)之间连接到空气通道(22a,22b)。 空气通过空气通道(22a,22b)经由可调节的节流阀(31,32)供应。

    Two-stroke engine having a bypass branching from an air filter housing
    13.
    发明授权
    Two-stroke engine having a bypass branching from an air filter housing 有权
    具有从空气过滤器壳体分支的旁路的二冲程发动机

    公开(公告)号:US06401673B2

    公开(公告)日:2002-06-11

    申请号:US09795392

    申请日:2001-03-01

    IPC分类号: F02B2520

    摘要: The invention relates to a two-stroke engine for a portable handheld work apparatus such as a motor chain saw. The combustion chamber (3), which is configured in a cylinder (2), is delimited by a piston (5) which drives a crankshaft (7) rotatably journalled in a crankcase (4). The crankcase (4) is connected to the combustion chamber (3) via a transfer channel (14). A first end (20) of the transfer channel (14) opens into the combustion chamber (3) via an entry window (12, 15) lying in the cylinder wall (16); whereas, the second end (19) of this transfer channel (14) is open toward the crankcase (4). The transfer channel (14) is connected between its ends (19, 20) to an air channel (22a, 22b) via a check valve (21). The air channel (22a, 22b) supplies essentially fuel-free gas via a throttle (31) having an adjustable throttle element (33). A mixture-preparation device (8) is provided for the air/fuel mixture downstream of an air filter (42) in the flow direction of the combustion air. The air/fuel mixture is supplied via an inlet (11) to the crankcase (4). In order to meter clean air to the air channels in a controlled manner, an adjustable throttle element (33) is mounted in a throttle channel (36) of an independent throttle housing (31) and the throttle channel (36) is connected upstream of the throttle element to the clean space (51) of the air filter (42) connected ahead of the mixture-preparation device (8).

    摘要翻译: 本发明涉及一种用于诸如电动链锯的便携式手持式工作装置的二冲程发动机。 构造在气缸(2)中的燃烧室(3)由驱动曲轴(7)的活塞(5)限定,所述曲轴(7)可旋转地轴颈安装在曲轴箱(4)中。 曲轴箱(4)通过传送通道(14)连接到燃烧室(3)。 传送通道(14)的第一端(20)经由位于气缸壁(16)中的进入窗(12,15)进入燃烧室(3)。 而传送通道(14)的第二端(19)朝向曲轴箱(4)打开。 传送通道(14)通过止回阀(21)连接到其端部(19,20)与空气通道(22a,22b)之间。 空气通道(22a,22b)经由具有可调节节流元件(33)的节气门(31)供给基本上无燃料的气体。 在燃烧空气的流动方向上为空气过滤器(42)下游的空气/燃料混合物提供混合物制备装置(8)。 空气/燃料混合物通过入口(11)供应到曲轴箱(4)。 为了以可控的方式将清洁空气计量到空气通道,可调整节流元件(33)安装在独立节气门壳体(31)的节流通道(36)中,并且节气门通道(36)连接到 节流元件连接到混合物制备装置(8)前面的空气过滤器(42)的清洁空间(51)。