公开(公告)号：WO2013187812A1

公开(公告)日：2013-12-19

申请号：PCT/SE2012/050634

申请日：2012-06-13

Applicant: HUSQVARNA AB ,  NYBACKA, Matias ,  SUNDKVIST, Ricky ,  VALFRIDSSON, Stefan

Inventor： NYBACKA, Matias ,  SUNDKVIST, Ricky ,  VALFRIDSSON, Stefan

IPC: A01B33/08 ,  A01D34/00 ,  A01D75/18 ,  E01H1/05 ,  A01D34/42

CPC classification number: A01B33/16 ,  A01B71/08

Abstract: Embodiments herein relate to a rotary attachment of a power driven garden tool, which rotary attachment (100) comprises a core member (110) having a cylindrical configuration and an envelope surface (111). The core member (110) is arranged to be rotatably coupled to a rotary attachment receiving portion of the power driven garden tool, so as to be rotatable about a central longitudinal axis of rotation (112). The rotary attachment also comprises a working tool (120), attached to the core member (110) so as to rotate therewith. The rotary attachment is characterized in that the core member (110) comprises at least one air gap providing element (115) extending between two axially spaced apart positions along the envelope surface (111) of the core member (110).

Abstract translation: 本文的实施例涉及动力驱动园艺工具的旋转附件，该旋转附件（100）包括具有圆柱形构造的芯构件（110）和包络面（111）。 芯构件（110）布置成可旋转地联接到动力驱动花园工具的旋转附接接收部分，以便围绕中心纵向旋转轴线（112）旋转。 旋转附件还包括附接到芯构件（110）以与其一起旋转的加工工具（120）。 旋转附件的特征在于，芯构件（110）包括沿着芯构件（110）的包络面（111）在两个轴向间隔开的位置之间延伸的至少一个气隙提供元件（115）。

公开(公告)号：WO2013077784A1

公开(公告)日：2013-05-30

申请号：PCT/SE2011/051400

申请日：2011-11-22

Applicant: HUSQVARNA AB ,  SUNDKVIST, Ricky ,  NYBACKA, Matias

Inventor： SUNDKVIST, Ricky ,  NYBACKA, Matias

IPC: F01L13/08 ,  F02M35/108

CPC classification number: F01L13/08 ,  F01L1/38 ,  F02B25/14 ,  F02B25/20 ,  F02B2075/025 ,  F02M35/10222

Abstract: A crankcase-scavenged two-stroke engine (1) having a cylinder (9), a reciprocating piston (7) movable back and forth in the cylinder (9), and a conduit (21) ported by the piston (7) for supply of additional air into the interior of the cylinder (9) for the scavenging. The engine has an automatic decompression valve (30) for reducing compression in order to facilitate starting of the engine (1), said decompression valve (30) being connected to a combustion chamber (13) of the engine (1) and being closed by underpressure periodically created in a section of the engine (1) when the engine piston (7) is moving back and forth, said section including the additional air conduit (21), said decompression valve (30) being connected to the additional air conduit (21) by an underpressure conduit (37) having a check valve (38) for preservation of the underpressure so as to keep the decompression valve (30) closed when the engine (1) is running, and a bleed conduit (45) for eliminating the underpressure within a few seconds after the engine (1) has stopped so as to open the decompression valve (30).

Abstract translation: 具有气缸（9），可在气缸（9）中前后移动的往复活塞（7））的气缸清扫二冲程发动机（1）和由活塞（7）移动供给的导管（21） 额外的空气进入气缸（9）的内部用于清扫。 发动机具有用于减少压缩以便于启动发动机（1）的自动减压阀（30），所述减压阀（30）连接到发动机（1）的燃烧室（13）并且由发动机 当发动机活塞（7）来回移动时，在发动机（1）的一部分中周期性地产生的负压，所述部分包括附加空气管道（21），所述减压阀（30）连接到附加空气管道 21），具有用于保持负压的止回阀（38）的负压导管（37），以便在发动机（1）运行时使减压阀（30）保持关闭;以及排出管道（45），用于消除 在发动机（1）停止后几秒钟内的负压以打开减压阀（30）。

公开(公告)号：WO2016048199A1

公开(公告)日：2016-03-31

申请号：PCT/SE2014/051084

申请日：2014-09-22

Applicant: HUSQVARNA AB

Inventor： ASSARGÅRD, Johan ,  SUNDKVIST, Ricky ,  WIXE, Stefan ,  AXELSSON, Martin

IPC: F02P9/00 ,  F02D37/02 ,  F02P5/06

CPC classification number: F02P9/005 ,  F02B25/00 ,  F02B25/16 ,  F02B63/02 ,  F02B2075/025 ,  F02D41/1497 ,  F02D41/22 ,  F02D2400/06 ,  F02M17/04 ,  F02P5/145 ,  F02P5/1502 ,  Y02T10/46

Abstract: An internal combustion engine (1) may include a combustion chamber (41) into which a mixture (40) of fuel and air is supplied, a spark plug (50) disposed proximate to the combustion chamber (41) to ignite the mixture (40) by generating a spark such that ignition of the mixture drives a piston (6) operably coupled to a crank portion (12) of the engine (1), a speed sensor (102) configured to determine engine speed, and an electronic control unit (100) configured to control operation of the spark plug (50). The electronic control unit (100) may be configured to initiate a speed limitation operation in response to engine speed reaching a cut out speed threshold and to control ignition timing within an operating band (320) of ignition angles prior to engine speed reaching the cut out speed threshold. The speed limitation operation may include skipping application of sparks. The electronic control unit (100) is further configured to apply a changed ignition angle (330) relative to the operating band (320) for first at least one spark initiated after the speed limitation operation.

Abstract translation: 内燃机（1）可以包括燃烧室（41），燃料和空气的混合物（40）被供应到燃烧室中，靠近燃烧室设置的火花塞，以点燃混合物（40） ），使得混合物的点火驱动可操作地联接到发动机（1）的曲柄部分（12）的活塞（6），配置成确定发动机转速的速度传感器（102）和电子控制单元 （100），其被配置为控制所述火花塞（50）的操作。 电子控制单元（100）可以被配置为响应于发动机速度达到切断速度阈值而启动速度限制操作，并且在发动机速度达到切断之前控制点火角度的工作频带（320）内的点火正时 速度阈值。 速度限制操作可以包括跳过火花的应用。 电子控制单元（100）还被配置为相对于工作带（320）施加改变的点火角（330），用于在速度限制操作之后首先启动至少一个火花。