ADJUSTMENT OF IGNITION TIMING AT CUTOUT
    2.
    发明申请
    ADJUSTMENT OF IGNITION TIMING AT CUTOUT 审中-公开
    在切断时调整点火时间

    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

    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。

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