公开(公告)号：US07894974B2

公开(公告)日：2011-02-22

申请号：US12165737

申请日：2008-07-01

申请人： Andreas Bähner ,  Andreas Lingen ,  Georg Maier ,  Heinrich Leufen ,  Stanislaw Cichon ,  Leo Kieβling

发明人： Andreas Bähner ,  Andreas Lingen ,  Georg Maier ,  Heinrich Leufen ,  Stanislaw Cichon ,  Leo Kieβling

IPC分类号： F02D45/00

CPC分类号： F02D41/2422 ,  F02B2075/025 ,  F02D2400/04 ,  F02P1/02 ,  F02P5/1506 ,  F02P5/1508 ,  F02P9/002 ,  Y02T10/46

摘要： A two-stroke engine has a cylinder with a combustion chamber delimited by a reciprocating piston, wherein the piston drives in rotation a crankshaft, and wherein a spark plug projects into the combustion chamber and ignites a fuel/air mixture. The two-stroke engine further has devices for supplying fuel and combustion air to the combustion chamber and a control unit that determines the ignition timing based on an ignition map. The ignition map indicates the ignition timing as a function of the engine speed for at least one first and one second operating states and for at least one first and one second engine speed ranges. The engine is controlled in that for an engine cycle the ignition timing is set in the second operating state at least within the first engine speed range based on the engine speed and on the number of engine cycles since the last combustion.

摘要翻译： 二冲程发动机具有气缸，燃烧室由往复运动的活塞限定，其中活塞驱动曲轴旋转，并且其中火花塞突出到燃烧室中并点燃燃料/空气混合物。 二冲程发动机还具有用于向燃烧室供给燃料和燃烧空气的装置以及基于点火图确定点火正时的控制单元。 点火图表示对于至少一个第一和第二操作状态以及至少一个第一和第二发动机转速范围，作为发动机转速的函数的点火正时。 发动机被控制为对于发动机循环，基于发动机转速以及自上次燃烧以来的发动机循环次数，至少在第一发动机转速范围内将点火正时设定在第二运行状态。