公开(公告)号：US07228824B2

公开(公告)日：2007-06-12

申请号：US11266608

申请日：2005-11-03

申请人： Chris P. Glugla ,  David K. Trumpy ,  In Kwang Yoo

发明人： Chris P. Glugla ,  David K. Trumpy ,  In Kwang Yoo

IPC分类号： F02B75/04

CPC分类号： F02D41/107 ,  F02B75/04 ,  F02D15/02 ,  F02D2200/1012

摘要： A method for operating an internal combustion engine. The method includes: providing a functional relationship between time rate of change in engine speed, and compression ratio switching engine speed limit; determining time rate of change in engine speed; determining from the determined rate of change of engine speed and the function whether the engine speed exceeds the compression ratio switching engine speed; and commanding the engine to operate at a relatively low compression ratio if the determined time of change in engine speed exceeds the compression ratio switching engine speed limit and commanding the engine to operate at a relatively high compression ratio if the determined time of change in engine speed is less than the compression ratio switching engine speed limit.

公开(公告)号：US06970781B1

公开(公告)日：2005-11-29

申请号：US10858800

申请日：2004-06-03

申请人： Yin Chen ,  Woong-chul Yang ,  William R. Dutcher ,  David K. Trumpy ,  In Kwang Yoo ,  Chris P. Glugla ,  Diana Brehob

发明人： Yin Chen ,  Woong-chul Yang ,  William R. Dutcher ,  David K. Trumpy ,  In Kwang Yoo ,  Chris P. Glugla ,  Diana Brehob

IPC分类号： F02B75/04 ,  F02D13/02 ,  F02D35/02 ,  F02D41/30 ,  G06F17/00 ,  G06F19/00 ,  G06G7/70

CPC分类号： F02D41/3076 ,  F02D13/0207 ,  F02D35/027 ,  Y02T10/18

摘要： A method and system for operating an internal combustion engine. The internal combustion engine is operable in a plurality of compression ratio operating modes. The method includes determining a relationship between a base engine threshold load where the high compression and low compression provide substantially the same engine fuel consumption and engine speed. The determined nominal relationship is modified by a factor, such factor being a function of a condition under which such engine is operating, to obtain a modified relationship. The modified relationship is a function of engine speed and the condition has an effect on knock generation in such engine. The modified relationship and engine speed are used in selecting one of the plurality of compression ratio operating modes for the engine. A hysteresis load as a function of engine speed is determined and applied to the determined hysteresis load to the modified relationship to inhibit switching oscillations between a pair of the plurality of compression ratio operating modes.

摘要翻译： 一种用于操作内燃机的方法和系统。 内燃机可以多个压缩比操作模式操作。 该方法包括确定高压缩和低压缩提供基本相同的发动机燃料消耗和发动机转速之间的基本发动机阈值负荷之间的关系。 所确定的标称关系由因子修改，这种因素是这种发动机运行的条件的函数，以获得修改的关系。 改进的关系是发动机转速的函数，该条件对这种发动机的爆震产生有影响。 改变的关系和发动机转速用于选择发动机的多个压缩比操作模式之一。 确定作为发动机转速的函数的滞后负载并将其应用于所确定的滞后负载至修改关系，以禁止一对多个压缩比操作模式之间的开关振荡。