公开(公告)号：US07921704B2

公开(公告)日：2011-04-12

申请号：US12241807

申请日：2008-09-30

申请人： Chao Fu Daniels ,  Guoming George Zhu ,  William Charles Mammen, Jr. ,  Mengyang Zhang

发明人： Chao Fu Daniels ,  Guoming George Zhu ,  William Charles Mammen, Jr. ,  Mengyang Zhang

IPC分类号： G01M15/04

CPC分类号： F02D41/0025 ,  F02D19/084 ,  F02D19/088 ,  F02D2200/0611 ,  F02P5/1527 ,  Y02T10/36 ,  Y02T10/46

摘要： Alcohol concentration level of flex fuel is estimated based upon in-cylinder ionization signals. The in-cylinder ionization signals are integrated and the rotational completion point of a chosen percentage of the integration total is identified as the integration location for the operating conditions under observation. The calculated integration location correlates with alcohol concentration level of flex fuel, and the integration calculations provide a basis for a virtual flex fuel sensor that provides calculated estimates of alcohol concentration rather than direct sensing using an expensive physical flex fuel sensor.

摘要翻译： 基于缸内电离信号估计酒精浓度水平的柔性燃料。 集成了气缸内电离信号，并将积分总数的选定百分比的旋转完成点识别为观察的操作条件的积分位置。 计算的积分位置与柔性燃料的酒精浓度水平相关，并且积分计算为虚拟柔性燃料传感器提供了基础，虚拟柔性燃料传感器提供了计算的酒精浓度估计，而不是使用昂贵的物理弹性燃料传感器的直接感测。