公开(公告)号：US08527186B2

公开(公告)日：2013-09-03

申请号：US12877487

申请日：2010-09-08

申请人： Hoi Ching Wong ,  Madhusudhan Chellappa ,  Carlos Gamez

发明人： Hoi Ching Wong ,  Madhusudhan Chellappa ,  Carlos Gamez

IPC分类号： F02D41/14 ,  G06F19/00

CPC分类号： F02D41/0027 ,  F02D19/027 ,  F02D19/0647 ,  F02D19/0692 ,  F02D19/081 ,  F02D19/105 ,  F02D41/1402 ,  F02D41/1454 ,  F02D41/1458 ,  F02D2041/1432 ,  Y02T10/32 ,  Y02T10/36

摘要： A computer-implemented method is used to correct deviations between a predicted gas excess air ratio and a calculated excess air ratio in a dual fuel engine or other gas fueled compression ignition engine. The method includes determining gas excess air ratio for the engine based at least in part on at least one detected current operating parameter and calculating a predicted exhaust gas oxygen concentration engine based on the predicted gas excess air ratio. A time based filtered predicted exhaust gas oxygen concentration value may then be calculated and compared to a time-based filtered measured exhaust gas oxygen concentration value. The resultant oxygen concentration deviation value may be used to generate a corrected predicted gas excess air ratio.

摘要翻译： 使用计算机实现的方法来校正双燃料发动机或其它气体燃料压缩点火发动机中预测的气体过量空气比和计算的过量空气比之间的偏差。 该方法包括至少部分地基于至少一个检测到的当前操作参数来确定发动机的气体过量空气比，并且基于预测的气体过量空气比计算预测排气氧浓度发动机。 然后可以计算基于时间的过滤的预测废气氧浓度值，并将其与基于时间的过滤的测量废气氧浓度值进行比较。 所得到的氧浓度偏差值可用于产生经校正的预测气体过量空气比。

公开(公告)号：US5258943A

公开(公告)日：1993-11-02

申请号：US814361

申请日：1991-12-23

申请人： Carlos Gamez ,  Roland Pang

发明人： Carlos Gamez ,  Roland Pang

IPC分类号： G06F7/38 ,  G06F7/483 ,  G06F7/533 ,  G06F7/57

CPC分类号： G06F7/483 ,  G06F7/49952 ,  G06F7/49957

摘要： A microprocessor which includes means for rounding a 68 bit binary number. The rounding bit is calculated based on the precision, rounding mode, and the Guard, Round, and Sticky bits. One path assumes that the number will not be rounded up and pads zeros to the fraction bits according to the precision. Another path assumes that the number will be rounded up. Ones instead of zeros are padded, again, according to the precision. Then, the padded number is incremented by one. Based on the rounding bit, either the non-rounded up path or the rounded up path will be chosen. Thereby, a correctly rounded number with the trailing bits following the least significant bit of the selected precision being zeros results.

摘要翻译： 一种微处理器，包括用于舍入68位二进制数的装置。 舍入位根据精度，舍入模式以及Guard，Round和Sticky位计算。 一条路径假设该数字将不会向上舍入，并根据精度将零点填充到分数位。 另一个路径假定该数字将被四舍五入。 根据精度，再次填充一个零而不是零。 然后，填充数字增加1。 基于舍入位，将选择非向上舍入路径或舍入路径。 因此，具有所选精度的最低有效位之后的尾随位的正确舍入的数字为零。

公开(公告)号：US20120055457A1

公开(公告)日：2012-03-08

申请号：US12877487

申请日：2010-09-08

申请人： Hoi Ching Wong ,  Madhusudhan Chellappa ,  Carlos Gamez

发明人： Hoi Ching Wong ,  Madhusudhan Chellappa ,  Carlos Gamez

IPC分类号： F02D41/00 ,  G06F15/00

CPC分类号： F02D41/0027 ,  F02D19/027 ,  F02D19/0647 ,  F02D19/0692 ,  F02D19/081 ,  F02D19/105 ,  F02D41/1402 ,  F02D41/1454 ,  F02D41/1458 ,  F02D2041/1432 ,  Y02T10/32 ,  Y02T10/36

摘要： A computer-implemented method is used to correct deviations between a predicted gas excess air ratio and a calculated excess air ratio in a dual fuel engine or other gas fueled compression ignition engine. The method includes determining gas excess air ratio for the engine based at least in part on at least one detected current operating parameter and calculating a predicted exhaust gas oxygen concentration engine based on the predicted gas excess air ratio. A time based filtered predicted exhaust gas oxygen concentration value may then be calculated and compared to a time-based filtered measured exhaust gas oxygen concentration value. The resultant oxygen concentration deviation value may be used to generate a corrected predicted gas excess air ratio.

摘要翻译： 使用计算机实现的方法来校正双燃料发动机或其它气体燃料压缩点火发动机中预测的气体过量空气比和计算的过量空气比之间的偏差。 该方法包括至少部分地基于至少一个检测到的当前操作参数来确定发动机的气体过量空气比，并且基于预测的气体过量空气比计算预测排气氧浓度发动机。 然后可以计算基于时间的过滤的预测废气氧浓度值，并将其与基于时间的过滤的测量废气氧浓度值进行比较。 所得到的氧浓度偏差值可用于产生经校正的预测气体过量空气比。