公开(公告)号：US09181841B2

公开(公告)日：2015-11-10

申请号：US12862469

申请日：2010-08-24

Applicant: Alexander Leu ,  Torsten Mueller ,  Markus Wesslau

Inventor： Alexander Leu ,  Torsten Mueller ,  Markus Wesslau

IPC: F01N3/00 ,  F01N11/00 ,  F02D41/02 ,  F02D41/06 ,  F02D41/00 ,  F02D41/14 ,  F02D41/40

CPC classification number: F01N11/002 ,  F01N2550/02 ,  F02D41/0005 ,  F02D41/025 ,  F02D41/0255 ,  F02D41/062 ,  F02D41/1446 ,  F02D41/405 ,  F02D2200/0804 ,  Y02T10/26 ,  Y02T10/47

Abstract: A method is provided for monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine. The method includes, but is not limited to measuring the temperature of the exhaust gas upstream and downstream of the diesel oxidation catalyst during a post injection phase or after injection phase of the combustion engine, determining whether a catalyst light-off occurred by using the temperature data of the exhaust gas, calculating the surface temperature of the diesel oxidation catalyst by using the measured temperature data of the exhaust gas, and defining the calculated temperature as light-off temperature of the diesel oxidation catalyst in the case that a catalyst light-off is determined. By means of the method, it is possible to determine the actual light-off temperature of the diesel oxidation catalyst for instance after each engine start by means of calculating the surface temperature of the diesel oxidation catalyst. Since the light-off temperature is not considered as a constant but as a changing variable, the aging of the diesel oxidation catalyst is sufficiently considered. Thus, it is provided a means for monitoring the light-off temperature of a diesel oxidation catalyst considering an aging of the diesel oxidation catalyst.

Abstract translation: 提供了一种监测内燃机柴油机氧化催化剂的点火温度的方法。 该方法包括但不限于在内燃机的后喷射阶段或喷射阶段之后测量柴油机氧化催化剂的上游和下游的废气的温度，确定是否通过使用温度来发生催化剂点火 废气的数据，通过使用测定的废气温度数据计算柴油机氧化催化剂的表面温度，并且在催化剂熄灭的情况下将计算出的温度定义为柴油机氧化催化剂的关闭温度 决心，决意，决定。 通过该方法，可以通过计算柴油机氧化催化剂的表面温度来确定例如在每个发动机启动之后的柴油氧化催化剂的实际点火温度。 由于关闭温度不被认为是常数，而是作为变化的变量，充分考虑了柴油机氧化催化剂的老化。 因此，考虑到柴油机氧化催化剂的老化，提供了用于监测柴油机氧化催化剂的起燃温度的手段。

公开(公告)号：US20110120091A1

公开(公告)日：2011-05-26

申请号：US12862469

申请日：2010-08-24

Applicant: Alexander LEU ,  Torsten MUELLER ,  Markus WESSLAU

Inventor： Alexander LEU ,  Torsten MUELLER ,  Markus WESSLAU

IPC: F01N11/00

CPC classification number: F01N11/002 ,  F01N2550/02 ,  F02D41/0005 ,  F02D41/025 ,  F02D41/0255 ,  F02D41/062 ,  F02D41/1446 ,  F02D41/405 ,  F02D2200/0804 ,  Y02T10/26 ,  Y02T10/47

Abstract: A method is provided for monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine. The method includes, but is not limited to measuring the temperature of the exhaust gas upstream and downstream of the diesel oxidation catalyst during a post injection phase or after injection phase of the combustion engine, determining whether a catalyst light-off occurred by using the temperature data of the exhaust gas, calculating the surface temperature of the diesel oxidation catalyst by using the measured temperature data of the exhaust gas, and defining the calculated temperature as light-off temperature of the diesel oxidation catalyst in the case that a catalyst light-off is determined. By means of the method, it is possible to determine the actual light-off temperature of the diesel oxidation catalyst for instance after each engine start by means of calculating the surface temperature of the diesel oxidation catalyst. Since the light-off temperature is not considered as a constant but as a changing variable, the aging of the diesel oxidation catalyst is sufficiently considered. Thus, it is provided a means for monitoring the light-off temperature of a diesel oxidation catalyst considering an aging of the diesel oxidation catalyst.

Abstract translation: 提供了一种监测内燃机柴油机氧化催化剂的点火温度的方法。 该方法包括但不限于在内燃机的后喷射阶段或喷射阶段之后测量柴油机氧化催化剂的上游和下游的废气的温度，确定是否通过使用温度来发生催化剂点火 废气的数据，通过使用测定的废气温度数据计算柴油机氧化催化剂的表面温度，并且在催化剂熄灭的情况下将所计算的温度定义为柴油机氧化催化剂的关闭温度 决心，决意，决定。 通过该方法，可以通过计算柴油机氧化催化剂的表面温度来确定例如在每个发动机启动之后的柴油氧化催化剂的实际点火温度。 由于关闭温度不被认为是常数，而是作为变化的变量，充分考虑了柴油机氧化催化剂的老化。 因此，考虑到柴油机氧化催化剂的老化，提供了用于监测柴油机氧化催化剂的起燃温度的手段。