公开(公告)号：US20150369107A1

公开(公告)日：2015-12-24

申请号：US14767358

申请日：2014-02-11

Applicant: SCANIA CV AB

Inventor： Mikael LUNDSTRÖM ,  Magnus FRÖBERG

IPC: F01N11/00 ,  F01N3/20 ,  B01D53/94

CPC classification number: F01N11/002 ,  B01D53/9477 ,  B01D53/9495 ,  F01N3/208 ,  F01N2550/03 ,  F01N2560/026 ,  F01N2900/1614 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method for troubleshooting in an SCR system which has a dosing unit (250) for dosing of reducing agent into an engine's exhaust duct (290) upstream of an SCR catalytic converter (270) for reduction of NOx content in an exhaust flow from said engine and a DOC unit (259). The method comprises steps of: determining (s310) NOx content in the exhaust flow downstream of said SCR catalytic converter (270); determining satisfactory operation of said SCR catalytic converter (270); progressively altering the dosage of said reducing agent; determining whether said SCR system can reduce NOx content of the exhaust flow downstream of said SCR catalytic converter to a predetermined extent during altered dosing; using the results of determinations as a basis for deciding whether said DOC unit (259) is faulty or not. Also disclosed is a computer programme product having the programme code (P) for a computer (200; 210) for implementing the method according to the invention. Also disclosed is a device for troubleshooting in an SCR system and to a motor vehicle equipped with the device.

Abstract translation: 一种用于在SCR系统中故障排除的方法，其具有用于将还原剂计量到SCR催化转化器（270）上游的发动机排气管道（290）中的计量单元（250），用于减少来自所述发动机的排气流中的NOx含量 和DOC单元（259）。 该方法包括以下步骤：确定（s310）所述SCR催化转化器（270）下游排气中的NOx含量; 确定所述SCR催化转化器（270）的令人满意的操作; 逐渐改变所述还原剂的用量; 在改变的给药期间，确定所述SCR系统是否可以将所述SCR催化转化器下游的排气流的NOx含量减少到预定的程度; 使用确定结果作为决定所述DOC单元（259）是否有故障的基础。 还公开了具有用于实现根据本发明的方法的计算机（200; 210）的程序代码（P）的计算机程序产品。 还公开了一种用于在SCR系统和配备有该装置的机动车辆中进行故障排除的装置。

公开(公告)号：US20180149059A1

公开(公告)日：2018-05-31

申请号：US15577230

申请日：2016-06-07

Applicant: Scania CV AB

Inventor： Magnus FRÖBERG ,  Fredril ROOS ,  Magnus CARLGREN

IPC: F01N3/20 ,  F01N11/00 ,  F01N9/00 ,  F02D41/02 ,  F02D41/14

CPC classification number: F01N3/2066 ,  B60W50/00 ,  F01N9/005 ,  F01N11/005 ,  F01N2900/1602 ,  F02D41/0235 ,  F02D41/0245 ,  F02D41/029 ,  F02D41/1445 ,  F02D41/1446 ,  F02D41/18 ,  F02D2200/0804 ,  F02D2200/701 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

Abstract: The invention relates to methods, systems, and computer program products for controlling a catalytic converter system in a vehicle. The method comprises predicting the temperature of at least one element of the catalytic converter system based on at least a model of the catalytic converter and on an expected driving of the vehicle. The method further comprises controlling the input flow to the catalytic converter system based on the predicted temperature so as to optimize at least one property of the vehicle.