发明名称 |
Method for operating an SCR-catalytic converter |
摘要 |
The invention provides for a method for operating an SCR catalytic converter for the aftertreatment of exhaust gases of an internal combustion engine, wherein a reducing agent tank (1) with reducing agent and a reducing agent metering device (8) are provided. The reducing agent tank (1) has at least one tank heater (3) having PTC characteristics. A variable characterizing the heater current is acquired for detecting cavities (10) in the reducing agent tank (1) when the reducing agent is frozen. The presence of cavities is suggested from a deviation of the acquired value or values for the variable characterizing the heater current from a predeterminable reference value, which represents a reducing agent tank without cavities.
|
申请公布号 |
US8479497(B2) |
申请公布日期 |
2013.07.09 |
申请号 |
US20100729945 |
申请日期 |
2010.03.23 |
申请人 |
LOLAS GEORGIOS;KLENK WOLFGANG;WAGNER ANDREAS;ROBERT BOSCH GMBH |
发明人 |
LOLAS GEORGIOS;KLENK WOLFGANG;WAGNER ANDREAS |
分类号 |
F01N3/00 |
主分类号 |
F01N3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|