Invention Grant
US07640729B2 Method for operating a particulate filter situated in the exhaust gas area of an internal combustion engine and device for carrying out the method 失效
用于操作位于内燃机的排气区域中的微粒过滤器和用于执行该方法的装置的方法

Method for operating a particulate filter situated in the exhaust gas area of an internal combustion engine and device for carrying out the method
Abstract:
A method for operating a particulate filter situated in an exhaust gas area of an internal combustion engine and a device for carrying out the method are described. A measure of the particulate matter burn-off rate is detected for influencing and/or monitoring the particulate matter burn-off rate or for influencing and/or monitoring the particulate filter temperature. A secondary air flow supplied by a secondary air pump is blown into the exhaust gas area upstream from the particulate filter. The secondary air flow is determined as a function of the detected measure of the particulate matter burn-off rate. If necessary, the secondary air flow may be enriched by an oxygen flow or nitrogen flow supplied by an air separation unit. The method prevents the particulate filter from being damaged by an unacceptably high particulate matter burn-off rate or an unacceptably high particulate filter temperature.
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