CPC F01N 9/002 (2013.01) [B01D 46/0086 (2013.01); B01D 46/444 (2013.01); B01D 46/448 (2013.01); B01D 53/944 (2013.01); B01D 53/9431 (2013.01); F01N 3/023 (2013.01); F01N 3/106 (2013.01); F01N 3/2066 (2013.01); B01D 2279/30 (2013.01); F01N 3/0231 (2013.01); F01N 3/0233 (2013.01); F01N 3/2093 (2013.01); F01N 9/005 (2013.01); F01N 11/002 (2013.01); F01N 11/005 (2013.01); F01N 2550/04 (2013.01); F01N 2550/12 (2013.01); F01N 2560/07 (2013.01); F01N 2560/08 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/16 (2013.01); F01N 2900/1808 (2013.01); F01N 2900/1811 (2013.01)] | 19 Claims |
1. A method of detecting a need for regeneration of an exhaust particulate filter, comprising the steps of:
(a) detecting a first pressure drop in a flow section of an exhaust system comprising the exhaust particulate filter, the flow section being connected to the exhaust particulate filter in a fluidically unbranched manner;
(b) sensing an exhaust gas temperature;
(c) calculating an exhaust gas mass flow flowing through the exhaust particulate filter on the basis of the first pressure drop and the exhaust gas temperature;
(d) determining a second pressure drop across the exhaust particulate filter; and
(e) identifying the need for regeneration when the second pressure drop exceeds a predefined pressure limit value dependent on the exhaust gas mass flow.
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