Patent ID: 9574482
Date: 2017-02-21
CPC Classifications: F01N,F02B,Y02T

Claim:
1. A method for passive regeneration of a particle filter arranged in an exhaust tract of an internal combustion engine charged with exhaust gas pressure, the method which comprises: removing a partial exhaust gas stream from a main exhaust gas stream upstream of at least one exhaust turbine; feeding back the partial exhaust gas stream into the main exhaust gas stream at a feed junction downstream of the at least one exhaust turbine, between an NO oxidation catalytic converter and a particle filter disposed in the exhaust tract; providing the particle filter downstream of the feed junction; subjecting the quantity of exhaust gas diverted as a partial exhaust gas stream to open-loop or closed-loop control with the aid of at least one variable throttling and/or shutoff device and actuating said at least one throttling and/or shutoff device arranged in the partial exhaust gas stream as a waste gate by means of an engine controller; subjecting the quantity of exhaust gas diverted as a partial exhaust gas stream to open-loop or closed-loop control in dependence upon a first setpoint temperature partial exhaust gas stream and a second setpoint temperature in the particle filter for holding the particle filter at an exhaust gas temperature level without a decrease in the proportions of NO removing deposited fine particles in the particle filter by passive regeneration according to the following equations: