US 12,421,882 B2 · Method for introducing heat into at least one component of an exhaust-gas aftertreatment device, software and open-loop or closed-loop control device

Abstract

A method for introducing heat into at least one component of an exhaust-gas aftertreatment device of an internal combustion engine (15). The method involves at least partially reacting a partial flow of an exhaust-gas flow with fuel in a heated catalyst (2) and then feeding back the resulting product to the exhaust-gas flow, The amount of fuel fed to the heated catalyst and/or the partial flow fed to the heated catalyst is controlled, by open-loop or closed-loop control, in accordance with the exhaust-gas temperature upstream and/or downstream of the component. The amount of fuel fed to the heated catalyst and/or the partial flow fed to the heated catalyst is determined by means of at least one heated-catalyst characteristic map. A computer readable medium stores a signal sequence representing data suitable for transmission by means of a computer network, to an open-loop or closed-loop control device to carry out the above-described method.

Claims20

Dependent claims

A method for introducing heat into an exhaust-gas aftertreatment device (1) connected to an internal combustion engine (15) which outputs an exhaust-gas flow, the exhaust-gas aftertreatment device (1) comprising one or more of an oxidation catalyst component (11), a particulate filter component (12), and an SCR system component (13), the method comprising:

at least partially reacting a partial flow of the exhaust-gas flow with fuel in a heated catalyst (2) and feeding the reacted partial flow back into the exhaust-gas flow;
controlling the amount of fuel fed to the heated catalyst (2) and/or the partial flow of exhaust-gas flow fed to the heated catalyst (2) based on an exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) in accordance with at least one heated-catalyst characteristic map (35);
and
selecting input variables (351) of the heated-catalyst characteristic map (35) from one or more of:
(i) a driving profile;
(ii) a navigation destination;
(iii) position data;
or
(iv) state of charge of at least one battery,
wherein:
the exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) is indirectly determined from an operating state of the internal combustion engine (15), without direct measurement by temperature sensors.

8 more elements

at least partially reacting a partial flow of the exhaust-gas flow with fuel in a heated catalyst (2) and feeding the reacted partial flow back into the exhaust-gas flow;
controlling the amount of fuel fed to the heated catalyst (2) and/or the partial flow of exhaust-gas flow fed to the heated catalyst (2) based on an exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) in accordance with at least one heated-catalyst characteristic map (35);
and
selecting input variables (351) of the heated-catalyst characteristic map (35) from two or more of:
(i) oxygen content of raw exhaust gas of the internal combustion engine;
either remove this one or change to two or more;
(ii) a driving profile;
(iii) a navigation destination;
(iv) position data;
or
(v) state of charge of at least one battery,
wherein:
the exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) is indirectly determined from an operating state of the internal combustion engine (15), without direct measurement by temperature sensors.

10 more elements

Dependencies are inferred from the claim text.

Method for introducing heat into at least one component of an exhaust-gas aftertreatment device, software and open-loop or closed-loop control device

Life of this patent

Method for introducing heat into at least one component of an exhaust-gas aftertreatment device, software and open-loop or closed-loop control device

Life of this patent

Abstract

Claims20