Diesel exhaust treatment systems and methods
First Claim
Patent Images
1. A method for improving operation of a diesel engine by lowering emissions of unburned hydrocarbons and carbon monoxide, the method comprising the steps of:
- providing for at least one fuel borne catalyst reservoir containing a fuel borne catalyst;
providing for a presence of a diesel fuel and combustion air;
providing for an engine control unit is configured to inject the fuel borne catalyst from the at least one fuel borne catalyst reservoir into the diesel fuel;
providing for combusting of the diesel fuel in the diesel engine to produce exhaust gases; and
,providing for directing of the exhaust gases into an exhaust system;
wherein the fuel borne catalyst comprises;
a platinum group metal composition comprising at least one material selected from the group consisting of platinum, and palladium, and mixtures thereof;
at least one rare earth metal selected from the group consisting of cerium, yttrium, and mixtures thereof; and
at least one transition metal compound comprising at least one carboxylate having a general formula selected from the group consisting of M(OOCR)n, MOx(OOCR)y, (MO)2(OOCR)y, and combinations thereof, wherein M is a transition metal, wherein R is selected from the group consisting of an alkyl, an arylalkyl, aryl, and cycloalkyl, and n, x, and y are integers;
wherein the exhaust system comprises at least one of the group consisting of a diesel oxidation catalyst system and a diesel particulate filter;
wherein the engine control unit in a first state is configured to inject the fuel borne catalyst from the at least one fuel borne catalyst reservoir to the diesel fuel so that a fuel borne catalyst metal content in the diesel fuel is about 2 ppm to about 15 ppm; and
wherein the engine control unit is configured in a second state to inject an additional amount of the fuel borne catalyst from the at least one fuel borne catalyst reservoir into the diesel fuel in response to an event, wherein said event is selected from the group consisting ofan unsatisfactory back-pressure profile of one or more of the diesel oxidation catalyst system or the diesel particulate filter;
a back-pressure of the diesel oxidation catalyst system or the diesel particulate filter being above a first threshold back-pressure;
a temperature of the exhaust gases being below a threshold temperature;
a temperature of the exhaust gases being above a threshold temperature;
a back-pressure of the at least one of the group consisting of the diesel oxidation catalyst system and the diesel particulate filter is above a first threshold back-pressure;
an input value exceeds a threshold input value, wherein the input value is a back pressure of one or more of the diesel oxidation catalyst system or the diesel particulate filter, or a temperature of the exhaust gases; and
an input value is below a threshold input value, wherein the input value is a back pressure of one or more of the diesel oxidation catalyst system or the diesel particulate filter, or a temperature of the exhaust gases.
4 Assignments
0 Petitions
Accused Products
Abstract
Disclosed here are systems and methods including one or more FBCs and one or more suitable aftertreatment devices, including DOCs, DPFs, and suitable combinations thereof. The systems and methods disclosed may include selecting a suitable FBC for use with a fuel with a specified sulfur content. Systems and methods disclosed here may also include using one or more ECUs to control one or more FBC dosing/metering devices to supply FBCs from one or more FBC reservoirs in the presence of a specified event.
177 Citations
17 Claims
-
1. A method for improving operation of a diesel engine by lowering emissions of unburned hydrocarbons and carbon monoxide, the method comprising the steps of:
-
providing for at least one fuel borne catalyst reservoir containing a fuel borne catalyst; providing for a presence of a diesel fuel and combustion air; providing for an engine control unit is configured to inject the fuel borne catalyst from the at least one fuel borne catalyst reservoir into the diesel fuel; providing for combusting of the diesel fuel in the diesel engine to produce exhaust gases; and
,providing for directing of the exhaust gases into an exhaust system; wherein the fuel borne catalyst comprises; a platinum group metal composition comprising at least one material selected from the group consisting of platinum, and palladium, and mixtures thereof; at least one rare earth metal selected from the group consisting of cerium, yttrium, and mixtures thereof; and at least one transition metal compound comprising at least one carboxylate having a general formula selected from the group consisting of M(OOCR)n, MOx(OOCR)y, (MO)2(OOCR)y, and combinations thereof, wherein M is a transition metal, wherein R is selected from the group consisting of an alkyl, an arylalkyl, aryl, and cycloalkyl, and n, x, and y are integers; wherein the exhaust system comprises at least one of the group consisting of a diesel oxidation catalyst system and a diesel particulate filter; wherein the engine control unit in a first state is configured to inject the fuel borne catalyst from the at least one fuel borne catalyst reservoir to the diesel fuel so that a fuel borne catalyst metal content in the diesel fuel is about 2 ppm to about 15 ppm; and wherein the engine control unit is configured in a second state to inject an additional amount of the fuel borne catalyst from the at least one fuel borne catalyst reservoir into the diesel fuel in response to an event, wherein said event is selected from the group consisting of an unsatisfactory back-pressure profile of one or more of the diesel oxidation catalyst system or the diesel particulate filter; a back-pressure of the diesel oxidation catalyst system or the diesel particulate filter being above a first threshold back-pressure; a temperature of the exhaust gases being below a threshold temperature; a temperature of the exhaust gases being above a threshold temperature; a back-pressure of the at least one of the group consisting of the diesel oxidation catalyst system and the diesel particulate filter is above a first threshold back-pressure; an input value exceeds a threshold input value, wherein the input value is a back pressure of one or more of the diesel oxidation catalyst system or the diesel particulate filter, or a temperature of the exhaust gases; and an input value is below a threshold input value, wherein the input value is a back pressure of one or more of the diesel oxidation catalyst system or the diesel particulate filter, or a temperature of the exhaust gases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification