Hybrid engine aftertreatment thermal management strategy
First Claim
1. An apparatus, comprising:
- a plurality of modules implemented by at least one of hardware and instructions encoded on a computer readable medium, wherein the plurality of modules include;
an operating condition monitoring module structured to interpret a temperature value at a position upstream of a catalyst positioned in an aftertreatment system for an engine;
an operating condition management module structured to interpret a threshold temperature value; and
an engine management module structured to provide an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value, wherein the engine operation command prevents a nominal control stop of the engine to continue to operate the engine to heat an exhaust stream produced by the engine to pass the heated exhaust stream through the catalyst to increase a current temperature of the catalyst, wherein the operating condition monitoring module is further structured to interpret the temperature value in response to a plurality of temperature input values upstream of the catalyst.
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Accused Products
Abstract
A system includes an internal combustion engine producing exhaust gases as a byproduct of operation and an aftertreatment system that treats the exhaust gases. The system further includes a controller that is structured to functionally execute operations to enhance the temperature of the aftertreatment system. The controller includes an operating condition monitoring module that interprets a temperature value at a position upstream of a catalyst positioned in the aftertreatment system. The controller further includes an operating condition management module that interprets a threshold temperature value, and an engine management module that provides an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value.
29 Citations
13 Claims
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1. An apparatus, comprising:
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a plurality of modules implemented by at least one of hardware and instructions encoded on a computer readable medium, wherein the plurality of modules include; an operating condition monitoring module structured to interpret a temperature value at a position upstream of a catalyst positioned in an aftertreatment system for an engine; an operating condition management module structured to interpret a threshold temperature value; and an engine management module structured to provide an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value, wherein the engine operation command prevents a nominal control stop of the engine to continue to operate the engine to heat an exhaust stream produced by the engine to pass the heated exhaust stream through the catalyst to increase a current temperature of the catalyst, wherein the operating condition monitoring module is further structured to interpret the temperature value in response to a plurality of temperature input values upstream of the catalyst. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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determining an energy level of an energy source operationally coupled to an aftertreatment system for an engine; determining whether the energy level is sufficient to transfer thermal energy to a catalyst disposed in the aftertreatment system; transferring thermal energy to the catalyst by continuing to flow engine exhaust in response to determining the energy level is sufficient, wherein continuing to flow engine exhaust includes preventing a nominal control stop of the engine to continue to operate the engine to heat the engine exhaust and pass the heated engine exhaust through the catalyst and increase a current temperature of the catalyst; and performing at least one of a cutting of fuel to at least one cylinder and a post-injection event in the engine to transfer thermal energy to the catalyst. - View Dependent Claims (10, 11)
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12. An apparatus, comprising:
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a plurality of modules implemented by at least one of hardware and instructions encoded on a computer readable medium, wherein the plurality of modules include; an energy detection module structured to determine an energy level of an energy source operationally coupled to an aftertreatment system for an engine; an energy management module structured to determine whether the energy level is sufficient to transfer thermal energy to a catalyst disposed in the aftertreatment system; and an energy distribution module structured to transfer thermal energy to a catalyst by continuing to flow engine exhaust in response to determining the energy level is sufficient, wherein the energy distribution module is further structured to prevent a nominal control stop of the engine to continue to flow and heat the engine exhaust and pass the heated engine exhaust through the catalyst and increase a current temperature of the catalyst, wherein the energy source comprises an energy source selected from the energy sources consisting of;
a high-voltage battery, a DC-DC converter, a DC bus, an AC bus, a low-voltage battery, an inverter, and an electric machine; and
wherein the energy management module is further structured to determine whether the energy level is sufficient by determining whether the energy level of the energy source is sufficient to charge a heater. - View Dependent Claims (13)
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Specification