Control of aftertreatment regeneration in a hybrid powered vehicle
First Claim
Patent Images
1. A method, comprising:
- determining that an engine aftertreatment regeneration is indicated in response to a regeneration request index exceeding a first threshold during operation of a powertrain that includes an internal combustion engine and a battery, the internal combustion engine producing an exhaust flow to an aftertreatment system;
calculating a battery usage amount of the battery for an engine aftertreatment regeneration operation in response to the determining the engine aftertreatment regeneration is indicated for the aftertreatment system;
determining an acceptable battery usage amount for the battery in response to a current battery state of charge (current SOC) and a minimum battery state of charge (minimum SOC), wherein the acceptable battery usage amount is increased by lowering the minimum SOC as an urgency of the engine aftertreatment regeneration indicated by the regeneration request index increases; and
initiating the engine aftertreatment regeneration operation by increasing a temperature of the exhaust stream through the aftertreatment system in response to the battery usage amount being not greater than the acceptable battery usage amount.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount.
-
Citations
22 Claims
-
1. A method, comprising:
-
determining that an engine aftertreatment regeneration is indicated in response to a regeneration request index exceeding a first threshold during operation of a powertrain that includes an internal combustion engine and a battery, the internal combustion engine producing an exhaust flow to an aftertreatment system; calculating a battery usage amount of the battery for an engine aftertreatment regeneration operation in response to the determining the engine aftertreatment regeneration is indicated for the aftertreatment system; determining an acceptable battery usage amount for the battery in response to a current battery state of charge (current SOC) and a minimum battery state of charge (minimum SOC), wherein the acceptable battery usage amount is increased by lowering the minimum SOC as an urgency of the engine aftertreatment regeneration indicated by the regeneration request index increases; and initiating the engine aftertreatment regeneration operation by increasing a temperature of the exhaust stream through the aftertreatment system in response to the battery usage amount being not greater than the acceptable battery usage amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus, comprising:
-
a controller comprising; a regeneration request module structured to interpret a regeneration request index and to determine that an engine aftertreatment regeneration is indicated in response to the regeneration request index exceeding a first threshold; a battery consumption module structured to calculate a battery usage amount for an engine aftertreatment regeneration operation in response to the indicated engine aftertreatment regeneration; a battery monitoring module structured to determine an acceptable battery usage amount in response to a current battery state of charge (current SOC) and a minimum battery state of charge (minimum SOC), wherein the acceptable battery usage amount is increased by lowering the minimum SOC as an urgency of the engine aftertreatment regeneration indicated by the regeneration request index increases; and a regeneration control module structured to provide an engine aftertreatment regeneration command to initiate the engine aftertreatment regeneration operation in response to the battery usage amount and the acceptable battery usage amount. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A system, comprising:
-
a vehicle having a hybrid powertrain system including a first motive power contributor comprising an internal combustion engine and a second motive power contributor comprising a battery; an engine aftertreatment system receiving an exhaust stream from the engine, the engine aftertreatment system requiring episodic regeneration events; a controller, comprising; a regeneration request module structured to interpret a regeneration request index and to determine that an engine aftertreatment regeneration operation is indicated in response to the regeneration request index exceeding a first threshold; a battery consumption module structured to calculate a battery usage amount for an engine aftertreatment operation in response to the indicated engine aftertreatment regeneration operation; a battery monitoring module structured to determine an acceptable battery usage amount in response to a current battery state of charge (current SOC) and a minimum battery state of charge (minimum SOC)), wherein the acceptable battery usage amount is increased by lowering the minimum SOC as an urgency of the engine aftertreatment regeneration operation indicated by the regeneration request index increases; and a regeneration control module structured to provide an engine aftertreatment regeneration command to initiate the engine aftertreatment regeneration operation in response to the battery usage amount and the acceptable battery usage amount. - View Dependent Claims (19, 20, 21, 22)
-
Specification