Engine-on time predictor for aftertreatment scheduling for a vehicle
First Claim
1. A method to control a hybrid electric vehicle comprising:
- in response to a compression ignition engine operating based on an engine-on request, performing an exhaust aftertreatment procedure if an overlap percentage is greater than a threshold value, the overlap percentage calculated as a ratio between a predicted engine-on time and a completion time for the procedure, the predicted engine-on time determined using at least one driving pattern during a completion time for the procedure.
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Accused Products
Abstract
A method to control a hybrid electric vehicle (HEV) having a compression ignition engine includes operating the engine based on an engine-on request and performing an exhaust aftertreatment procedure based on a completion time for the aftertreatment procedure compared to a predicted engine-on time determined using a driving pattern. An HEV is provided with a compression ignition engine with an aftertreatment system, and a controller. The controller is configured to: (i) operate the engine based on an engine-on request, and (ii) perform an exhaust aftertreatment procedure for the vehicle based on a completion time for the aftertreatment procedure compared to a predicted engine-on time determined using a driving pattern. A computer readable medium having stored data representing instructions executable by a controller to control a vehicle is provided with instructions for operating the engine based on an engine-on request, and instructions for performing an exhaust aftertreatment procedure.
38 Citations
20 Claims
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1. A method to control a hybrid electric vehicle comprising:
in response to a compression ignition engine operating based on an engine-on request, performing an exhaust aftertreatment procedure if an overlap percentage is greater than a threshold value, the overlap percentage calculated as a ratio between a predicted engine-on time and a completion time for the procedure, the predicted engine-on time determined using at least one driving pattern during a completion time for the procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 17, 18)
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13. A vehicle comprising:
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a compression ignition engine having an exhaust aftertreatment system; an electric machine coupled to a traction battery; and a controller electronically coupled to the engine wherein the controller is configured to;
(i) operate the engine based on an engine-on request, and (ii) perform an exhaust aftertreatment procedure for the vehicle based on a completion time for the aftertreatment procedure compared to a predicted engine-on time determined using a driving pattern;wherein the engine is coupled to the electric machine using an upstream clutch, and the electric machine is coupled to a transmission using a downstream clutch; and wherein the engine, the electric machine, and the transmission are arranged sequentially. - View Dependent Claims (14, 15)
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19. A hybrid vehicle comprising:
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a compression ignition engine having an exhaust aftertreatment system; and a controller configured to calculate a ratio between a predicted engine-on time (EOT) and a completion time for an exhaust aftertreatment procedure when the engine is operating, and command the procedure if the ratio is greater than a threshold value, the EOT calculated using an engine-on time percentage and an estimated segment time for each driving pattern predicted during the completion time. - View Dependent Claims (20)
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Specification