Patent ID: 9090243
Filing Date: 2015-07-28
Classification: B60K,B60W,F02D,Y02T

Abstract:
1. A method of controlling a hybrid electric vehicle to warm-up a catalyst within a catalytic converter of the vehicle, said method comprising: determining, by a controller, a state of charge of a high voltage battery of the hybrid electric vehicle; determining, by the controller, whether the high voltage battery is capable of accepting a first amount of charge in addition to the determined state of charge, the first amount of charge associated with a first procedure to warm-up the catalyst to a light-off temperature, the first procedure including controlling an engine of the hybrid electric vehicle to operate at a first speed and a first torque; performing the first procedure to warm-up the catalyst based on the controller having determined that the high voltage battery is capable of accepting the first amount of charge; and performing a second procedure associated with a second amount of charge to warm-up the catalyst to the light-off temperature based on the controller having determined that the high voltage battery is incapable of accepting the first amount of charge; wherein the second amount of charge is in addition to the determined state of charge but less than a charge limit of the high voltage battery and the first amount of charge, and wherein the second procedure includes operating the engine at a second speed higher than the first speed and at a second torque lower than the first torque.