Exhaust particulate filter regeneration
AssigneeDENSO International America, Inc.
InventorsZhe Huang, Nicholas Polcyn
Life of this patent
Estimating the term…
Abstract
A system for regenerating an emissions particulate filter that filters particulates from exhaust generated by an engine of a vehicle. The system includes an electric heater and a generator. The electric heater heats the emissions particulate filter to burn off exhaust particulates that have accumulated on the emissions particulate filter. The generator converts kinetic energy of the vehicle into electricity during regenerative braking of the vehicle. Electricity generated by the generator powers the electric heater. Energy used to power the electric heater can also come from engine load shifting.
Claims20
A system for regenerating an emissions particulate filter that filters particulates from exhaust generated by an engine of a vehicle, the system comprising:
- an electric heater that heats the emissions particulate filter to burn off exhaust particulates that have accumulated on the emissions particulate filter;
- a generator that converts kinetic energy of the vehicle into electricity during regenerative braking of the vehicle;
- and
- a control module configured to determine that the vehicle has been commanded to decelerate, determine an available usage of brake regeneration energy by sinking to the electric heater or a battery, and determine that the emissions particulate filter requires regeneration;
- wherein electricity generated by the generator powers the electric heater.
An emissions control system for a hybrid vehicle, the system comprising:
- an emissions particulate filter that filters particulates from exhaust generated by an engine of the hybrid vehicle;
- an electric heater that heats the emissions particulate filter to burn off exhaust particulates that have accumulated on the emissions particulate filter;
- a motor-generator operable in a generator mode and a drive mode, in the generator mode the motor-generator converts kinetic energy of the vehicle into electricity during regenerative braking of the vehicle, in the drive mode the motor-generator supplies power for at least partially propelling the vehicle;
- and
- a control module configured to determine that the hybrid vehicle has been commanded to decelerate, determine an available usage of brake regeneration energy by sinking to the electric heater or a battery, and determine that the emissions particulate filter requires regeneration;
- wherein electricity generated by the motor-generator powers the electric heater.
A method for regenerating an emissions particulate filter that filters particulates from exhaust generated by an engine of a vehicle, the method comprising:
- determining that the vehicle has been commanded to decelerate;
- determining an available usage of brake regeneration energy by sinking to an electric heater or a battery;
- determining that the emissions particulate filter requires regeneration;
- converting kinetic energy of the vehicle into electricity with a motor-generator configured in a generator mode during regenerative braking;
- when the particulate filter is in need of regeneration, powering the electric heater with the electricity generated by the motor-generator to burn off exhaust particulates that have accumulated on the emissions particulate filter;
- and
- when the particulate filter is not in need of regeneration, storing the electricity generated by the motor-generator in the battery.
Dependencies are inferred from the claim text.