Aftertreatment heat up strategies in vehicles with hybrid powertrains
AssigneeEaton Intelligent Power Limited
InventorsJames E. McCarthy, Jr., Mihai Dorobantu
Life of this patent
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Abstract
A method of heating an aftertreatment system includes fulfilling a vehicle drive load of a vehicle via an electrical drivetrain of a vehicle hybrid powertrain, wherein the vehicle hybrid powertrain comprises the electrical drivetrain and an internal combustion engine; while the electrical drivetrain is fulfilling the vehicle drive load, operating the internal combustion engine to generate airflow for transport of heat through the aftertreatment system; and directing a heat source to raise a temperature through a selective catalytic reduction (SCR) device of the aftertreatment system.
Claims14
A method of heating an aftertreatment system, comprising:
- while a selective catalytic reduction (SCR) device of the aftertreatment system is below a particular temperature, operating to spin an internal combustion engine of a vehicle hybrid powertrain of a vehicle with an electric drivetrain to generate airflow for transport of heat through the aftertreatment system;
- and
- while operating to spin the internal combustion engine to generate airflow any time the SCR device of the aftertreatment system is below the particular temperature:
- directly powering wheels of the vehicle by the electrical drivetrain of the vehicle instead of the internal combustion engine to fulfill a vehicle drive load;
- directing a heat source to raise a temperature through the SCR device of the aftertreatment system;
- and
- directing a second heat source to apply heat to the SCR device, wherein the second heat source is the internal combustion engine performing cylinder deactivation (CDA) while operating to spin the internal combustion engine.
A control system comprising a processor and memory, the memory storing instructions that when executed by the processor, direct the control system to:
- while a selective catalytic reduction (SCR) device of the aftertreatment system is below a particular temperature, operate to spin an internal combustion engine of a vehicle hybrid powertrain of a vehicle with an electric drivetrain to generate airflow for transport of heat through an aftertreatment system;
- direct the electrical drivetrain of a vehicle hybrid powertrain instead of the internal combustion engine of the vehicle hybrid powertrain to fulfill a vehicle drive load of the vehicle while the internal combustion engine is operated to spin to generate the airflow any time the SCR device of the aftertreatment system is below the particular temperature;
- and
- while the electrical drivetrain instead of the internal combustion engine is directly powering wheels of the vehicle to fulfill the vehicle drive load and the internal combustion engine is operated to spin to generate airflow for transport of heat through the aftertreatment system, direct a heat source to raise a temperature through the SCR device of the aftertreatment system and direct a second heat source to apply heat to the SCR device, wherein the second heat source is the internal combustion engine performing cylinder deactivation (CDA) while operating to spin the internal combustion engine.
Dependencies are inferred from the claim text.