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US 12,441,296 B2Granted
Aftertreatment heat up strategies in vehicles with hybrid powertrains
AssigneeEaton Intelligent Power Limited
InventorsJames E. McCarthy, Jr., Mihai Dorobantu
Life of this patent
Estimating the term…
Abstract
A vehicle hybrid powertrain includes an internal combustion engine; an electrical drivetrain; a selective catalytic reduction (SCR) device coupled to receive exhaust from the internal combustion engine; a fuel burner; and a control system that controls heat applied to the SCR device including by controlling the fuel burner and the internal combustion engine.
Claims19
A vehicle hybrid powertrain, comprising:
- an internal combustion engine;
- an electrical drivetrain;
- a selective catalytic reduction (SCR) device, coupled to receive exhaust from the internal combustion engine;
- a fuel burner;
- and
- a control system that controls heat applied to the SCR device, including by controlling the fuel burner and the internal combustion engine, wherein the control system comprises:
- a processor;
- and
- a memory storing instructions that when executed by the processor, direct the control system to:
- apply heat using a first temperature setpoint in an aftertreatment system, wherein the aftertreatment system comprises the SCR device;
- while the heat is applied at the first temperature setpoint, receive temperature data from a temperature sensor proximate to the SCR device in the aftertreatment system;
- determine from the temperature data that a first temperature is at a first threshold temperature which is less than the first temperature setpoint;
- and
- after determining that the first temperature is at the first threshold temperature, apply heat using a second temperature setpoint which is less than the first temperature setpoint.
11 more elements
A vehicle hybrid powertrain, comprising:
- an internal combustion engine;
- an electrical drivetrain;
- a selective catalytic reduction (SCR) device, coupled to receive exhaust from the internal combustion engine;
- a fuel burner;
- and
- a control system that controls heat applied to the SCR device, including by controlling the fuel burner and the internal combustion engine, wherein the control system comprises:
- a processor;
- and
- a memory storing instructions that when executed by the processor, direct the control system to:
- apply heat to the SCR device using the fuel burner;
- apply heat to the SCR device using the internal combustion engine in a thermal management mode;
- and
- operate the internal combustion engine in idle to generate airflow from the internal combustion engine that transports the applied heat through the SCR device.
10 more elements
A vehicle hybrid powertrain, comprising:
- an internal combustion engine;
- an electrical drivetrain;
- a selective catalytic reduction (SCR) device, coupled to receive exhaust from the internal combustion engine;
- a fuel burner;
- and
- a control system that controls heat applied to the SCR device, including by controlling the fuel burner and the internal combustion engine, wherein the control system comprises;
- a processor;
- and
- a memory storing instructions that when executed by the processor, direct the control system to:
- open at least one of one or more intake valves and one or more exhaust valves of an internal combustion engine coupled to an aftertreatment system;
- and
- pulse, by an internal combustion engine starter of the internal combustion engine, the internal combustion engine to generate airflow from the internal combustion engine that moves the applied heat downstream the aftertreatment system.
9 more elements
Dependencies are inferred from the claim text.