EMISSION CONTROL SYSTEM WITH INDUCTION HEATING AND METHODS FOR USE THEREWITH

• US 20170226907A1
• Filed: 04/24/2017
• Published: 08/10/2017
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: Advanced Technology Emission Solutions Inc
• Original Assignee: Advanced Technology Emission Solutions Inc
• Inventors: Crawford, Robin, Douglas, John
• Granted Patent: US 10,450,915 B2
• Time in Patent Office: Days
• CPC Class Codes: F01N 11/002 the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
• CPC Class Codes: F01N 2240/05 a magnetic, e.g. electromagnetic, device other than a valve
• CPC Class Codes: F01N 2510/00 Surface coverings
• CPC Class Codes: F01N 2900/08 said parameters being related to the engine
• CPC Class Codes: F01N 2900/104 Battery status
• CPC Class Codes: F01N 3/0892 Electric or magnetic treatment, e.g. dissociation of noxious components electric filters F01N3/01; regeneration of exhaust filters F01N3/023; heating catalytic converters F01N3/2006
• CPC Class Codes: F01N 3/2013 using electric or magnetic heating means
• CPC Class Codes: F01N 3/2026 directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
• CPC Class Codes: F01N 3/2828 Ceramic multi-channel monoliths, e.g. honeycombs
• CPC Class Codes: F01N 9/00 Electrical control of exhaust gas treating apparatus monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00; conjoint electrical control of two or more combustion engine functions F02D43/00
• CPC Class Codes: H05B 6/108 for heating a fluid
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An emission control system includes an emission control device having a plurality of passages to facilitate emission control of an exhaust gas from a vehicle engine. An electromagnetic field generator responds to a control signal by generating an electromagnetic field via a coil to inductively to heat the emission control device, A controller, coupled to the electromagnetic field generator, generates a temperature signal indicating at least one temperature of the emission control device based on a change in impedance in the coil and generates the control signal based on the temperature signal and further based on a reference temperature to control the at least one temperature of the emission control device in accordance with the reference temperature.

Claims

1. An emission control system comprising:

an emission control device having a plurality of passages to facilitate emission control of an exhaust gas from a vehicle engine;

an electromagnetic field generator that responds to a control signal by generating an electromagnetic field via a coil to inductively to heat the emission control device; and

a controller, coupled to the electromagnetic field generator, that generates a temperature signal indicating at least one temperature of the emission control device based on a change in impedance in the coil and that generates the control signal based on the temperature signal and further based on a reference temperature to control the at least one temperature of the emission control device in accordance with the reference temperature.

2. The emission control system of claim 1 wherein the impedance includes an inductance of the coil.

3. The emission control system of claim 2 wherein the controller generates the temperature signal by characterizing an interference in magnetic field due to a heat of the coil.

4. The emission control system of claim 1 wherein the controller generates an at-temperature signal indication signal when the at least one temperature of the emission control device compares favorably to the reference temperature.

5. The emission control system of claim 4 further comprising:

an at-temperature indicator, coupled to the controller, that generates an at-temperature indication to a driver of a vehicle containing the emission control device system in response to the at-temperature signal indication signal indicating that the emission control device has reached a reference temperature.

6. The emission control system of claim 4 wherein start-up of the vehicle engine is enabled in response the at temperature signal indication signal.

7. The emission control system of claim 1 wherein the controller generates the control signal based on a prediction of when a restart of the vehicle engine will occur.

8. The emission control system of claim 1 wherein the controller generates the control signal further based on a signal indicating an ambient temperature of the vehicle containing the emission control device system.

9. The emission control system of claim 1 wherein the controller generates the control signal further based on a signal indicating an automatic start-stop mode of the vehicle engine wherein the vehicle engine can be automatically turned-off and restarted during vehicle operation.

10. The emission control system of claim 1 wherein the electromagnetic field generator operates based on power from a battery and the controller generates the control signal further based on a signal indicating remaining charge in the battery.

11. The emission control system of claim 10 wherein the controller generates the control signal in accordance with a low power mode when the remaining charge in the battery compares unfavorably with a low power threshold.

12. The emission control system of claim 1 wherein the controller includes a driving mode prediction generator that predicts a current one of a plurality of driving modes of the vehicle based on vehicle control data, wherein the plurality of driving modes include a stop-and-go traffic mode and wherein the controller adaptively generates the control signal in accordance with the current one of the plurality of driving modes.

13. The emission control system of claim 1 wherein the controller further controls an electrohydrodynamic heat/mass transfer process of the emission control device system.

14. A method comprising:

generating a temperature signal indicating a temperature of an emission control device based on a change in impedance in a coil;

generating a control signal based on the temperature signal; and

generating an electromagnetic field via the coil to inductively heat the emission control device in response to the control signal.

15. The method of claim 14 wherein the impedance includes an inductance of the coil.

16. The method of claim 15 wherein the temperature signal is generated by characterizing an interference in magnetic field due to a heat of the coil.

17. The method of claim 14 further comprising:

generating an at-temperature signal indication signal when the temperature of emission control device compares favorably to a reference temperature; and

enabling start-up of a vehicle engine in response the at-temperature signal indication signal.

18. The method of claim 14 wherein the controller generates the control signal further based on at least one of:

a signal indicating a rotational velocity of a vehicle engine;

a signal indicating an ambient temperature of a vehicle;

a signal indicating an auto start-stop mode of the vehicle engine;

a signal indicating a remaining charge in a vehicle battery.

19. The method of claim 14 further comprising:

predicting a current one of a plurality of driving modes of a vehicle based on vehicle control data, wherein the plurality of driving modes include a stop-and-go traffic mode;

the control signal is generated in accordance with the current one of the plurality of driving modes.

20. The method of claim 14 further comprising:

controlling an electrohydrodynamic heat/mass transfer process of the emission control device.