Electrically heated catalyst control system and method
AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Halim G. Santoso, Brian Spohn, Bryan Nathaniel Roos
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Abstract
An exhaust treatment system comprises M electrically heated substrates and a heater control module. The M electrically heated substrates are coated with a catalyst material and arranged in series to receive exhaust gas of an engine. M is an integer greater than one. The heater control module applies power to N of the M substrates to heat the N substrates during a predetermined period. N is an integer less than M. The engine is turned off and the M electrically heated substrates do not receive exhaust gas during the predetermined period.
Claims20
An exhaust treatment system comprising:
- M electrically heated substrates that are coated with a catalyst material and that are arranged in series to receive exhaust gas of an engine, wherein M is an integer greater than one;
- and
- a heater control module that applies power to N of the M substrates to heat the N substrates during a predetermined period, wherein N is an integer less than M,
- wherein the engine is turned off and the M electrically heated substrates do not receive exhaust gas during the predetermined period.
A method comprising:
- providing M electrically heated substrates that are coated with a catalyst material and that are arranged in series to receive exhaust gas of an engine, wherein M is an integer greater than one;
- and
- applying power to N of the M substrates to heat the N substrates during a predetermined period, wherein N is an integer less than M,
- wherein the engine is turned off and the M electrically heated substrates do not receive exhaust gas during the predetermined period.
Dependencies are inferred from the claim text.