EXHAUST THERMAL MANAGEMENT HEATING STRATEGY FOR OPTIMAL NOx REDUCTION AND NH3 STORAGE ON A SELECTIVE CATALYTIC REDUCTION CATALYST
OwnerJames E. MCCARTHY, Jr., Bryan A. ZAVALA +2inventors
InventorsJames E. MCCARTHY, Jr., Bryan A. ZAVALA, Chris SHARP, Andrew MATHEAUS
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Abstract
A method of aftertreatment heat management involves heating a selective catalytic reduction (SCR) device of an aftertreatment system to a temperature of 225° C.+/−15° C. This temperature optimizes for both NOx reduction and NH; storage. A fuel burner or e-Heater can be used to heat the SCR to the desired temperature and, in some cases, increase the temperature to a target temperature of around 250° C. for a period of time to release excess NH3 from the SCR.
Claims19
A method of aftertreatment heat management, comprising:
- heating a selective catalytic reduction (SCR) device of an aftertreatment system to a temperature of 225° C.+/−15° C.
A system, comprising:
- an aftertreatment system comprising a selective catalytic reduction (SCR) device;
- and
- a controller comprising a processor and memory, the memory storing instructions that when executed by the controller, direct the system to:
- heat the SCR device to a temperature of 225° C.+/−15° C.
A computer readable medium comprising instructions stored thereon that cause a controller to perform a method of:
- heating a selective catalytic reduction (SCR) device of an aftertreatment system to a temperature of 225° C.+/−15° C.
Dependencies are inferred from the claim text.