Systems and methods for managing the temperature of an aftertreatment system
AssigneeCaterpillar Inc.
InventorsDavid T. Montgomery, Jeff A. Howard
Life of this patent
Estimating the term…
Abstract
An aftertreatment temperature management system includes: an engine operative to combust a fuel; an aftertreatment system including an oxidation catalyst and operative to receive exhaust produced by the engine; a heat exchanger coupled to the aftertreatment system and operative to exchange heat between exhaust downstream of the oxidation catalyst and exhaust upstream of the oxidation catalyst; and an insulation at least partially enclosing the heat exchanger and the oxidation catalyst.
Claims20
An aftertreatment temperature management system comprising:
- an engine operative to combust a fuel;
- an aftertreatment system including an oxidation catalyst and operative to receive exhaust produced by the engine;
- a heat exchanger coupled to the aftertreatment system and operative to exchange heat between exhaust downstream of the oxidation catalyst and exhaust upstream of the oxidation catalyst, the heat exchanger including a shell and a plurality of tubes;
- and
- an insulation at least partially enclosing the heat exchanger and the oxidation catalyst, wherein the insulation entirely surrounds the tubes of the heat exchanger.
An aftertreatment temperature management system comprising:
- an engine operative to combust a fuel;
- an aftertreatment system including an oxidation catalyst and operative to receive exhaust produced by the engine;
- a heat exchanger coupled to the aftertreatment system and operative to exchange heat between exhaust downstream of the oxidation catalyst and exhaust upstream of the oxidation catalyst;
- an additive heat component operative to add heat to the aftertreatment system, the additive heat component including a hydrogen fuel injector or a gaseous fuel admission valve positioned upstream of the oxidation catalyst and positioned external to the heat exchanger;
- a temperature sensor operative to sense a temperature of the aftertreatment system;
- and
- a controller coupled to the additive heat component and operative to:
- monitor the temperature of the aftertreatment system sensed by the temperature sensor;
- and
- activate and deactivate the additive heat component in response to increases and decreases of the temperature of the aftertreatment system.
A method for managing the temperature of an aftertreatment system, the method comprising:
- receiving exhaust from an engine operative to combust a fuel, the exhaust being received by an aftertreatment temperature management system including an aftertreatment system and a heat exchanger operative to increase a temperature of the exhaust, the heat exchanger including a shell surrounding a plurality of tubes;
- determining the temperature of the exhaust;
- comparing the temperature of the exhaust to a threshold aftertreatment system temperature;
- and
- activating an additive heat component operative to add heat to the aftertreatment system in response to the temperature of the exhaust being lower than the threshold aftertreatment system temperature.
Dependencies are inferred from the claim text.