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US 7,861,517 B2Granted
Method and system for controlling catalyst temperature
AssigneeDelphi Technologies, Inc.
InventorsDavid Goulette, Joseph V. Bonadies
Life of this patent
Estimating the term…
Abstract
A method for controlling temperature of a catalyst. The method includes monitoring temperature of the catalyst and determining that the catalyst is outside of a catalyst operating temperature window. If the catalyst temperature is high enough for exothermic reaction to occur, reformate is injected into the catalyst. If the catalyst not high enough for exothermic reaction to occur, reformate is injected upstream of the catalyst and ignited.
Claims8
A system for controlling temperature of a catalyst, comprising:
- an exhaust after-treatment device containing the catalyst, wherein the catalyst has a catalyst temperature;
- a temperature sensor configured for monitoring the catalyst temperature and generating a temperature signal;
- a controller configured for receiving the temperature signal;
- a reformer in fluid communication with the after-treatment device and in communication with the controller;
- an igniter upstream of and adjacent to the after-treatment device;
- an engine upstream of the igniter;
- if the catalyst temperature is high enough for exothermic reaction to occur, the controller configured for commanding the reformer to inject reformate to the catalyst;
- and
- if the catalyst temperature is not high enough for exothermic reaction to occur, the controller configured for commanding the reformer to inject reformate upstream of the catalyst and commanding the igniter to ignite the reformate.
6 more elements
A system for controlling temperature of a catalyst, comprising:
- an exhaust after-treatment device containing the catalyst;
- a temperature sensor configured for monitoring temperature of the catalyst and generating a temperature signal indicative of the catalyst temperature;
- a controller configured for receiving the temperature signal;
- a reformer in fluid communication with the after-treatment device and in communication with the controller;
- an igniter upstream of the after-treatment device;
- an engine upstream of the igniter;
- the controller configured for determining that the catalyst temperature is outside of a catalyst operating temperature window;
- if the catalyst temperature is high enough for exothermic reaction to occur, the controller configured for commanding the reformer to inject reformate to the catalyst;
- and
- if the catalyst temperature is not high enough for exothermic reaction to occur, the controller configured for commanding the reformer to inject reformate upstream of the catalyst and commanding the igniter to ignite the reformate.
7 more elements
Dependencies are inferred from the claim text.