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US 9,790,830 B2Granted
Exhaust after-treatment system including electrolysis generated H2 and NH3
AssigneeTenneco Automotive Operating Company Inc.
InventorYong Sun
Life of this patent
Estimating the term…
Abstract
An exhaust after-treatment system including an exhaust passage, a lean-NOx trap (LNT) provided in the exhaust passage, a tank carrying an aqueous reagent, an electrochemical cell in communication with the tank and configured to receive the aqueous reagent therefrom, the electrochemical cell configured to convert the aqueous reagent into a hydrogen exhaust treatment fluid for purging the LNT, and a controller in communication with the electrochemical cell, wherein the controller is configured to vary an amount of the hydrogen exhaust treatment fluid produced by the electrochemical cell.
Claims29
An exhaust after-treatment system comprising:
- an exhaust passage;
- a lean-NOx trap (LNT) provided in the exhaust passage;
- an exhaust treatment component provided in the exhaust passage;
- a tank carrying an aqueous reagent;
- an electrochemical cell in communication with the tank and configured to receive the aqueous reagent therefrom, the electrochemical cell configured to convert the aqueous reagent into a hydrogen exhaust treatment fluid for purging the LNT and another exhaust treatment fluid for treating an exhaust in the exhaust treatment component;
- and
- a controller in communication with the electrochemical cell, the controller being configured to vary an amount of the hydrogen exhaust treatment fluid produced by the electrochemical cell.
4 more elements
An exhaust after-treatment system comprising:
- an exhaust passage;
- a lean-NOx trap (LNT) provided in the exhaust passage;
- an SCR exhaust treatment component provided in the exhaust passage;
- a tank carrying an aqueous urea reagent;
- a plurality of electrochemical cells in communication with the tank and configured to receive the aqueous urea reagent therefrom, the electrochemical cells each configured to convert the aqueous reagent into ammonia exhaust treatment fluid and a hydrogen exhaust treatment fluid;
- a controller in communication with each of the electrochemical cells, the controller being configured to vary amounts of each of the hydrogen exhaust treatment fluid and the ammonia exhaust treatment fluid produced by the electrochemical cells;
- a first injector in communication with each of the electrochemical cells and the exhaust passage, the first injector being configured to receive the hydrogen exhaust treatment fluid from the electrochemical cells, and dose the hydrogen exhaust treatment fluid into the exhaust passage at a location upstream from the LNT to purge the LNT;
- and
- a second injector in communication with each of the electrochemical cells and the exhaust passage, the second injector being configured to receive the ammonia exhaust treatment fluid from the electrochemical cells, and dose the ammonia exhaust treatment fluid into the exhaust passage at a location upstream from the SCR exhaust treatment component.
6 more elements
An exhaust after-treatment system comprising:
- an exhaust passage;
- a lean-NOx trap (LNT) provided in the exhaust passage;
- an SCR exhaust treatment component provided in the exhaust passage;
- a tank carrying an aqueous urea reagent;
- a plurality of electrochemical cells in communication with the tank and configured to receive the aqueous urea reagent therefrom, the electrochemical cells each configured to convert the aqueous reagent into a hydrogen exhaust treatment fluid and an ammonia exhaust treatment fluid;
- a controller in communication with each of the electrochemical cells, the controller being configured to vary amounts of each of the hydrogen exhaust treatment fluid and the ammonia exhaust treatment fluid produced by the electrochemical cells;
- a first feed line in communication with and configured to receive the hydrogen exhaust treatment fluid from each of the electrochemical cells;
- a second feed line in communication with and configured to receive the ammonia exhaust treatment fluid from each of the electrochemical cells;
- a plurality of first injectors in communication with the first feed line, the first injectors each being configured to dose the hydrogen exhaust treatment fluid into the exhaust passage at a location upstream from the LNT;
- and
- a plurality of second injectors in communication with the second feed line, the second injectors each being configured to dose the ammonia exhaust treatment fluid into the exhaust passage at a location upstream from the SCR exhaust treatment component,
- wherein a plurality of first valves are located between the first injectors and the first feed line, and a plurality of second valves are located between the second injectors and the second feed line.
9 more elements
Dependencies are inferred from the claim text.