System to improve after-treatment regeneration
AssigneeHoneywell International Inc.
InventorSteven Don Arnold
Life of this patent
Estimating the term…
Abstract
Exemplary methods, devices, and/or systems are suitable for regenerating a plurality of after-treatment units. An exemplary method includes selecting less than all of a plurality of after-treatment units and adjusting air to fuel ratio for less than all of a plurality of combustion chambers of an engine to thereby cause the selected after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor regeneration of the selected after-treatment units. Other exemplary methods, devices and/or systems are also disclosed.
Claims24
An engine system comprising:
- a plurality of combustion chambers;
- a plurality of after-treatment units;
- a controller to selectively control air to fuel ratio to less than all of the combustion chambers to thereby selectively cause less than all of the after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor after-treatment unit regeneration.
A controller for use with an engine system having a plurality of combustion chambers and a plurality of after-treatment units comprising:
- control logic for selectively controlling air to fuel ratio to less than all of the combustion chambers to thereby selectively cause less than all of the after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor after-treatment unit regeneration.
A method of operating an engine system comprising:
- selecting less than all of a plurality of after-treatment units;
- and
- adjusting air to fuel ratio for less than all of a plurality of combustion chambers to thereby cause the selected after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor regeneration of the selected after-treatment units.
One or more computer-readable media having instructions thereon that are executable by a computer to perform actions comprising:
- adjusting air to fuel ratio for less than all of a plurality of combustion chambers to thereby cause less than all of a plurality of after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor regeneration of the less than all after-treatment units.
A controller comprising:
- means for adjusting air to fuel ratio for less than all of a plurality of combustion chambers to thereby cause less than all of a plurality of after-treatment units to receive exhaust having hydrocarbon and oxygen concentrations that favor regeneration of the less than all after-treatment units.
Dependencies are inferred from the claim text.