Controlling operation of exhaust of an engine including a particulate filter
AssigneeFord Global Technologies, LLC
InventorMichiel J. Van Nieuwstadt
Life of this patent
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Abstract
Methods and systems for controlling operation of exhaust of an engine including a particulate filter are described. One example method includes generating compressed air during engine operation, and storing the compressed air. The method further includes, during or after engine shutdown, pushing the compressed air through the particulate filter using a pressure of the compressed air.
Claims18
A method for controlling operation of exhaust of an engine including a particulate filter, comprising:
- generating compressed air during stoichiometric engine operation via a turbocharger and storing the compressed air;
- and
- maintaining the compressed air stored until a threshold temperature is reached after engine shutdown, and then pushing the compressed air through the particulate filter using a pressure of the compressed air.
A method for controlling engine system with a cylinder, an intake manifold, and a particulate filter, comprising:
- compressing air in the intake manifold during engine operation via a turbocharger compressor with an intake throttle opening increased;
- storing the compressed air in the intake manifold by sealing the intake throttle closed;
- and
- during or after an engine shutdown, pushing the compressed air through the particulate filter via a pressure of the compressed air to regenerate the filter.
A method for controlling operation of an engine exhaust including a particulate filter, comprising:
- generating compressed air during boosted engine operation by increasing intake throttle opening;
- storing the compressed air in an intake manifold during engine shutdown by sealing the intake throttle closed;
- maintaining the compressed air stored while shutting down an engine;
- and
- after engine shutdown and upon reaching a threshold filter temperature, pushing the compressed air through the particulate filter.
Dependencies are inferred from the claim text.