Gasoline particle filter temperature control
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Emil G. Serban, Michiel J. Van Nieuwstadt
Life of this patent
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Abstract
Methods and systems are provided for controlling particulate filter temperature during non-combustion conditions. In one example, a method for an engine includes responsive to a particulate filter temperature above a threshold temperature and while operating the engine with deceleration fuel shut-off (DFSO), fully closing a throttle valve configured to regulate flow of intake air to the engine, and responsive to intake manifold pressure dropping below a threshold pressure while the throttle valve is fully closed, adjusting a position of the throttle valve based on the particulate filter temperature.
Claims14
A method for an engine, comprising:
- responsive to a particulate filter temperature above a threshold temperature and while operating the engine with deceleration fuel shut-off (DFSO), fully closing a throttle valve configured to regulate flow of intake air to the engine;
- and
- responsive to intake manifold pressure dropping below a threshold pressure while the throttle valve is fully closed, adjusting a position of the throttle valve based on the particulate filter temperature.
A method for an engine, comprising:
- initiating a deceleration fuel shut-off (DFSO) event by deactivating fuel injection to the engine and moving a throttle valve coupled upstream of the engine to a preset, at least partially open position;
- responsive to a particulate filter temperature above a threshold temperature, fully closing the throttle valve;
- and
- maintaining intake manifold pressure above a threshold pressure by adjusting intake and/or exhaust valve timing.
Dependencies are inferred from the claim text.