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US 2019/0292959 A1Published application
Systems and methods for particulate filter regeneration
AssigneeFord Global Technologies, LLC
InventorAed M. Dudar
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for regenerating an exhaust particulate filter during an engine non-combusting condition. In one example, a method may include, responsive to a higher than first threshold soot load on the PF and a higher than threshold PF temperature, regenerating the PF by flowing compressed air through the PF via operation of an electric booster coupled to the intake manifold.
Claims20
A method, comprising:
- during a non-combusting condition of an engine coupled to a vehicle,
- responsive to a higher than first threshold soot load on a particulate filter (PF) coupled to an exhaust passage of the engine and a PF temperature greater than a threshold temperature needed for soot oxidation in presence of oxygen,
- activating an electric booster in an intake system of the engine to route compressed air to the PF for PF regeneration.
A method, comprising:
- during an engine-off condition, and
- responsive to a soot load on a particulate filter (PF) coupled to an exhaust passage of an engine being higher than a first threshold load,
- selectively regenerating the PF by routing compressed air from an intake passage of the engine to the PF, the compressed air supplied by operating an electric booster coupled to the intake passage and opening a throttle coupled to the intake passage.
A system, comprising:
- a controller with computer readable instructions stored on non-transitory memory to control the following when an engine coupled to a vehicle is not combusting fuel and air:
- estimate a particulate matter (PM) load on a particulate filter (PF) housed in an exhaust passage of the engine via a differential pressure sensor coupled across the PF;
- estimate an exhaust temperature via a temperature sensor coupled to the exhaust passage upstream of the PF;
- in response to each of the PM load being higher than a threshold load and the exhaust temperature being higher than a threshold temperature, opening each of an intake throttle, an exhaust gas recirculation (EGR) valve housed in an EGR passage coupling an exhaust manifold to an intake manifold, and a wastegate valve housed in a wastegate passage coupled to the exhaust passage from upstream of an exhaust turbine to downstream of the exhaust turbine, and operating a motor-driven electric compressor housed in a conduit coupled to an intake passage for a duration to route compressed air to the PF for regeneration.
1 more element
Dependencies are inferred from the claim text.