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US 10,208,642 B2Granted
Systems and methods for a soot sensor
AssigneeFord Global Technologies, LLC
InventorXiaogang Zhang
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for a soot sensor. In one example, a method diverting exhaust gas from a main exhaust passage to a second exhaust passage comprising a soot sensor with a rotatable component configurable to capture soot.
Claims16
A method comprising:
- diverting exhaust gas from an exhaust pipe to a parallel exhaust pathway outside the exhaust pipe during engine operation, where the exhaust pathway includes rotatable plates coupled to a filtering material in a fixed housing;
- adjusting the engine operation via a controller based on a rotational speed of the plates, the rotational speed correlated to a soot load of the plates;
- and
- regenerating the plates in response to the rotational speed being greater than a threshold rotational speed.
1 more element
A method, comprising:
- diverting a portion of exhaust gas from an exhaust pipe downstream of a particulate filter to a parallel exhaust pathway outside the exhaust pipe during engine operation, where the exhaust pathway includes rotatable plates coupled to a filtering material in a fixed housing;
- performing a regeneration of the plates in response to a rotational speed of the plates being greater than a threshold rotational speed;
- determining a time interval between when the regeneration was performed and when a last regeneration was performed;
- and
- adjusting the engine operation via a controller based on the time interval.
2 more elements
A method, comprising:
- diverting exhaust gas from an exhaust pipe to a parallel exhaust pathway outside the exhaust pipe during engine operation, where the exhaust pathway includes rotatable plates coupled to a filtering material in a fixed housing;
- and
- adjusting the engine operation via a controller based on a rotational speed of the plates measured with a speed sensor, the rotational speed correlated to a soot load of the plates, the adjusting including adjusting one or more of torque output, spark timing, fuel injection timing, air/fuel ratio, and exhaust gas recirculation.
Dependencies are inferred from the claim text.