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US 10,947,883 B2Granted
Methods and systems for adjusting exhaust gas flow through an aftertreatment device
AssigneeFord Global Technologies, LLC
InventorsFelix Goebel, Guenter Grosch, Rainer Lach, Richard Fritsche
Life of this patent
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Abstract
Methods and systems are provided for a flow device shaped to adjust flow to radial positions of an emission control device. In one example, a system may include where the flow device comprises a plurality of inner openings that align while a plurality of outer openings are misaligned to flow exhaust gas proximal to a central axis of an exhaust passage, and where the plurality of outer openings are aligned and the plurality of inner openings are misaligned to flow exhaust gas distal to the central axis.
Claims19
A system comprising:
- a flow device shaped to flow exhaust gas to an outer region or an inner region of an emission control device, wherein the flow device comprises a rotatable first plate and a fixed second plate, each of the first plate and the second plate comprising inner and outer openings, wherein an alignment of the inner and outer openings is adjusted via a rotation of the first plate;
- a temperature sensor and a volumetric flow sensor arranged upstream of the emission control device;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
- adjust the flow device in response to a comparison of a temperature sensed by the temperature sensor to a threshold temperature and a comparison of a volumetric exhaust gas flow sensed by the volumetric flow sensor relative to a threshold value.
2 more elements
A engine system comprising:
- an engine fluidly coupled to an exhaust passage;
- a flow device arranged along the exhaust passage comprising a first plate and a second plate, wherein one of the first plate or the second plate is rotatable between first and second positions, the first position aligning inner openings and misaligning outer openings of the first and second plates to flow exhaust gas along a central axis of the exhaust passage, the second position aligning outer openings and misaligning inner openings of the first and second plates to flow exhaust gas away from the central axis of the exhaust passage;
- a catalytic converter device comprising an LNT arranged along an inner region of the catalytic converter device and an oxidation catalyst arranged along an outer region of the catalytic converter device, wherein only the LNT receives exhaust gas when the flow device is in the first position and only the oxidation catalyst receives exhaust gas when the flow device is in the second position;
- a temperature sensor arranged upstream of the catalytic converter configured to sense a temperature of exhaust gas;
- a volumetric sensor arranged upstream of the catalytic converter configured to sense a volumetric flow of exhaust gas;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
- rotate one of the first or second plates to the first position in response to the temperature of exhaust gas being less than a threshold temperature and the volumetric flow of exhaust gas being less than a threshold value;
- and
- rotate one of the first or second plates to the second position in response to one of the temperature of exhaust gas being greater than or equal to the threshold temperature or the volumetric flow of exhaust gas being greater than or equal to the threshold value.
7 more elements
A method comprising:
- via a controller with computer-readable instructions stored on non-transitory memory thereof:
- rotating a first plate relative to a fixed second plate of a flow device arranged upstream of a first catalytic converter device to a first working position in response to a first exhaust gas temperature being less than a first threshold temperature or a volumetric exhaust gas value being less than a threshold value;
- rotating the first plate to a second working position in response to the first exhaust gas temperature being greater than or equal to the first threshold temperature or the volumetric exhaust gas value being greater than or equal to the threshold value;
- and
- injecting reductant via an injector positioned to inject into a portion of an exhaust passage downstream of the first catalytic converter device and upstream of a second catalytic converter device in response to a second exhaust gas temperature being greater than or equal to a second threshold temperature.
2 more elements
Dependencies are inferred from the claim text.