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US 11,428,131 B2Granted
Exhaust-gas aftertreatment arrangement
AssigneeFord Global Technologies, LLC
InventorsJoerg Kemmerling, Frank Wunderlich, Michael Forsting, Vanco Smiljanovski, Hanno Friederichs, Helmut Matthias Kindl, Andreas Kuske, Arnd Sommerhoff
Life of this patent
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Abstract
Methods and systems are provided for a resonator of an exhaust system. In one example, the resonator is a quarter wave resonator with a diaphragm configured to provide pulsations during low-end engine torque conditions.
Claims18
A system, comprising:
- an exhaust system comprising a turbine downstream of one or more aftertreatment devices relative to a direction of exhaust gas flow;
- and
- a resonator system coupled to the exhaust system upstream of the one or more aftertreatment devices at a first junction and downstream of the one or more aftertreatment devices at a second junction;
- wherein the resonator system includes a resonator valve arranged between a diaphragm and the first junction and a spiral tube extending from the diaphragm to the second junction.
1 more element
An exhaust system, comprising:
- a first aftertreatment device arranged upstream of a second aftertreatment device in an exhaust passage relative to a direction of exhaust gas flow;
- a turbine arranged downstream of the second aftertreatment device;
- a resonator system coupled to the exhaust system at a first junction upstream of the first aftertreatment device and a second junction downstream of the second aftertreatment device and upstream of the turbine, further comprising a diaphragm arranged between the first junction and a spiral tube, wherein the spiral tube extends from the diaphragm to the second junction.
An exhaust system, comprising:
- a first aftertreatment device arranged upstream of a second aftertreatment device in an exhaust passage relative to a direction of exhaust gas flow;
- a turbine arranged downstream of the second aftertreatment device;
- a resonator system coupled to the exhaust system at a first junction upstream of the first aftertreatment device and a second junction downstream of the second aftertreatment device and upstream of the turbine, further comprising a diaphragm arranged between the first junction and a spiral tube, wherein the spiral tube extends from the diaphragm to the second junction, further comprising a resonator valve arranged between the diaphragm and the first junction;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
- adjust the resonator valve to an open position in response to an engine speed of an engine being within a threshold range;
- and
- adjust the resonator valve to a closed position in response to the engine speed being outside of the threshold range.
5 more elements
Dependencies are inferred from the claim text.