Exhaust gas treatment systems and methods
AssigneeFord Global Technologies, LLC
InventorDaniel Sun
Life of this patent
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Abstract
A system, device and a method for gas treatment is provided. The gas treatment system comprises a generator, one or more corona devices and separation device disposed in sequence along an exhaust gas flow direction. The generator is driven by a gas flow to generate an alternating supplying voltage. The corona devices are electrically connected to the generator to provide the supplying voltage and generate a first electric field via corona discharge by the supplying voltage such that particulates in the gas passing the first electric field are charged. The separation device is electrically connected to the generator and generate a second electric filed via the supplying voltage to separate charged particulates from the exhaust gas flow.
Claims20
An exhaust gas treatment system, comprising:
- a housing;
- a generator, wherein the generator is driven by an exhaust gas flow to generate an alternating current to provide a supplying voltage;
- one or more corona devices disposed in the housing, wherein the corona devices are electrically connected to the generator and generate a first electric field by the supplying voltage such that particulates in the exhaust gas passing the first electric field are charged;
- and
- a separation device disposed in the housing, wherein the separation device is electrically connected to the generator and generates a second electric field via the supplying voltage such that charged particulates in the exhaust gas flow are separated from the exhaust gas flow,
- wherein the generator, the corona devices and the separation device are connected in sequence along an exhaust gas flow direction, and
- wherein a portion of the housing containing the corona devices have a cross-section area less than a cross-section area of a portion of the housing containing the separation device, and wherein the cross-section areas of the housing are at cross sections perpendicular to an exhaust gas flow direction.
An exhaust gas treatment system in a vehicle, comprising:
- a housing including an inlet to receive an exhaust gas flow and an outlet to discharge the exhaust gas flow;
- a generator disposed adjacent to the inlet, wherein the generator is driven by the exhaust gas flow to generate an alternating current to provide a supplying voltage;
- a first corona device disposed in the housing, wherein the corona device generates a first electric field by corona discharge via the supplying voltage, and wherein the first electric field causes particulates in the exhaust flow charged;
- and
- a separation device disposed inside the housing and downstream of the first corona device, wherein the separation device generates a second electric field via the supplying voltage and is configured to separate charged particulates from the exhaust gas flow,
- wherein a portion of the housing containing the first corona device has a cross-section area less than a cross-section area of a portion of the housing containing the separation device, and wherein the cross-section areas of the housing are at cross sections perpendicular to an exhaust gas flow direction.
An exhaust gas treatment method in a vehicle, comprising:
- generating an alternate current to provide a supplying voltage by a generator via an exhaust gas flow;
- generating a first electric field via corona discharge by the supplying voltage in a corona device such that particulates in the exhaust gas flow are charged in the first electric field, wherein the corona device is disposed in a housing;
- and
- generating a second electric field the supplying voltage in a separation device disposed in the housing and downstream of the corona device such that charged particulates from the exhaust gas flow are separated from the exhaust gas flow in the second electric field,
- wherein a portion of the housing containing the corona device has a cross-section area less than a cross-section area of a portion of the housing containing the separation device, and wherein the cross-section areas of the housing are at cross sections perpendicular to an exhaust gas flow direction.
Dependencies are inferred from the claim text.