Patents by Inventor Gary Wayne Rice
Gary Wayne Rice has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7150145Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: GrantFiled: December 17, 2003Date of Patent: December 19, 2006Assignee: Engelhard CorporationInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathus Van Genderen
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Publication number: 20040128982Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time, constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: ApplicationFiled: December 17, 2003Publication date: July 8, 2004Applicant: Engelhard CorporationInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathus Van Genderen
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Patent number: 6662553Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: GrantFiled: April 26, 2002Date of Patent: December 16, 2003Assignee: Engelhard CorporationInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen
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Patent number: 6581374Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: GrantFiled: April 26, 2002Date of Patent: June 24, 2003Assignees: Engelhard Corporation, TNO AutomotiveInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen
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Publication number: 20020152745Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: ApplicationFiled: April 26, 2002Publication date: October 24, 2002Applicant: Engelhard CorporationInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen
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Publication number: 20020148220Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: ApplicationFiled: April 26, 2002Publication date: October 17, 2002Applicant: Engelhard CorporationInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen
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Patent number: 6415602Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.Type: GrantFiled: October 16, 2000Date of Patent: July 9, 2002Assignees: Engelhard Corporation, TNO AutomotiveInventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen