Patents by Inventor Claude M. Johnson
Claude M. Johnson 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: 9957864Abstract: A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period.Type: GrantFiled: July 7, 2014Date of Patent: May 1, 2018Assignees: Cummins Distribution Holdco Inc., Cummins PowerGen IP, Inc.Inventors: Claude M. Johnson, Eric G. Wiemers
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Patent number: 9482154Abstract: An exhaust gas collector for use in a duct of an exhaust gas aftertreatment system includes generally T-shaped tubular sample members having closed upstream ends, downstream ends and spaced apart exhaust collection holes. The downstream ends of the tubular members are fluidly coupled at a common collection location in the center of the duct. The tubular members are positioned in the duct with the exhaust collection holes at locations distributed across a cross sectional area of a duct to collect exhaust samples from across the cross sectional area of the duct. All exhaust gas samples collected by the exhaust gas collector are collected by one of the sample members having a downstream end coupled to the common collection location. A non-sample collecting accumulator tube is fluidly coupled to the common collection location of the tubular sample members. A sensor senses the mixed exhaust gas in the accumulator tube.Type: GrantFiled: December 5, 2012Date of Patent: November 1, 2016Assignees: Cummins Cal Pacific, LLC, Cummins PowerGen IP, Inc.Inventors: Herman Van Niekerk, Claude M. Johnson
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Patent number: 9333466Abstract: A diesel exhaust fluid (DEF) injector assembly is provided for use in an engine exhaust after-treatment system. The DEF injector assembly includes an injector body having a fluid inlet and a fluid outlet that delivers the DEF to an engine exhaust stream. The DEF injector assembly may also include a valve that opens and closes the fluid outlet of the injector body. An exemplary DEF injector assembly further includes an impact structure with an inclined impact surface that disperses and distributes the injected DEF into the engine exhaust stream. Another exemplary DEF injector assembly further includes a shroud that insulates the injector body.Type: GrantFiled: December 5, 2012Date of Patent: May 10, 2016Assignees: CUMMINS POWERGEN IP, INC., CUMMINS CAL PACIFIC, LLCInventors: Claude M. Johnson, Mark Yragui, Herman Van Niekerk, Farzan Roshdieh
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Publication number: 20140318104Abstract: A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period.Type: ApplicationFiled: July 7, 2014Publication date: October 30, 2014Inventors: Claude M. Johnson, Eric G. Wiemers
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Patent number: 8806853Abstract: A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period.Type: GrantFiled: December 5, 2012Date of Patent: August 19, 2014Assignees: Cummins Powergen IP, Inc., Cummins Cal Pacific, LLCInventors: Claude M. Johnson, Eric G. Wiemers
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Publication number: 20140150433Abstract: An exhaust gas collector for use in a duct of an exhaust gas aftertreatment system includes generally T-shaped tubular sample members having closed upstream ends, downstream ends and spaced apart exhaust collection holes. The downstream ends of the tubular members are fluidly coupled at a common collection location in the center of the duct. The tubular members are positioned in the duct with the exhaust collection holes at locations distributed across a cross sectional area of a duct to collect exhaust samples from across the cross sectional area of the duct. All exhaust gas samples collected by the exhaust gas collector are collected by one of the sample members having a downstream end coupled to the common collection location. A non-sample collecting accumulator tube is fluidly coupled to the common collection location of the tubular sample members. A sensor senses the mixed exhaust gas in the accumulator tube.Type: ApplicationFiled: December 5, 2012Publication date: June 5, 2014Inventors: Herman Van Niekerk, Claude M. Johnson
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Publication number: 20140150405Abstract: A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period.Type: ApplicationFiled: December 5, 2012Publication date: June 5, 2014Inventors: Claude M. Johnson, Eric G. Wiemers
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Publication number: 20140154142Abstract: A diesel exhaust fluid (DEF) injector assembly is provided for use in an engine exhaust after-treatment system. The DEF injector assembly includes an injector body having a fluid inlet and a fluid outlet that delivers the DEF to an engine exhaust stream. The DEF injector assembly may also include a valve that opens and closes the fluid outlet of the injector body. An exemplary DEF injector assembly further includes an impact structure with an inclined impact surface that disperses and distributes the injected DEF into the engine exhaust stream. Another exemplary DEF injector assembly further includes a shroud that insulates the injector body.Type: ApplicationFiled: December 5, 2012Publication date: June 5, 2014Inventors: Claude M. Johnson, Mark Yragui, Herman Van Niekerk, Farzan Roshdieh