Patents by Inventor Calvin K. Koch
Calvin K. Koch 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).
-
Patent number: 10738655Abstract: A turbocharger for an internal combustion engine having a close coupled catalyst assembly includes a turbine housing having a toroidal-shaped low pressure exhaust gas chamber having a plurality of vanes disposed proximate the outer circumferential wall of the low pressure exhaust gas chamber. The vanes are arranged to disrupt the rotational flow of the exhaust gases as they exit the turbine housing to provide a more even flow though the catalyst element of the close coupled catalyst assembly.Type: GrantFiled: May 24, 2018Date of Patent: August 11, 2020Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Calvin K. Koch, Marc L. Friedrich, Anil Yadav, John A. Schultz
-
Publication number: 20190360358Abstract: A turbocharger for an internal combustion engine having a close coupled catalyst assembly includes a turbine housing having a toroidal-shaped low pressure exhaust gas chamber having a plurality of vanes disposed proximate the outer circumferential wall of the low pressure exhaust gas chamber. The vanes are arranged to disrupt the rotational flow of the exhaust gases as they exit the turbine housing to provide a more even flow though the catalyst element of the close coupled catalyst assembly.Type: ApplicationFiled: May 24, 2018Publication date: November 28, 2019Inventors: Calvin K. Koch, Marc L. Friedrich, Anil Yadav, John A. Schultz
-
Patent number: 10066564Abstract: An engine control system for a vehicle includes an oxygen mass flow rate module, an oxygen per cylinder module, and a fuel control module. The oxygen mass flow rate module generates a mass flow rate of oxygen flowing into an engine based on a mass air flow rate (MAF) into the engine and a percentage of oxygen by volume measured using an intake oxygen (IO) sensor in an intake system. The oxygen per cylinder module generates a mass of oxygen for a combustion event of a cylinder of the engine based on the mass flow rate of oxygen flowing into the engine. The fuel control module controls fueling to the cylinder for the combustion event based on the mass of oxygen.Type: GrantFiled: June 7, 2012Date of Patent: September 4, 2018Assignee: GM Global Technology Operations LLCInventors: B. Jerry Song, Ethan E. Bayer, Ben W. Moscherosch, Calvin K. Koch
-
Publication number: 20180078912Abstract: An assembly for mixing liquid within a gas flow includes a hollow conduit that is configured for containing a flow of gas and liquid droplets. The assembly includes a hollow conduit having an inner wall and configured for containing a flow of gas and liquid droplets. A first plurality of spaced blades is disposed in the conduit in a first plane. A second plurality of spaced blades are disposed in the conduit in a second plane disposed downstream of the first plane, the second plurality of spaced blades being circumferentially offset from the first plurality of spaced blades. A third plurality of spaced blades are disposed in the conduit in a third plane disposed downstream of the second plane, the third plurality of spaced blades being circumferentially offset from the second plurality of spaced blades.Type: ApplicationFiled: September 16, 2016Publication date: March 22, 2018Inventors: Anil YADAV, Jianwen LI, Calvin K. KOCH, Rahul MITAL
-
Patent number: 9046051Abstract: A spark-ignition, direct-injection internal combustion engine is coupled to an exhaust aftertreatment system including a three-way catalytic converter upstream of an NH3-SCR catalyst. A method for operating the engine includes operating the engine in a fuel cutoff mode and coincidentally executing a second fuel injection control scheme upon detecting an engine load that permits operation in the fuel cutoff mode.Type: GrantFiled: June 9, 2011Date of Patent: June 2, 2015Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kushal Narayanaswamy, Calvin K. Koch, Paul M. Najt, Gerald A. Szekely, Jr., Joel G. Toner
-
Patent number: 8926926Abstract: A thin layer of low mean-pore-size filter material that permanently accommodates the accumulation of exhaust particulates (as soot or a soot cake) is carried on a porous ceramic support. The supported filter material is closely coupled with the exhaust manifold of the engine, for the purpose of passive regeneration of stored particulates, and removes particulate matter from the exhaust which is directed through the filter layer and ceramic support. The oxygen content of the exhaust oxidizes the particulate matter on the filter material. In a preferred embodiment, a thin layer of the filter material is supported on inlet channel walls of a wall flow-through ceramic filter body to remove the particles from the exhaust. The filter body comprises an upstream exhaust gas flow inlet face with openings to a plurality of inlet channels and a downstream face with a like plurality of openings from outlet channels. The inlet channels are closed at the downstream face and the outlet channels are closed at the inlet face.Type: GrantFiled: November 25, 2009Date of Patent: January 6, 2015Assignee: GM Global Technology Operations LLCInventors: Calvin K. Koch, Paul M. Najt, Kushal Narayanaswamy, David L. Hilden
-
Patent number: 8920756Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, in combination with another material selected as a passive NOx adsorber material (PNA), both the silver material and the adsorber material being close coupled to the exhaust manifold of a diesel engine, and upstream of other catalytic devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the flowing exhaust gas stream has heated the PNA and the downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.Type: GrantFiled: October 31, 2012Date of Patent: December 30, 2014Assignee: GM Global Technology Operations LLCInventors: Calvin K. Koch, Gongshin Qi, Steven J. Schmieg, Wei Li
-
Patent number: 8906331Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, close coupled to the exhaust manifold of a diesel engine, and upstream of other exhaust gas treatment devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver/alumina catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the exhaust has heated downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.Type: GrantFiled: October 31, 2012Date of Patent: December 9, 2014Assignee: GM Global Technology Operations LLCInventors: Calvin K. Koch, Gongshin Qi, Steven J. Schmieg, Wei Li
-
Publication number: 20130332050Abstract: An engine control system for a vehicle includes an oxygen mass flow rate module, an oxygen per cylinder module, and a fuel control module. The oxygen mass flow rate module generates a mass flow rate of oxygen flowing into an engine based on a mass air flow rate (MAF) into the engine and a percentage of oxygen by volume measured using an intake oxygen (IO) sensor in an intake system. The oxygen per cylinder module generates a mass of oxygen for a combustion event of a cylinder of the engine based on the mass flow rate of oxygen flowing into the engine. The fuel control module controls fueling to the cylinder for the combustion event based on the mass of oxygen.Type: ApplicationFiled: June 7, 2012Publication date: December 12, 2013Applicant: GM Global Technology Operations LLCInventors: B. Jerry Song, Ethan E. Bayer, Ben W. Moscherosch, Calvin K. Koch
-
Publication number: 20130294989Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, close coupled to the exhaust manifold of a diesel engine, and upstream of other exhaust gas treatment devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver/alumina catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the exhaust has heated downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.Type: ApplicationFiled: October 31, 2012Publication date: November 7, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: CALVIN K. KOCH, GONGSHIN QI, STEVEN J. SCHMIEG, WEI LI
-
Publication number: 20120316754Abstract: A spark-ignition, direct-injection internal combustion engine is coupled to an exhaust aftertreatment system including a three-way catalytic converter upstream of an NH3-SCR catalyst. A method for operating the engine includes operating the engine in a fuel cutoff mode and coincidentally executing a second fuel injection control scheme upon detecting an engine load that permits operation in the fuel cutoff mode.Type: ApplicationFiled: June 9, 2011Publication date: December 13, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kushal Narayanaswamy, Calvin K. Koch, Paul M. Najt, Gerald A. Szekely, JR., Joel G. Toner
-
Patent number: 8001768Abstract: The disclosure sets forth operating a spark-ignition, direct-fuel injection internal combustion engine equipped with an exhaust aftertreatment system including a lean-NOx reduction catalyst upstream of a second converter element. The engine preferentially operates in one of a homogeneous charge combustion mode and a stratified charge combustion mode based upon temperature of the lean-NOx reduction catalyst. Exhaust gas flow is selectively diverted to the second converter element.Type: GrantFiled: February 1, 2008Date of Patent: August 23, 2011Assignee: GM Global Technology Operations LLCInventors: David J. Cleary, Calvin K. Koch, Wei Li
-
Publication number: 20110120089Abstract: A thin layer of low mean-pore-size filter material that permanently accommodates the accumulation of exhaust particulates (as soot or a soot cake) is carried on a porous ceramic support. The supported filter material is closely coupled with the exhaust manifold of the engine, for the purpose of passive regeneration of stored particulates, and removes particulate matter from the exhaust which is directed through the filter layer and ceramic support. The oxygen content of the exhaust oxidizes the particulate matter on the filter material. In a preferred embodiment, a thin layer of the filter material is supported on inlet channel walls of a wall flow-through ceramic filter body to remove the particles from the exhaust. The filter body comprises an upstream exhaust gas flow inlet face with openings to a plurality of inlet channels and a downstream face with a like plurality of openings from outlet channels. The inlet channels are closed at the downstream face and the outlet channels are closed at the inlet face.Type: ApplicationFiled: November 25, 2009Publication date: May 26, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Calvin K. Koch, Paul M. Najt, Kushal Narayanaswamy, David L. Hilden
-
Patent number: 7571602Abstract: The present invention is an aftertreatment system for lean burn internal combustion engines. The present invention provides a multiple branch lean NOx trap, or LNT, with a diverter valve operable to selectively direct lean exhaust flow to one portion of the LNT while another portion of the LNT regenerates in a low oxygen environment. Additionally, the present invention employees a continuously operating side stream exhaust fuel reformer that delivers a reductant, such as partially oxidized (POx) gas or reformate, to the LNT for regeneration. The present invention also provides a method of exhaust aftertreatment of a lean burn internal combustion engine utilizing the system provided.Type: GrantFiled: May 3, 2006Date of Patent: August 11, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Calvin K. Koch
-
Publication number: 20090193792Abstract: The disclosure sets forth operating a spark-ignition, direct-fuel injection internal combustion engine equipped with an exhaust aftertreatment system including a lean-NOx reduction catalyst upstream of a second converter element. The engine preferentially operates in one of a homogeneous charge combustion mode and a stratified charge combustion mode based upon temperature of the lean-NOx reduction catalyst. Exhaust gas flow is selectively diverted to the second converter element.Type: ApplicationFiled: February 1, 2008Publication date: August 6, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: David J. Cleary, Calvin K. Koch, Wei Li
-
Patent number: 7267697Abstract: A fuel reforming system includes an inlet device for a reactor having a housing defining a frustoconical interior region having an inlet opening and an outlet opening. A tube mixer having a helical divider may be optionally employed to transfer fluid into the inlet opening. A retention member is placed at each of the openings and a plurality of particles is contained within the frustoconical interior region between the retention members. An insulator placed between the outlet opening and the catalyst reaction surface minimizes temperature non-uniformities over the catalyst surface area, which preserves the catalyst contained within the reaction surface and prevents premature onset of the reaction prior to contact of a reactant mixture with the reaction surface. As a reactant fluid material passes through the inlet device it forms a homogenous reactant fluid material which then flows onto a catalytic reaction surface to form a reformate.Type: GrantFiled: September 15, 2003Date of Patent: September 11, 2007Assignee: General Motors CorporationInventors: Michael Bart Viola, Changsoo Kim, Calvin K. Koch