Patents by Inventor Jeremy T. Demarest
Jeremy T. Demarest 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: 11143066Abstract: A crankshaft assembly for a vehicle, a method of operating a crankshaft assembly, and a method of manufacturing a crankshaft assembly. The crankshaft assembly includes a crankshaft, a first pin bearing journal and a main journal, an oil passage having a main passage wall, the oil passage extending from the first pin bearing journal to or through the main bearing journal, a crankpin exit hole located in the main passage wall, and a blocking element positioned in the oil passage, wherein the blocking element is located in a radially outward position with respect to the crankpin exit hole.Type: GrantFiled: January 2, 2019Date of Patent: October 12, 2021Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Dale E. Murrish, Luke Luehr, Scott A. Hucker, Varoon Shankar, Jeremy T. Demarest
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Publication number: 20200208548Abstract: A crankshaft assembly for a vehicle, a method of operating a crankshaft assembly, and a method of manufacturing a crankshaft assembly. The crankshaft assembly includes a crankshaft, a first pin bearing journal and a main journal, an oil passage having a main passage wall, the oil passage extending from the first pin bearing journal to or through the main bearing journal, a crankpin exit hole located in the main passage wall, and a blocking element positioned in the oil passage, wherein the blocking element is located in a radially outward position with respect to the crankpin exit hole.Type: ApplicationFiled: January 2, 2019Publication date: July 2, 2020Inventors: Dale E. Murrish, Luke Luehr, Scott A. Hucker, Varoon Shankar, Jeremy T. Demarest
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Patent number: 10480507Abstract: A gerotor assembly is provided which includes a crankshaft, an inner drive gear, an outer driven gear and a housing defining an oil groove. The inner drive gear defines a plurality of inner gear teeth. The outer driven gear defines a plurality of outer gear teeth operatively configured to engage with the inner gear teeth. The outer drive gear may define a plurality of passageways to form a hydrodynamic film between the outer driven gear and the housing. Alternatively, a high pressure oil pump may feed oil into the oil groove in order to distribute a hydrodynamic film.Type: GrantFiled: September 1, 2016Date of Patent: November 19, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Sean M McGowan, Joel H Pike, John B Davis, Bryan K Pryor, Mark R Claywell, Jeremy T Demarest
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Publication number: 20180058450Abstract: A gerotor assembly is provided which includes a crankshaft, an inner drive gear, an outer driven gear and a housing defining an oil groove. The inner drive gear defines a plurality of inner gear teeth. The outer driven gear defines a plurality of outer gear teeth operatively configured to engage with the inner gear teeth. The outer drive gear may define a plurality of passageways to form a hydrodynamic film between the outer driven gear and the housing. Alternatively, a high pressure oil pump may feed oil into the oil groove in order to distribute a hydrodynamic film.Type: ApplicationFiled: September 1, 2016Publication date: March 1, 2018Inventors: Sean M. McGowan, Joel H. Pike, John B. Davis, Bryan K. Pryor, Mark R. Claywell, Jeremy T. Demarest
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Patent number: 9353655Abstract: An engine control system includes a cylinder control module and a pump control module. The cylinder control module selectively deactivates cylinders of an engine. In response to a determination that at least one of the cylinders is deactivated, the pump control module: selectively increases a target displacement for an oil pump that is driven by a balance shaft of the engine; and selectively adjusts displacement of the oil pump based on the target displacement.Type: GrantFiled: March 8, 2013Date of Patent: May 31, 2016Assignee: GM Global Technology Operations LLCInventors: Jeremy T. Demarest, Ronald J. Pierik, Eric D. Staley
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Publication number: 20140251273Abstract: An engine control system includes a cylinder control module and a pump control module. The cylinder control module selectively deactivates cylinders of an engine. In response to a determination that at least one of the cylinders is deactivated, the pump control module: selectively increases a target displacement for an oil pump that is driven by a balance shaft of the engine; and selectively adjusts displacement of the oil pump based on the target displacement.Type: ApplicationFiled: March 8, 2013Publication date: September 11, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Jeremy T. Demarest, Ronald J. Pierik, Eric D. Staley
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Publication number: 20140163839Abstract: A control system for an engine includes a torque modifier module that selects one of a plurality of torque modifier values based on variations in an accessory load. A torque calculating module calculates a maximum torque value for operation in a cylinder deactivation mode based on the selected one of the plurality of torque modifier values. A torque control module selectively switches the engine between the cylinder deactivation mode and a cylinder activation mode based on the maximum torque value.Type: ApplicationFiled: December 12, 2012Publication date: June 12, 2014Applicant: GM Global Technology Operations LLCInventors: Eric D. Staley, Ronald J. Pierik, Jeremy T. Demarest, Timothy M. Karnjate
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Publication number: 20090107449Abstract: A windage tray apparatus is provided and is configured to be mountable within a crankcase at least partially defined by an engine block of an internal combustion engine. The crankcase has a first bay and a non-adjacent second bay. The internal combustion engine has a crankshaft rotatably supported within the crankcase. The windage tray includes a tray member and a passage at least partially defined by said tray member and in communication with the first bay and the non-adjacent second bay. The passage is operable to allow gas transfer between the first bay and the non-adjacent second bay to reduce the motoring friction of the internal combustion engine. An internal combustion engine incorporating the disclosed windage tray apparatus is also provided.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: David R. Staley, Alan W. Hayman, Jeremy T. Demarest, James J. Mazzola, III, Frederick J. Rozario
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Patent number: 7516728Abstract: A windage tray apparatus is provided and is configured to be mountable within a crankcase at least partially defined by an engine block of an internal combustion engine. The crankcase has a first bay and a non-adjacent second bay. The internal combustion engine has a crankshaft rotatably supported within the crankcase. The windage tray includes a tray member and a passage at least partially defined by said tray member and in communication with the first bay and the non-adjacent second bay. The passage is operable to allow gas transfer between the first bay and the non-adjacent second bay to reduce the motoring friction of the internal combustion engine. An internal combustion engine incorporating the disclosed windage tray apparatus is also provided.Type: GrantFiled: October 31, 2007Date of Patent: April 14, 2009Assignee: GM Global Technology Operations, Inc.Inventors: David R. Staley, Alan W. Hayman, Jeremy T. Demarest, James J. Mazzola, III, Frederick J. Rozario