Patents by Inventor Daniel B. Glassford

Daniel B. Glassford 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: 8978596
    Abstract: A powertrain cooling system includes a coolant pump and coolant flow passages. A first three-position valve is operatively connected with an outlet of the coolant pump and has a first, a second, and a third position to at least partially establish different coolant flow modes through the coolant flow passages. Coolant flow from the coolant pump is blocked from both the cylinder head and the engine block in a first coolant flow mode when the three-position valve is in the first position. Coolant flow from the coolant pump is provided to the cylinder head and is blocked from the engine block in a second coolant flow mode when the three-position valve is in the second position. Coolant flows from the coolant pump to the engine block and from the engine block to the cylinder head in a third coolant flow mode when the three-position valve is in the third position.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: March 17, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Daniel B. Glassford
  • Patent number: 8944017
    Abstract: A cooling system has an engine heat exchanger in thermal communication with engine oil in an engine. A transmission heat exchanger is in thermal communication with transmission oil in a transmission. A pump has a pump inlet and a pump outlet. A valve assembly is in fluid communication with the pump outlet and has a first and a second position that at least partially establish different coolant flow modes through a plurality of coolant flow passages. The valve assembly has a first inlet that receives coolant that flows from the pump outlet, to an engine inlet, then through the engine to an engine outlet. The valve assembly has a second inlet that receives coolant that flows from the pump outlet and bypasses the engine. The valve assembly has a single outlet that directs coolant flow to at least one of the engine heat exchanger and the transmission heat exchanger.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: February 3, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Daniel B. Glassford
  • Publication number: 20140352636
    Abstract: A cooling system has an engine heat exchanger in thermal communication with engine oil in an engine. A transmission heat exchanger is in thermal communication with transmission oil in a transmission. A pump has a pump inlet and a pump outlet. A valve assembly is in fluid communication with the pump outlet and has a first and a second position that at least partially establish different coolant flow modes through a plurality of coolant flow passages. The valve assembly has a first inlet that receives coolant that flows from the pump outlet, to an engine inlet, then through the engine to an engine outlet. The valve assembly has a second inlet that receives coolant that flows from the pump outlet and bypasses the engine. The valve assembly has a single outlet that directs coolant flow to at least one of the engine heat exchanger and the transmission heat exchanger.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Daniel B. Glassford
  • Publication number: 20140000536
    Abstract: A powertrain cooling system includes a coolant pump and coolant flow passages. A first three-position valve is operatively connected with an outlet of the coolant pump and has a first, a second, and a third position to at least partially establish different coolant flow modes through the coolant flow passages. Coolant flow from the coolant pump is blocked from both the cylinder head and the engine block in a first coolant flow mode when the three-position valve is in the first position. Coolant flow from the coolant pump is provided to the cylinder head and is blocked from the engine block in a second coolant flow mode when the three-position valve is in the second position. Coolant flows from the coolant pump to the engine block and from the engine block to the cylinder head in a third coolant flow mode when the three-position valve is in the third position.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Daniel B. Glassford
  • Patent number: 8413434
    Abstract: An exhaust heat recovery system (EHRS) for a vehicle is provided that is operable to direct coolant heated by exhaust heat to a vehicle transmission under certain operating conditions after the engine is adequately heated by the exhaust heat and without further heating the engine with the exhaust heat. Thus, recovery of exhaust heat is increased as the transmission is heated to a higher operating temperature than the engine using the heated coolant. The EHRS may also operate in a bypass mode during which exhaust heat is not directed to the engine or the transmission. A method of managing exhaust heat is also provided.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: April 9, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Prior, George M. Claypole, Daniel B. Glassford
  • Patent number: 8359845
    Abstract: An apparatus for a vehicle with an engine is provided that accomplishes exhaust heat recovery and exhaust gas recirculation with a common heat exchanger used for both purposes. The apparatus includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first position to direct the exhaust gas through the heat exchanger to transfer heat to the coolant flow passages in a coolant heating mode, and operable in a second position in which the exhaust gas bypasses the heat exchanger in a bypass mode during which no significant coolant heating occurs via the heat exchanger. A portion of the exhaust gas is recirculated to the engine after cooling via the heat exchanger.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: January 29, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Prior, Daniel B. Glassford
  • Patent number: 8341951
    Abstract: An apparatus is provided for a vehicle with an engine that includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned at least partially within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first mode to direct the exhaust gas across the heat exchanger along a first flow path to transfer exhaust heat to the coolant flow passages, and is further operable in a second mode to direct at least a portion of the exhaust gas across the heat exchanger along a second flow path to transfer exhaust heat to the coolant flow passages in a second coolant heating mode. The second flow path is restricted relative to the first flow path. A method of managing exhaust heat recovery is also provided.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: January 1, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Prior, Daniel B. Glassford
  • Patent number: 8286424
    Abstract: An apparatus is provided that includes a thermoelectric generator and an exhaust gas system operatively connected to the thermoelectric generator to heat a portion of the thermoelectric generator with exhaust gas flow through the thermoelectric generator. A coolant system is operatively connected to the thermoelectric generator to cool another portion of the thermoelectric generator with coolant flow through the thermoelectric generator. At least one valve is controllable to cause the coolant flow through the thermoelectric generator in a direction that opposes a direction of the exhaust gas flow under a first set of operating conditions and to cause the coolant flow through the thermoelectric generator in the direction of exhaust gas flow under a second set of operating conditions.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: October 16, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Prior, Gregory P. Meisner, Daniel B. Glassford
  • Publication number: 20110239635
    Abstract: An apparatus is provided that includes a thermoelectric generator and an exhaust gas system operatively connected to the thermoelectric generator to heat a portion of the thermoelectric generator with exhaust gas flow through the thermoelectric generator. A coolant system is operatively connected to the thermoelectric generator to cool another portion of the thermoelectric generator with coolant flow through the thermoelectric generator. At least one valve is controllable to cause the coolant flow through the thermoelectric generator in a direction that opposes a direction of the exhaust gas flow under a first set of operating conditions and to cause the coolant flow through the thermoelectric generator in the direction of exhaust gas flow under a second set of operating conditions.
    Type: Application
    Filed: April 2, 2010
    Publication date: October 6, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Gregory P. Prior, Gregory P. Meisner, Daniel B. Glassford
  • Publication number: 20110099989
    Abstract: An apparatus is provided for a vehicle with an engine that includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned at least partially within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first mode to direct the exhaust gas across the heat exchanger along a first flow path to transfer exhaust heat to the coolant flow passages, and is further operable in a second mode to direct at least a portion of the exhaust gas across the heat exchanger along a second flow path to transfer exhaust heat to the coolant flow passages in a second coolant heating mode. The second flow path is restricted relative to the first flow path. A method of managing exhaust heat recovery is also provided.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 5, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Gregory P. Prior, Daniel B. Glassford
  • Publication number: 20110088672
    Abstract: An apparatus for a vehicle with an engine is provided that accomplishes exhaust heat recovery and exhaust gas recirculation with a common heat exchanger used for both purposes. The apparatus includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first position to direct the exhaust gas through the heat exchanger to transfer heat to the coolant flow passages in a coolant heating mode, and operable in a second position in which the exhaust gas bypasses the heat exchanger in a bypass mode during which no significant coolant heating occurs via the heat exchanger. A portion of the exhaust gas is recirculated to the engine after cooling via the heat exchanger.
    Type: Application
    Filed: October 16, 2009
    Publication date: April 21, 2011
    Applicant: GM GLOBAL TECHNOLGY OPERATIONS, INC.
    Inventors: Gregory P. Prior, Daniel B. Glassford
  • Publication number: 20110088378
    Abstract: An exhaust heat recovery system (EHRS) for a vehicle is provided that is operable to direct coolant heated by exhaust heat to a vehicle transmission under certain operating conditions after the engine is adequately heated by the exhaust heat and without further heating the engine with the exhaust heat. Thus, recovery of exhaust heat is increased as the transmission is heated to a higher operating temperature than the engine using the heated coolant. The EHRS may also operate in a bypass mode during which exhaust heat is not directed to the engine or the transmission. A method of managing exhaust heat is also provided.
    Type: Application
    Filed: October 21, 2009
    Publication date: April 21, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATION, INC.
    Inventors: Gregory P. Prior, George M. Claypole, Daniel B. Glassford