Patents by Inventor Leon A. LaPointe

Leon A. LaPointe 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).

  • Publication number: 20190003419
    Abstract: An engine waste heat recovery (WHR) system includes a turbocharger WHR portion, an exhaust WHR portion, an expander in the exhaust WHR portion, a condenser, valves, and a controller. The expander receives a working fluid in a superheated form and converts thermal energy in the working fluid into mechanical energy or electrical energy. The condenser condenses the working fluid for recirculation through the engine WHR system. The recuperator is fluidly coupled between the expander and the condenser to allow the working fluid to flow from the expander to the condenser. The recuperator transfers thermal energy to a flow of the working fluid from the turbocharger WHR portion. Each valve is fluidly coupled to one of the turbocharger WHR portion and the exhaust WHR portion. The controller is electrically coupled to the valves, and the controller selectively controls the valves to selectively circulate the working fluid through the engine WHR system.
    Type: Application
    Filed: December 21, 2015
    Publication date: January 3, 2019
    Applicant: CUMMINS INC.
    Inventors: Prashant P. Patel, Prashaanth Ravindran, Christopher R. Nelson, Leon A. Lapointe
  • Patent number: 10138800
    Abstract: A system and method for condensation management in a low-pressure loop EGR system are provided. The system includes an EGR condensation temperature module configured to determine an EGR condensation temperature of recirculated exhaust gas upstream of an EGR cooler and an EGR coolant temperature controller communicably coupled to the EGR condensation temperature module. The EGR coolant temperature controller provides EGR coolant to the EGR cooler at or above the EGR condensation temperature. The system also includes a charge air condensation temperature module configured to determine a charge air condensation temperature of charge air upstream of a charge air cooler and a charge air coolant temperature controller communicably coupled to the charge air condensation temperature module. The charge air coolant temperature controller provides charge air coolant to the charge air cooler at or above the charge air condensation temperature.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: November 27, 2018
    Assignee: Cummins, Inc.
    Inventors: Leon A. LaPointe, Daniel J. Mohr, Edward J. Lyford-Pike, Ashish Gupta
  • Patent number: 9845772
    Abstract: A system and method for condensation management in a low-pressure loop EGR system are provided. The system includes an EGR condensation temperature module configured to determine an EGR condensation temperature of recirculated exhaust gas upstream of an EGR cooler and an EGR coolant temperature controller communicably coupled to the EGR condensation temperature module. The EGR coolant temperature controller provides EGR coolant to the EGR cooler at or above the EGR condensation temperature. The system also includes a charge air condensation temperature module configured to determine a charge air condensation temperature of charge air upstream of a charge air cooler and a charge air coolant temperature controller communicably coupled to the charge air condensation temperature module. The charge air coolant temperature controller provides charge air coolant to the charge air cooler at or above the charge air condensation temperature.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 19, 2017
    Assignee: Cummins, Inc.
    Inventors: Leon A. LaPointe, Daniel J. Mohr, Edward J. Lyford-Pike, Ashish Gupta
  • Patent number: 9797296
    Abstract: Described herein is a combustion pre-chamber apparatus for a main combustion chamber of an internal combustion engine that includes a body that defines an internal combustion cavity. The apparatus also includes at least one orifice that extends through the body. The at least one orifice includes a first end open to the internal combustion cavity and a second end open to the main combustion chamber. The first end is bigger than the second end.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 24, 2017
    Assignee: Cummins Inc.
    Inventors: Premjee Sasidharan, Leon A. LaPointe
  • Patent number: 9778237
    Abstract: Disclosed are methods, systems, and computer-readable mediums for determining combustion properties of wellhead gas. A methane concentration of a gas mixture is measured. A non-methane hydrocarbon concentration of the gas mixture is measured. An inert concentration of the gas mixture is calculated. A first surrogate for the non-methane hydrocarbon concentration is selected, where the first surrogate is selected as propane if the methane concentration is greater than a first threshold, and where the first surrogate is selected as pentane if the methane concentration is less than or equal to the first threshold. A methane number of the gas mixture is determined, where the methane number is based on the methane concentration, the first surrogate, and the inert concentration.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: October 3, 2017
    Assignee: Cummins, Inc.
    Inventors: Shu Li, Leon A. LaPointe, Aniket Gupta, Matthew L. Schneider
  • Publication number: 20170269051
    Abstract: Disclosed are methods, systems, and computer-readable mediums for determining the composition of gaseous fuel. An initial gaseous fuel stream is provided that includes methane, non-methane hydrocarbons, and inert gases. Air is mixed into the initial fuel stream upstream of a first catalyst. The first catalyst oxidizes only the non-methane hydrocarbons of the initial fuel stream to produce a resultant fuel stream comprising methane and inert gases. Air is mixed into the resultant fuel stream downstream of the first catalyst and upstream of a second catalyst. The second catalyst oxidizes only the methane hydrocarbons of the resultant fuel stream to produce an output fuel stream. Mole ratios of the methane, the non-methane hydrocarbons, and the inert gases of the initial fuel stream are each determined.
    Type: Application
    Filed: August 17, 2015
    Publication date: September 21, 2017
    Applicant: Cummings, Inc.
    Inventor: Leon A. LaPointe
  • Publication number: 20170211508
    Abstract: An engine including a gaseous fuel system; a cylinder including a flat combustion face, the flat combustion face including four valves, each valve positioned in a port, the four valves including two intake valves positioned to selectively meter intake of charge into the cylinder via respective ports and including two exhaust valves positioned to selectively meter output of exhaust from the cylinder via respective ports. Intake valves are larger than exhaust valves and an ignition source is offset from center of a combustion surface.
    Type: Application
    Filed: June 30, 2015
    Publication date: July 27, 2017
    Inventors: Patrick M. Pierz, Leon A. LaPointe
  • Publication number: 20160319779
    Abstract: A system and method for condensation management in a low-pressure loop EGR system are provided. The system includes an EGR condensation temperature module configured to determine an EGR condensation temperature of recirculated exhaust gas upstream of an EGR cooler and an EGR coolant temperature controller communicably coupled to the EGR condensation temperature module. The EGR coolant temperature controller provides EGR coolant to the EGR cooler at or above the EGR condensation temperature. The system also includes a charge air condensation temperature module configured to determine a charge air condensation temperature of charge air upstream of a charge air cooler and a charge air coolant temperature controller communicably coupled to the charge air condensation temperature module. The charge air coolant temperature controller provides charge air coolant to the charge air cooler at or above the charge air condensation temperature.
    Type: Application
    Filed: April 30, 2015
    Publication date: November 3, 2016
    Inventors: Leon A. LaPointe, Daniel J. Mohr, Edward J. Lyford-Pike, Ashish Gupta
  • Publication number: 20160290288
    Abstract: A system and method for condensation management in a low-pressure loop EGR system are provided. The system includes an EGR condensation temperature module configured to determine an EGR condensation temperature of recirculated exhaust gas upstream of an EGR cooler and an EGR coolant temperature controller communicably coupled to the EGR condensation temperature module. The EGR coolant temperature controller provides EGR coolant to the EGR cooler at or above the EGR condensation temperature. The system also includes a charge air condensation temperature module configured to determine a charge air condensation temperature of charge air upstream of a charge air cooler and a charge air coolant temperature controller communicably coupled to the charge air condensation temperature module. The charge air coolant temperature controller provides charge air coolant to the charge air cooler at or above the charge air condensation temperature.
    Type: Application
    Filed: April 3, 2015
    Publication date: October 6, 2016
    Inventors: Leon A. LaPointe, Daniel J. Mohr, Edward J. Lyford-Pike, Ashish Gupta
  • Patent number: 9359968
    Abstract: An apparatus for dithering fuel into an internal combustion engine includes a turbine that is powered by the internal combustion engine and a first fuel injector that injects a first fuel into an air stream to create a fuel/air stream. The apparatus also includes an air/fuel compressor that provides a compressed fuel/air stream to the internal combustion engine. The air/fuel compressor is powered by the turbine, and the air/fuel compressor compresses the fuel/air stream to create the compressed fuel/air stream. Additionally, the apparatus includes a second fuel injector that injects a second fuel into the compressed fuel/air stream prior to the compressed fuel/air stream entering the engine and after the compressed fuel/air stream exits the air/fuel compressor.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: June 7, 2016
    Assignee: CUMMINS IP, INC.
    Inventors: Leon A. LaPointe, Edward J. Lyford-Pike, Daniel J. Mohr, Ashish Gupta, James A. Zigan
  • Patent number: 9347359
    Abstract: Described herein is an air dithering system for an internal combustion engine generating exhaust gas that includes an exhaust line in exhaust gas receiving communication with the internal combustion engine. The system also includes an exhaust aftertreatment component positioned within the exhaust line in exhaust gas receiving communication with exhaust gas in the exhaust line. Further, the system includes an air injector in air injecting communication with exhaust gas in the exhaust line at a location downstream of the internal combustion engine and upstream of the exhaust aftertreatment component.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 24, 2016
    Assignee: CUMMINS IP, INC.
    Inventors: Leon A. LaPointe, Scott Miles, Jay Shah
  • Patent number: 9279394
    Abstract: An internal combustion engine system includes a spark-ignited internal combustion engine powered by a gaseous fuel. The engine system also includes an air intake in air providing communication with the internal combustion engine. Further, the engine system includes an exhaust system in exhaust gas receiving communication with the internal combustion engine. The exhaust system includes a methane oxidation catalyst through which at least a portion of the exhaust gas flows and an exhaust gas recirculation line in exhaust gas providing communication with the air intake.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: March 8, 2016
    Assignee: Cummins IP, Inc.
    Inventors: Leon A. LaPointe, Edward J. Lyford-Pike, Daniel J. Mohr, Ashish Gupta, Aleksey Yezerets, Neal W. Currier, Tamas Szailer, Thomas M. Yonushonis
  • Publication number: 20150300297
    Abstract: An internal combustion engine system includes a spark-ignited internal combustion engine powered by a gaseous fuel. The engine system also includes an air intake in air providing communication with the internal combustion engine. Further, the engine system includes an exhaust system in exhaust gas receiving communication with the internal combustion engine. The exhaust system includes a methane oxidation catalyst through which at least a portion of the exhaust gas flows and an exhaust gas recirculation line in exhaust gas providing communication with the air intake.
    Type: Application
    Filed: June 30, 2015
    Publication date: October 22, 2015
    Applicant: CUMMINS IP, INC.
    Inventors: Leon A. LaPointe, Edward J. Lyford-Pike, Daniel J. Mohr, Ashish Gupta, Aleksey Yezerets, Neal W. Currier, Tamas Szailer, Thomas M. Yonushonis
  • Publication number: 20150241399
    Abstract: Disclosed are methods, systems, and computer-readable mediums for determining combustion properties of wellhead gas. A methane concentration of a gas mixture is measured. A non-methane hydrocarbon concentration of the gas mixture is measured. An inert concentration of the gas mixture is calculated. A first surrogate for the non-methane hydrocarbon concentration is selected, where the first surrogate is selected as propane if the methane concentration is greater than a first threshold, and where the first surrogate is selected as pentane if the methane concentration is less than or equal to the first threshold. A methane number of the gas mixture is determined, where the methane number is based on the methane concentration, the first surrogate, and the inert concentration.
    Type: Application
    Filed: February 25, 2015
    Publication date: August 27, 2015
    Applicant: Cummins, Inc.
    Inventors: Shu Li, Leon A. LaPointe, Aniket Gupta, Matthew L. Schneider
  • Publication number: 20150020766
    Abstract: The disclosure is directed to an internal combustion engine having an improved prechamber device. The prechamber device includes features that provide improved mixing of fuel and air, specifically, a plurality of ribs positioned in a cavity of the prechamber device. The improved mixing of fuel and air yields improved uniformity of combustion in an associated combustion chamber.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Inventors: Leon A. LaPointe, Premjee Sasidharan
  • Publication number: 20140261351
    Abstract: An apparatus for dithering fuel into an internal combustion engine includes a turbine that is powered by the internal combustion engine and a first fuel injector that injects a first fuel into an air stream to create a fuel/air stream. The apparatus also includes an air/fuel compressor that provides a compressed fuel/air stream to the internal combustion engine. The air/fuel compressor is powered by the turbine, and the air/fuel compressor compresses the fuel/air stream to create the compressed fuel/air stream. Additionally, the apparatus includes a second fuel injector that injects a second fuel into the compressed fuel/air stream prior to the compressed fuel/air stream entering the engine and after the compressed fuel/air stream exits the air/fuel compressor.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 18, 2014
    Applicant: Cummins IP, Inc.
    Inventors: Leon A. LaPointe, Edward J. Lyford-Pike, Daniel J. Mohr, Ashish Gupta, James A. Zigan
  • Publication number: 20140260196
    Abstract: Described herein is an air dithering system for an internal combustion engine generating exhaust gas that includes an exhaust line in exhaust gas receiving communication with the internal combustion engine. The system also includes an exhaust aftertreatment component positioned within the exhaust line in exhaust gas receiving communication with exhaust gas in the exhaust line. Further, the system includes an air injector in air injecting communication with exhaust gas in the exhaust line at a location downstream of the internal combustion engine and upstream of the exhaust aftertreatment component.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Leon A. LaPointe, Scott Miles, Jay Shah
  • Publication number: 20140260203
    Abstract: A system and method for reforming a portion of an exhaust gas stream in an internal combustion engine system. An exhaust gas recirculation assembly divides the exhaust gas stream into a recycle stream and a vent stream. A mixer in fluid receiving communication with the recycle stream forms a combination stream by mixing a gaseous fuel stream with the recycle stream. A thermochemical recuperator component fluidly connects to the mixer and includes a first flow path and a second flow path. The first flow path has a catalyst through which the combination stream flows to create a reformate stream, and the second flow path has a heat transfer area for transferring heat from the vent stream to the combination stream.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Cummins IP, Inc.
    Inventors: Leon A. LaPointe, Edward J. Lyford-Pike, Daniel J. Mohr, Ashish Gupta
  • Publication number: 20140261298
    Abstract: Described herein is a combustion pre-chamber apparatus for a main combustion chamber of an internal combustion engine that includes a body that defines an internal combustion cavity. The apparatus also includes at least one orifice that extends through the body. The at least one orifice includes a first end open to the internal combustion cavity and a second end open to the main combustion chamber. The first end is bigger than the second end.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Premjee Sasidharan, Leon A. LaPointe
  • Publication number: 20140069086
    Abstract: An internal combustion engine system includes a spark-ignited internal combustion engine powered by a gaseous fuel. The engine system also includes an air intake in air providing communication with the internal combustion engine. Further, the engine system includes an exhaust system in exhaust gas receiving communication with the internal combustion engine. The exhaust system includes a methane oxidation catalyst through which at least a portion of the exhaust gas flows and an exhaust gas recirculation line in exhaust gas providing communication with the air intake.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Inventors: LEON A. LAPOINTE, EDWARD J. LYFORD-PIKE, DANIEL J. MOHR, ASHISH GUPTA, ALEKSEY YEZERETS, NEAL W. CURRIER, TAMAS SZAILER, THOMAS YONUSHONIS