Patents by Inventor Rishikesh VENUGOPAL
Rishikesh VENUGOPAL 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: 10465616Abstract: A compression-ignited, opposed-piston engine equipped for multi-fuel operation includes at least one cylinder, a pair of pistons slidably disposed in the cylinder for opposing movement between respective bottom and fop center locations, and spaced-apart intake and exhaust ports near respective ends of the cylinder. The pistons include end surfaces constructed to form a shaped combustion chamber when the pistons are near top center locations during a compression stroke of the engine. At least one gaseous fuel injector communicates with the bore of the cylinder through an injector site in the cylinder between the intake port and the exhaust port. At least one liquid fuel injector communicates with the bore through an injector site in the cylinder.Type: GrantFiled: July 31, 2014Date of Patent: November 5, 2019Assignee: ACHATES POWER, INC.Inventors: Fabien G. Redon, Gerhard Regner, Rishikesh Venugopal
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Patent number: 10330006Abstract: A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.Type: GrantFiled: November 7, 2017Date of Patent: June 25, 2019Assignee: ACHATES POWER, INC.Inventor: Rishikesh Venugopal
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Patent number: 9995213Abstract: A combustion chamber for an opposed-piston engine has an elongated asymmetrical shape in longitudinal section that runs along a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The asymmetry apportions combustion chamber volume to provide additional clearance on a side of the chamber centerline toward which swirl is directed, thereby giving a fuel plume space to swing without hindrance in response to swirl.Type: GrantFiled: March 31, 2015Date of Patent: June 12, 2018Assignee: ACHATES POWER, INC.Inventors: Neerav Abani, Ryan G. MacKenzie, Rishikesh Venugopal
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Publication number: 20180058315Abstract: A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.Type: ApplicationFiled: November 7, 2017Publication date: March 1, 2018Applicant: ACHATES POWER, INC.Inventor: RISHIKESH VENUGOPAL
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Patent number: 9840965Abstract: A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.Type: GrantFiled: July 31, 2015Date of Patent: December 12, 2017Assignee: ACHATES POWER, INC.Inventor: Rishikesh Venugopal
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Publication number: 20170030262Abstract: A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.Type: ApplicationFiled: July 31, 2015Publication date: February 2, 2017Applicant: Achates Power, Inc.Inventor: Rishikesh Venugopal
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Publication number: 20160290224Abstract: A combustion chamber for an opposed-piston engine has an elongated asymmetrical shape in longitudinal section that runs along a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The asymmetry apportions combustion chamber volume to provide additional clearance on a side of the chamber centerline toward which swirl is directed, thereby giving a fuel plume space to swing without hindrance in response to swirl.Type: ApplicationFiled: March 31, 2015Publication date: October 6, 2016Applicant: ACHATES POWER, INC.Inventors: NEERAV ABANI, RYAN G. MACKENZIE, RISHIKESH VENUGOPAL
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Publication number: 20160195028Abstract: A compression-ignited, opposed-piston engine equipped for multi-fuel operation includes at least one cylinder, a pair of pistons slidably disposed in the cylinder for opposing movement between respective bottom and fop center locations, and spaced-apart intake and exhaust ports near respective ends of the cylinder. The pistons include end surfaces constructed to form a shaped combustion chamber when the pistons are near top center locations during a compression stroke of the engine. At least one gaseous fuel injector communicates with the bore of the cylinder through an injector site in the cylinder between the intake port and the exhaust port. At least one liquid fuel injector communicates with the bore through an injector site in the cylinder.Type: ApplicationFiled: July 31, 2014Publication date: July 7, 2016Applicant: ACHATES POWER, INC.Inventors: FABIEN G. REDON, GERHARD REGNER, RISHIKESH VENUGOPAL
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Patent number: 8833327Abstract: A piston and an engine are provided that includes various precise configuration parameters, including dimensions, shape and/or relative positioning of the combustion chamber features, resulting in a combustion process that yields improved mixing of fuel and intake air and increased uniformity of load on the engine pistons. The piston provides a piston bowl with a concave curvilinear portion that may be semi-spherical and extends inwardly to a depth; an angled surface extends inwardly from the crown surface to intersect the concave curvilinear portion at an edge at a depth; and a curved surface that extends inwardly from the crown surface to intersect the concave curvilinear portion at a tangent at a depth. The angled surface may be part of a frusto-conical surface that may extend from both sides of the angled surface to an area proximate the curved surface.Type: GrantFiled: December 28, 2011Date of Patent: September 16, 2014Assignee: Cummins Intellectual Property, Inc.Inventors: Rishikesh Venugopal, John M. Deur, Jason W. Mackey
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Patent number: 8677970Abstract: A piston and an engine are provided that includes various precise configuration parameters, including dimensions, shape and/or relative positioning of combustion chamber features. More particularly, configuration parameters for a piston crown and a piston bowl located within the piston crown are provided. The piston bowl configuration results in a combustion process that yields decreased heat transfer to a cylinder head of the internal combustion engine as well as reduced NOx emissions.Type: GrantFiled: March 16, 2012Date of Patent: March 25, 2014Assignee: Cummins Intellectual Property, Inc.Inventors: Rishikesh Venugopal, Donald W. Stanton, Bhargav Ranganath, Thomas Geyer
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Publication number: 20130167806Abstract: A piston and an engine are provided that includes various precise configuration parameters, including dimensions, shape and/or relative positioning of the combustion chamber features, resulting in a combustion process that yields improved mixing of fuel and intake air and increased uniformity of load on the engine pistons. The piston provides a piston bowl with a concave curvilinear portion that may be semi-spherical and extends inwardly to a depth; an angled surface extends inwardly from the crown surface to intersect the concave curvilinear portion at an edge at a depth; and a curved surface that extends inwardly from the crown surface to intersect the concave curvilinear portion at a tangent at a depth. The angled surface may be part of a frusto-conical surface that may extend from both sides of the angled surface to an area proximate the curved surface.Type: ApplicationFiled: December 28, 2011Publication date: July 4, 2013Applicant: CUMMINS INTELLECTUAL PROPERTY, INC.Inventors: Rishikesh VENUGOPAL, John M. DEUR, Jason W. MACKEY
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Publication number: 20120234285Abstract: A piston and an engine are provided that includes various precise configuration parameters, including dimensions, shape and/or relative positioning of combustion chamber features. More particularly, configuration parameters for a piston crown and a piston bowl located within the piston crown are provided. The piston bowl configuration results in a combustion process that yields decreased heat transfer to a cylinder head of the internal combustion engine as well as reduced NOx emissions.Type: ApplicationFiled: March 16, 2012Publication date: September 20, 2012Applicant: CUMMINS INTELLECTUAL PROPERTY, INC.Inventors: Rishikesh VENUGOPAL, Donald W. STANTON, Bhargav RANGANATH, Thomas GEYER
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Patent number: RE46806Abstract: A piston and an engine are provided that includes various precise configuration parameters, including dimensions, shape and/or relative positioning of combustion chamber features. More particularly, configuration parameters for a piston crown and a piston bowl located within the piston crown are provided. The piston bowl configuration results in a combustion process that yields decreased heat transfer to a cylinder head of the internal combustion engine as well as reduced NOx emissions.Type: GrantFiled: March 25, 2016Date of Patent: April 24, 2018Assignee: Cummins Intellectual Property, Inc.Inventors: Rishikesh Venugopal, Donald W. Stanton, Bhargav Ranganath, Thomas Bodin