Patents by Inventor Chandan Mahato
Chandan Mahato 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: 20230272765Abstract: An injector seal assembly including a nozzle combustion shield is disclosed, the thermally conductive component of the injector seal assembly defining at least one groove to allow fluid communication between the main combustion chamber and a gap defined by a fuel injector and the injector seal assembly to facilitate the prevention of corrosion of the components.Type: ApplicationFiled: May 8, 2023Publication date: August 31, 2023Inventors: Thomas O. Hahn, Terry L. Johnson, Aamir Ibrahim, Raheel Ahmed, Joseph A. Worthington, Chandan Mahato
-
Patent number: 11674486Abstract: An injector seal assembly including a nozzle combustion shield is disclosed, the thermally conductive component of the injector seal assembly defining at least one groove to allow fluid communication between the main combustion chamber and a gap defined by a fuel injector and the injector seal assembly to facilitate the prevention of corrosion of the components.Type: GrantFiled: December 2, 2020Date of Patent: June 13, 2023Assignee: Cummins Inc.Inventors: Thomas O. Hahn, Terry L. Johnson, Aamir Ibrahim, Raheel Ahmed, Joseph A. Worthington, Chandan Mahato
-
Publication number: 20230019002Abstract: An injector seal assembly including a nozzle combustion shield is disclosed, the thermally conductive component of the injector seal assembly defining at least one groove to allow fluid communication between the main combustion chamber and a gap defined by a fuel injector and the injector seal assembly to facilitate the prevention of corrosion of the components.Type: ApplicationFiled: December 2, 2020Publication date: January 19, 2023Inventors: Thomas O. Hahn, Terry L. Johnson, Aamir Ibrahim, Raheel Ahmed, Joseph A. Worthington, Chandan Mahato
-
Systems and methods for in-cylinder fuel dosing for exhaust aftertreatment system thermal management
Patent number: 11015540Abstract: An apparatus comprises a first circuit and a second circuit. The first circuit is structured to determine that a combustion cylinder is operating in a transition period between an exhaust stroke and an intake stroke of the combustion cylinder. The second circuit is structured to provide an injection command during the transition period to a fuel injector associated with the combustion cylinder, the injection command being to inject fuel into a combustion chamber of the combustion cylinder such that at least a portion of the fuel escapes from the combustion chamber through an exhaust port of the combustion cylinder.Type: GrantFiled: October 3, 2017Date of Patent: May 25, 2021Assignee: Cummins Inc.Inventors: Chandan Mahato, John L. Hoehne, E. Nathan Linen, Shounak Mishra, Boopathi S. Mahadevan, Foy C. Henderson -
SYSTEMS AND METHODS FOR IN-CYLINDER FUEL DOSING FOR EXHAUST AFTERTREATMENT SYSTEM THERMAL MANAGEMENT
Publication number: 20200049084Abstract: An apparatus comprises a first circuit and a second circuit. The first circuit is structured to determine that a combustion cylinder is operating in a transition period between an exhaust stroke and an intake stroke of the combustion cylinder. The second circuit is structured to provide an injection command during the transition period to a fuel injector associated with the combustion cylinder, the injection command being to inject fuel into a combustion chamber of the combustion cylinder such that at least a portion of the fuel escapes from the combustion chamber through an exhaust port of the combustion cylinder.Type: ApplicationFiled: October 3, 2017Publication date: February 13, 2020Applicant: Cummins Inc.Inventors: Chandan MAHATO, John L. HOEHNE, E. Nathan LINEN, Shounak MISHRA, Boopathi S. MAHADEVAN, Foy C. HENDERSON -
Patent number: 10533514Abstract: A method of controlling a fuel injector comprises measuring a pressure in a cylinder of an engine with a pressure sensor and determining at least one of a crank angle and a crank speed with a crank sensor. The method also comprises calculating a net indicated mean effective pressure of the cylinder from the measured value of the pressure sensor and the determined value of the crank sensor. Also, the method comprises adjusting a fueling parameter of a fuel injector for the cylinder in response to the difference between the calculated net indicated mean effective pressure and a reference mean effective pressure indicates a change in power of the engine. Alternatively, the method may adjust the fueling parameter based on a power feedback signal for the engine.Type: GrantFiled: June 2, 2017Date of Patent: January 14, 2020Assignee: Cummins Inc.Inventors: Phanindra V. Garimella, John L. Hoehne, Ian W. McGiffen, Chandan Mahato, Boopathi Singalandapuram Mahadevan, Pagalavan Mathari Bakthavatsalam, Travis Alva Anderson
-
Patent number: 10480441Abstract: A system and method for controlling a temperature of an exhaust gas at an inlet of a selective catalytic reduction system during at least certain low air density conditions. The system may detect an air density value upstream of an internal combustion engine of an engine system, such as, for example, at an inlet of a compressor. Using the detected air density, one of a plurality of relationships between an engine speed and an outputted engine power, as a function of the detected air density value, may be selected for use in determining what combination of engine speed(s) and/or engine power(s) will produce an exhaust gas that is within a target exhaust gas temperature. Using the selected relationship, at least one of the engine speed and the engine power may be adjusted to at least assist in attaining the target exhaust gas temperature.Type: GrantFiled: January 18, 2018Date of Patent: November 19, 2019Assignee: Cummins Inc.Inventors: John L. Hoehne, Ian W. McGiffen, Chandan Mahato, Paul Daniel Borisuk, Boopathi Singalandapuram Mahadevan
-
Patent number: 10428781Abstract: A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd.Type: GrantFiled: November 29, 2017Date of Patent: October 1, 2019Assignee: Cummins Inc.Inventors: Chandan Mahato, Frank Husmeier, Foy C. Henderson
-
Publication number: 20190226420Abstract: A method of controlling a fuel injector comprises measuring a pressure in a cylinder of an engine with a pressure sensor and determining at least one of a crank angle and a crank speed with a crank sensor. The method also comprises calculating a net indicated mean effective pressure of the cylinder from the measured value of the pressure sensor and the determined value of the crank sensor. Also, the method comprises adjusting a fueling parameter of a fuel injector for the cylinder in response to the difference between the calculated net indicated mean effective pressure and a reference mean effective pressure indicates a change in power of the engine. Alternatively, the method may adjust the fueling parameter based on a power feedback signal for the engine.Type: ApplicationFiled: June 2, 2017Publication date: July 25, 2019Inventors: Phanindra V. Garimella, John L. Hoehne, Ian W. McGiffen, Chandan Mahato, Boopathi Singalandapuram Mahadevan, Pagalavan Mathari Bakthavatsalam, Travis Alva Anderson
-
Publication number: 20180149105Abstract: A system and method for controlling a temperature of an exhaust gas at an inlet of a selective catalytic reduction system during at least certain low air density conditions. The system may detect an air density value upstream of an internal combustion engine of an engine system, such as, for example, at an inlet of a compressor. Using the detected air density, one of a plurality of relationships between an engine speed and an outputted engine power, as a function of the detected air density value, may be selected for use in determining what combination of engine speed(s) and/or engine power(s) will produce an exhaust gas that is within a target exhaust gas temperature. Using the selected relationship, at least one of the engine speed and the engine power may be adjusted to at least assist in attaining the target exhaust gas temperature.Type: ApplicationFiled: January 18, 2018Publication date: May 31, 2018Inventors: John L. Hoehne, Ian W. McGiffen, Chandan Mahato, Paul Daniel Borisuk, Boopathi Singalandapuram Mahadevan
-
Patent number: 9957939Abstract: A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd.Type: GrantFiled: October 1, 2015Date of Patent: May 1, 2018Assignee: Cummins Inc.Inventors: Chandan Mahato, Frank Husmeier, Foy C. Henderson
-
Publication number: 20180080422Abstract: A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd.Type: ApplicationFiled: November 29, 2017Publication date: March 22, 2018Applicant: CUMMINS INC.Inventors: Chandan Mahato, Frank Husmeier, Foy C. Henderson
-
Publication number: 20170218909Abstract: A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd.Type: ApplicationFiled: October 1, 2015Publication date: August 3, 2017Inventors: Chandan Mahato, Frank Husmeier, Foy C. Henderson
-
Patent number: 9587567Abstract: Various embodiments relate to a method of operating an engine system with injectors having nozzle sac volume. The engine system may be a four-stroke, high power engine having a high-pressure common-rail injection system. A number of engine cylinders to fire is selected based on a fuel injection quantity per selected engine cylinder such that a nitrogen oxides (NOx) emission is less than a first predetermined threshold and a smoke value is less than a second predetermined threshold. The fuel injection quantity per cylinder may be higher than a nominal fuel injection quantity to improve fuel injector spray characteristics. The exhaust can be mixed with fresh air blowout from deactivated cylinders to further reduce smoke value. The engine system is operated with a firing pattern for the selected number of cylinders to fire.Type: GrantFiled: June 30, 2014Date of Patent: March 7, 2017Assignee: CUMMINS INC.Inventors: Boopathi Singalandapuram Mahadevan, Chandan Mahato, John L. Hoehne, Ian W. McGiffen
-
Publication number: 20150377171Abstract: Various embodiments relate to a method of operating an engine system with injectors having nozzle sac volume. The engine system may be a four-stroke, high power engine having a high-pressure common-rail injection system. A number of engine cylinders to fire is selected based on a fuel injection quantity per selected engine cylinder such that a nitrogen oxides (NOx) emission is less than a first predetermined threshold and a smoke value is less than a second predetermined threshold. The fuel injection quantity per cylinder may be higher than a nominal fuel injection quantity to improve fuel injector spray characteristics. The exhaust can be mixed with fresh air blowout from deactivated cylinders to further reduce smoke value. The engine system is operated with a firing pattern for the selected number of cylinders to fire.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Boopathi Singalandapuram Mahadevan, Chandan Mahato, John L. Hoehne, Ian W. McGiffen
-
Publication number: 20100139615Abstract: A direct injection flathead engine comprising an internal combustion cylinder block with at least one fuel injector positioned substantially transverse to the cylinder axis. The engine also comprises at least one exhaust valve positioned substantially near the at least one fuel injector, where the exhaust valve is on the same side of the piston as the fuel injector. In one aspect, a fuel injector is positioned substantially transverse to the cylinder axis, whereby a substantial portion of the fuel may be sprayed on top of the hot exhaust valve and deflected towards the spark plug, thus forming a stratified charge around the spark plug.Type: ApplicationFiled: February 13, 2008Publication date: June 10, 2010Inventors: Chandan Mahato, Paulius V. Puzinauskas, Kenneth C. Midkiff