Patents by Inventor James Harris Mutti
James Harris Mutti 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: 11668255Abstract: An engine braking system includes engine braking actuators for adjusting exhaust valve timings to engine braking timings in a cylinder-number braking mode. The system further includes an engine braking controller coupled to a control switch that produces a request indicating a requested cylinder-number braking mode. The engine braking controller is structured to transition exhaust valves to the engine braking timings, determine a control term to adjust intake air pressure for varying a braking power of the engine, and to adjust geometry of an exhaust turbine based on the control term. An adjusted speed of a compressor rotated by the exhaust turbine provides a change to intake air pressure that adjusts the braking power of the engine. Different levels of braking power are provided within different cylinder-number braking modes.Type: GrantFiled: December 9, 2020Date of Patent: June 6, 2023Assignee: Caterpillar Inc.Inventors: Rajesh Narayanan Nair, Samuel Were, James Harris Mutti, Behnaz Ensan, James Vernon Dornberger, II, Rodney L. Menold, Timothy David Schwartz, Kevin Walsh
-
Patent number: 11365697Abstract: A controller may determine that a regeneration process associated with an engine of a machine is active. The controller may obtain, based on determining that the regeneration process is active, information concerning a speed of the engine, information concerning a load of the engine, and information concerning a fuel rate of the engine. The controller may select, based on the information concerning the speed of the engine, the information concerning the load of the engine, and the information concerning the fuel rate of the engine, a control process, of a plurality of control processes, to control an intake manifold absolute pressure (IMAP) of the engine to facilitate the regeneration process. The controller may cause, according to the selected control process, adjustment of one or more components of a variable geometry turbocharger (VGT) of the engine and an intake throttle valve (ITV) of the engine.Type: GrantFiled: October 15, 2020Date of Patent: June 21, 2022Assignee: Caterpillar Inc.Inventors: Rajesh N. Nair, Samuel Were, James Harris Mutti
-
Publication number: 20220178315Abstract: An engine braking system includes engine braking actuators for adjusting exhaust valve timings to engine braking timings in a cylinder-number braking mode. The system further includes an engine braking controller coupled to a control switch that produces a request indicating a requested cylinder-number braking mode. The engine braking controller is structured to transition exhaust valves to the engine braking timings, determine a control term to adjust intake air pressure for varying a braking power of the engine, and to adjust geometry of an exhaust turbine based on the control term. An adjusted speed of a compressor rotated by the exhaust turbine provides a change to intake air pressure that adjusts the braking power of the engine. Different levels of braking power are provided within different cylinder-number braking modes.Type: ApplicationFiled: December 9, 2020Publication date: June 9, 2022Applicant: Caterpillar Inc.Inventors: Rajesh Narayanan Nair, Samuel Were, James Harris Mutti, Behnaz Ensan, James Vernon Dornberger, II, Rodney L. Menold, Timothy David Schwartz, Kevin Walsh
-
Publication number: 20220120232Abstract: A controller may determine that a regeneration process associated with an engine of a machine is active. The controller may obtain, based on determining that the regeneration process is active, information concerning a speed of the engine, information concerning a load of the engine, and information concerning a fuel rate of the engine. The controller may select, based on the information concerning the speed of the engine, the information concerning the load of the engine, and the information concerning the fuel rate of the engine, a control process, of a plurality of control processes, to control an intake manifold absolute pressure (IMAP) of the engine to facilitate the regeneration process. The controller may cause, according to the selected control process, adjustment of one or more components of a variable geometry turbocharger (VGT) of the engine and an intake throttle valve (ITV) of the engine.Type: ApplicationFiled: October 15, 2020Publication date: April 21, 2022Applicant: Caterpillar Inc.Inventors: Rajesh N. NAIR, Samuel WERE, James Harris MUTTI
-
Publication number: 20210324780Abstract: An exhaust system includes an exhaust pressure sensing system having sensor conduits structured to fluidly connect to an exhaust conduit in an exhaust system and feed exhaust to a differential pressure sensor. The differential pressure sensor produces a pressure signal indicative of a pressure drop across an exhaust aftertreatment element such as an exhaust filter. A plugging-mitigation conduit provides an always-open leakage path to convey condensate in a stream of leaked exhaust between the sensor conduits to prevent formation of deposits that can impact pressure sensing accuracy.Type: ApplicationFiled: April 21, 2020Publication date: October 21, 2021Applicant: Caterpillar Inc.Inventors: Kevin Lloyd Dea, James Harris Mutti, Thomas Reilly Fenelon
-
Patent number: 11131224Abstract: An exhaust system includes an exhaust pressure sensing system having sensor conduits structured to fluidly connect to an exhaust conduit in an exhaust system and feed exhaust to a differential pressure sensor. The differential pressure sensor produces a pressure signal indicative of a pressure drop across an exhaust aftertreatment element such as an exhaust filter. A plugging-mitigation conduit provides an always-open leakage path to convey condensate in a stream of leaked exhaust between the sensor conduits to prevent formation of deposits that can impact pressure sensing accuracy.Type: GrantFiled: April 21, 2020Date of Patent: September 28, 2021Assignee: Caterpillar Inc.Inventors: Kevin Lloyd Dea, James Harris Mutti, Thomas Reilly Fenelon
-
Patent number: 9670818Abstract: A reductant dosing system is disclosed as having a pump, and suction, discharge, and return passages. The system may also have a return valve, an air passage, and an air valve. The system may additionally have an air passage pressure sensor, a discharge passage pressure sensor, and a controller. The controller may be configured to calculate a first average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is closed; and calculate a second average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is open. The controller may also be configured to determine a pressure drop inside the discharge passage based on the first and second average pressures, and to determine that priming is successful based on the pressure drop and pressures of the discharge and air passages.Type: GrantFiled: August 7, 2015Date of Patent: June 6, 2017Assignee: Caterpillar Inc.Inventors: James Harris Mutti, Jr., Shivsinh Hitendrasinh Parmar, Satya Ramakrishna Manda Venkata Naga, Purna Chander Nalla
-
Publication number: 20170037763Abstract: A reductant dosing system is disclosed as having a pump, and suction, discharge, and return passages. The system may also have a return valve, an air passage, and an air valve. The system may additionally have an air passage pressure sensor, a discharge passage pressure sensor, and a controller. The controller may be configured to calculate a first average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is closed; and calculate a second average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is open. The controller may also be configured to determine a pressure drop inside the discharge passage based on the first and second average pressures, and to determine that priming is successful based on the pressure drop and pressures of the discharge and air passages.Type: ApplicationFiled: August 7, 2015Publication date: February 9, 2017Applicant: CATERPILLAR INC.Inventors: James Harris MUTTI, JR., Shivsinh Hitendrasinh PARMAR, Satya Ramakrishna MANDA VENKATA NAGA, Purna Chander NALLA
-
Publication number: 20160201535Abstract: A method is provided for calibrating an after-treatment system retrofitted onto an engine, the after-treatment system including a Selective Catalytic Reduction (SCR) device therein. The method is implemented using a controller having a memory pre-fed with an Engine-out NOx map, a SCR conversion map, a maximum SCR capability map, and a NOx dosing map corresponding to bench-run conditions for the given engine and the after-treatment system configurations. The method includes updating the Engine-out NOx map, the SCR conversion map, the maximum SCR capability map, and the NOx dosing map by the controller on the basis of actual sensed parameters of an exhaust stream associated with operation of the given engine and after-treatment system. The method further includes directing the controller to vary a feed-forward reductant dosing quantity at the SCR device during a subsequent operation of the engine based on the updated NOx dosing map stored at the controller.Type: ApplicationFiled: March 21, 2016Publication date: July 14, 2016Applicant: Caterpillar Inc.Inventors: Shikha Pokharel, James Harris Mutti, JR., Matthew Jay Segebart
-
Patent number: 7908858Abstract: A turbocharger control system is disclosed. The control system may have an engine and a fuel system configured to regulate fuel flow into the engine. The control system may further have an air induction system configured to regulate air flow into the engine and a sensor situated to sense a speed value of the air induction system. The controller may also have a controller configured to receive the speed value and regulate fuel flow into the engine as a function of the speed value.Type: GrantFiled: July 31, 2007Date of Patent: March 22, 2011Assignee: Caterpillar Inc.Inventors: Christopher Ronald Gehrke, James Harris Mutti, Jr.
-
Patent number: 7802427Abstract: An engine system is disclosed that monitors for boost leak. The system has an engine, a compressor located upstream of the engine, at least one auxiliary flow device located downstream of the engine, and a computing system operable to determine an estimated value corresponding to a flow of fluid through the compressor. The estimated value takes into account a flow of fluid from the compressor toward the at least one auxiliary flow device distinct from a flow from the compressor toward the engine.Type: GrantFiled: May 19, 2006Date of Patent: September 28, 2010Assignee: Caterpillar IncInventors: Christopher Ronald Gehrke, Michael Paul Withrow, James Harris Mutti, Jr.
-
Publication number: 20090133399Abstract: A turbocharger system for use with an engine having a braking mode of operation is disclosed. The turbocharger system may have a turbocharger with variable geometry, and a sensor situated to generate a signal indicative of a turbocharger speed. The turbocharger system may also have a controller in communication with the turbocharger and the sensor. The controller may be configured to vary the geometry of the turbocharger during the engine's braking mode of operation to increase a backpressure of the engine. The controller may also be configured to vary the geometry of the turbocharger to reduce the backpressure when the signal indicates a speed of the turbocharger within an amount of a desired speed.Type: ApplicationFiled: November 27, 2007Publication date: May 28, 2009Inventors: Joshua David Keyes, Jennifer Lynn Wilson, James Harris Mutti, Stephen Michael Wiley
-
Publication number: 20090031723Abstract: A turbocharger control system is disclosed. The control system may have an engine and a fuel system configured to regulate fuel flow into the engine. The control system may further have an air induction system configured to regulate air flow into the engine and a sensor situated to sense a speed value of the air induction system. The controller may also have a controller configured to receive the speed value and regulate fuel flow into the engine as a function of the speed value.Type: ApplicationFiled: July 31, 2007Publication date: February 5, 2009Inventors: Christopher Ronald Gehrke, James Harris Mutti, JR.
-
Publication number: 20070266706Abstract: An engine system is disclosed that monitors for boost leak. The system has an engine, a compressor located upstream of the engine, at least one auxiliary flow device located downstream of the engine, and a computing system operable to determine an estimated value corresponding to a flow of fluid through the compressor. The estimated value takes into account a flow of fluid from the compressor toward the at least one auxiliary flow device distinct from a flow from the compressor toward the engine.Type: ApplicationFiled: May 19, 2006Publication date: November 22, 2007Inventors: Christopher Ronald Gehrke, Michael Paul Withrow, James Harris Mutti