Patents by Inventor Satheesh Makkapati
Satheesh Makkapati 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: 10975790Abstract: Systems and methods are provided for using an electric machine as a generator to control boost during an engine cold start. In one example, a method may include receiving a request to increase an engine load during the engine cold start, determining an available capacity of a battery, operating the electric machine as a generator to increase the engine load with an electrical load, and responsive to the available capacity of the battery being less than a charge threshold, charging the battery with the electrical load while generating an increased boost pressure with an electric boosting device by powering the electric boosting device via the battery, and coordinating an amount of the increased boost pressure to compensate the electrical load. By increasing the engine load during the engine cold start, an exhaust gas temperature may be increased to achieve catalyst light-off.Type: GrantFiled: August 26, 2019Date of Patent: April 13, 2021Assignee: Ford Global Technologies, LLCInventors: Eric Matthew Kurtz, Jason Brian Martz, Satheesh Makkapati
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Publication number: 20210062776Abstract: Systems and methods are provided for using an electric machine as a generator to control boost during an engine cold start. In one example, a method may include receiving a request to increase an engine load during the engine cold start, determining an available capacity of a battery, operating the electric machine as a generator to increase the engine load with an electrical load, and responsive to the available capacity of the battery being less than a charge threshold, charging the battery with the electrical load while generating an increased boost pressure with an electric boosting device by powering the electric boosting device via the battery, and coordinating an amount of the increased boost pressure to compensate the electrical load. By increasing the engine load during the engine cold start, an exhaust gas temperature may be increased to achieve catalyst light-off.Type: ApplicationFiled: August 26, 2019Publication date: March 4, 2021Inventors: Eric Matthew Kurtz, Jason Brian Martz, Satheesh Makkapati
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Patent number: 10641191Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.Type: GrantFiled: September 24, 2018Date of Patent: May 5, 2020Assignee: Ford Global Technologies, LLCInventors: Tao Zeng, Eric Warren Curtis, Satheesh Makkapati, Brad Alan Boyer, Joseph Norman Ulrey, David R. Hanna, Devesh Upadhyay
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Publication number: 20190063351Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.Type: ApplicationFiled: September 24, 2018Publication date: February 28, 2019Inventors: Tao Zeng, Eric Warren Curtis, Satheesh Makkapati, Brad Alan Boyer, Joseph Norman Ulrey, David R. Hanna, Devesh Upadhyay
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Patent number: 10145320Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.Type: GrantFiled: August 31, 2017Date of Patent: December 4, 2018Assignee: Ford Global Technologies, LLCInventors: Tao Zeng, Eric Warren Curtis, Satheesh Makkapati, Brad Alan Boyer, Joseph Norman Ulrey, David R. Hanna, Devesh Upadhyay
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Patent number: 9879620Abstract: Methods and systems are provided for reducing vacuum at an outlet of an upstream first compressor when powering on a second compressor positioned downstream of the first compressor. In one example, a method may comprise, in response to a desired engine torque increasing above a threshold: powering on a second compressor positioned downstream of a first compressor in an intake of an engine system, and opening a compressor recirculation valve (CRV) positioned in a bypass passage coupled across the first compressor for a duration. As such, a portion of intake gasses from upstream of the first compressor may be routed to the second compressor.Type: GrantFiled: November 10, 2015Date of Patent: January 30, 2018Assignee: Ford Global Technologies, LLCInventors: Satheesh Makkapati, Dushyant Karthikeyan, Julia Helen Buckland, Eric Warren Curtis
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Publication number: 20170130658Abstract: Methods and systems are provided for reducing vacuum at an outlet of an upstream first compressor when powering on a second compressor positioned downstream of the first compressor. In one example, a method may comprise, in response to a desired engine torque increasing above a threshold: powering on a second compressor positioned downstream of a first compressor in an intake of an engine system, and opening a compressor recirculation valve (CRV) positioned in a bypass passage coupled across the first compressor for a duration. As such, a portion of intake gasses from upstream of the first compressor may be routed to the second compressor.Type: ApplicationFiled: November 10, 2015Publication date: May 11, 2017Inventors: Satheesh Makkapati, Dushyant Karthikeyan, Julia Helen Buckland, Eric Warren Curtis
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Patent number: 9453481Abstract: A method for operating an engine is disclosed. In one example, internal EGR is increased during conditions where cooled EGR is at a higher concentration during a decreasing engine load so that homogeneous compression ignition may be initiated at lower engine loads.Type: GrantFiled: June 4, 2013Date of Patent: September 27, 2016Assignee: Ford Global Technologies, LLCInventors: Gopichandra Surnilla, Eric Warren Curtis, Daniel Joseph Styles, Satheesh Makkapati
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Patent number: 9366178Abstract: Methods and systems are provided for an engine including a first turbocharger having a first compressor and a second turbocharger having a second compressor. An EGR differential between the first compressor and the second compressor may be increased under a condensation condition, and decreased under a surge condition. The EGR differential may also be decreased when a compressor outlet temperature exceeds an outlet temperature threshold.Type: GrantFiled: March 10, 2014Date of Patent: June 14, 2016Assignee: Ford Global Technologies, LLCInventors: Daniel Joseph Styles, Brad Alan Boyer, Satheesh Makkapati
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Publication number: 20140352670Abstract: A method for operating an engine is disclosed. In one example, internal EGR is increased during conditions where cooled EGR is at a higher concentration during a decreasing engine load so that homogeneous compression ignition may be initiated at lower engine loads.Type: ApplicationFiled: June 4, 2013Publication date: December 4, 2014Inventors: Gopichandra Surnilla, Eric Warren Curtis, Daniel Joseph Styles, Satheesh Makkapati
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Publication number: 20140190160Abstract: Methods and systems are provided for an engine including a first turbocharger having a first compressor and a second turbocharger having a second compressor. An EGR differential between the first compressor and the second compressor may be increased under a condensation condition, and decreased under a surge condition. The EGR differential may also be decreased when a compressor outlet temperature exceeds an outlet temperature threshold.Type: ApplicationFiled: March 10, 2014Publication date: July 10, 2014Applicant: Ford Global Technologies, LLCInventors: Daniel Joseph Styles, Brad Alan Boyer, Satheesh Makkapati
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Patent number: 8726658Abstract: Methods and systems are provided for an engine including a first turbocharger having a first compressor and a second turbocharger having a second compressor. An EGR differential between the first compressor and the second compressor may be increased under a condensation condition, and decreased under a surge condition. The EGR differential may also be decreased when a compressor outlet temperature exceeds an outlet temperature threshold.Type: GrantFiled: July 22, 2011Date of Patent: May 20, 2014Assignee: Ford Global Technologies, LLCInventors: Daniel Joseph Styles, Brad Alan Boyer, Satheesh Makkapati
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Publication number: 20130019594Abstract: Methods and systems are provided for an engine including a first turbocharger having a first compressor and a second turbocharger having a second compressor. An EGR differential between the first compressor and the second compressor may be increased under a condensation condition, and decreased under a surge condition. The EGR differential may also be decreased when a compressor outlet temperature exceeds an outlet temperature threshold.Type: ApplicationFiled: July 22, 2011Publication date: January 24, 2013Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Daniel Joseph Styles, Brad Alan Boyer, Satheesh Makkapati
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Patent number: 6976456Abstract: An adjustable connecting rod system includes a reliable, rapidly responsive mechanism for varying effective connecting rod length to vary the compression ratio of the engine. The mechanism may employ the momentum of connecting rod components during operation of the engine to provide actuation force to vary connecting rod length. Connecting rod length is preferably controlled by manipulation of fluid-actuated locking members. In a preferred embodiment, hydraulic pressure is applied through the use of engine oil or other hydraulic fluids. The connecting rod preferably employs one or more movable compression members such as roller members or other mechanical components that may be shifted from one position to another with relatively little friction in order to vary the effective length of the connecting rod. The movable compression members may engage surfaces of both the crankpin bearing retainer and the connecting rod body, loaded in compression to transmit forces therebetween.Type: GrantFiled: June 26, 2003Date of Patent: December 20, 2005Assignee: Ford Global Technologies, LLCInventors: Yitzhak Isaac Henig, Jeffrey Eliot Chottiner, Jagadish Sorab, Pravin Sashidharan, Satheesh Makkapati
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Publication number: 20040261733Abstract: An adjustable connecting rod system includes a reliable, rapidly responsive mechanism for varying effective connecting rod length to vary the compression ratio of the engine. The mechanism may employ the momentum of connecting rod components during operation of the engine to provide actuation force to vary connecting rod length. Connecting rod length is preferably controlled by manipulation of fluid-actuated locking members. In a preferred embodiment, hydraulic pressure is applied through the use of engine oil or other hydraulic fluids. The connecting rod preferably employs one or more movable compression members such as roller members or other mechanical components that may be shifted from one position to another with relatively little friction in order to vary the effective length of the connecting rod. The movable compression members may engage surfaces of both the crankpin bearing retainer and the connecting rod body, loaded in compression to transmit forces therebetween.Type: ApplicationFiled: June 26, 2003Publication date: December 30, 2004Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Yitzhak Isaac Henig, Jeffrey Eliot Chottiner, Jagadish Sorab, Pravin Sashidharan, Satheesh Makkapati
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Patent number: 6314928Abstract: The lost motion arm 44 has first and second contact surfaces 102 and 104. A latch mechanism is connected on the body with an extendable plunger 120 having a first contact surface 124 and a second contact surface 126. The plunger 120 has a first position for first contact surface 124 engagement with the lost motion arm first contact surface 102 to prevent angular movement of the lost motion arm 44 with respect to the body 10 in a first angular direction. When angular movement in the first angular direction is prevented, the motion of the lost motion arm 44 imparted by the cam lobe 66 is transmitted to the body 10 to provide for a first state of operation of the valve stem 18. When the plunger 120 is in a second position, non-contacting with the lost motion arm 44, the lost motion arm 44 is allowed to pivot relative to the body 10. Accordingly, the rocker arm assembly 7 will be in a second state of total or partial deactivation of the valve stem 18.Type: GrantFiled: December 6, 2000Date of Patent: November 13, 2001Assignee: Ford Global Technologies, Inc.Inventors: Daniel James Baraszu, George Aristidis Papaioannou, Peter Renny George, Satheesh Makkapati, Steve Poe