Patents by Inventor Judhajit Roy
Judhajit Roy 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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Publication number: 20240326652Abstract: A method includes determining a first probable amount of aggregate heat generated by a vehicle battery over a time interval, for each of a plurality of possible travelable paths to possible destinations, achievable within the time interval. The method also includes determining a second probable amount of aggregate heat generated by the battery over another time interval for each of a plurality of second possible travelable paths to possible second destinations from the possible first destinations. The method includes determining a maximum probable amount of aggregate heat generated over the first and second time intervals, and, responsive to the maximum amount of aggregate heat generated over the second time interval exceeding predefined cooling capacity and responsive to the maximum amount of aggregate heat generated over the first time interval being less than the predefined cooling capacity, scheduling precooling of the battery during the first time interval.Type: ApplicationFiled: March 28, 2023Publication date: October 3, 2024Inventors: Qiuhao HU, Ashley Peter WIESE, Julia Helen BUCKLAND SEEDS, Eduardo PEREZ GUZMAN, Erik BIBERSTEIN, Judhajit ROY, Yanan ZHAO
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Systems and methods to coordinate clunk and shuffle management with engine starts in MHT drivetrains
Patent number: 12030480Abstract: Systems and methods for starting an internal combustion engine of a hybrid vehicle are presented. In one example, the internal combustion is started via closing a driveline disconnect clutch and limiting a torque output rate of an electric machine so that vehicle speed may increase continuously without decreasing during engine cranking and run-up periods.Type: GrantFiled: July 13, 2022Date of Patent: July 9, 2024Assignee: Ford Global Technologies, LLCInventors: Maruthi Ravichandran, Judhajit Roy, Jason Meyer, Sassan Farahmand, Mary Catherine Farmer, Fazal Syed -
Patent number: 12017637Abstract: A vehicle includes an engine; an electric machine; a transceiver, programmed to communicate with a server; and a controller, programmed to responsive to identifying a route, obtain road data associated with the route via the transceiver, wherein the road data include locations of stop signs and traffic lights, and identify a sign classification using a sign and traffic light density calculated using a total number of stop signs and traffic lights within a lookahead distance on the route, identify a road type classification using the sign classification, responsive to determining the sign and traffic light density within the lookahead distance is above a threshold indicative of a city road type classification, adjust a drivetrain of the vehicle to reduce engine operation and increasingly propel the vehicle via the electric machine.Type: GrantFiled: November 16, 2021Date of Patent: June 25, 2024Assignee: Ford Global Technologies, LLCInventors: Judhajit Roy, Chenliu Stephen Lu, W. Cary Cole, Jared King, Kyle Yeakle
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Patent number: 11979847Abstract: Handshaking is performed, by an ego device via a wireless transceiver, with surrounding mobile devices to receive identifiers of the surrounding mobile devices and incoming notification messages from the surrounding mobile devices. Each of the incoming notification messages are sent from a different respective sender device of the surrounding mobile devices and include identifiers of devices seen by the sender device and an indication of whether issues with the devices seen by the sender device were identified by the sender device. An alert is raised responsive to an issue being indicated with the ego device based on the incoming notification messages.Type: GrantFiled: October 4, 2021Date of Patent: May 7, 2024Assignee: FORD GLOBAL TECHNOLOGIES, LLCInventors: Chenliu Stephen Lu, Judhajit Roy, Jonathan Barker, W. Cary Cole, Jared King, Kyle Yeakle
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SYSTEMS AND METHODS TO COORDINATE CLUNK AND SHUFFLE MANAGEMENT WITH ENGINE STARTS IN MHT DRIVETRAINS
Publication number: 20230242090Abstract: Systems and methods for starting an internal combustion engine of a hybrid vehicle are presented. In one example, the internal combustion is started via closing a driveline disconnect clutch and limiting a torque output rate of an electric machine so that vehicle speed may increase continuously without decreasing during engine cranking and run-up periods.Type: ApplicationFiled: July 13, 2022Publication date: August 3, 2023Inventors: Maruthi Ravichandran, Judhajit Roy, Jason Meyer, Sassan Farahmand, Mary Catherine Farmer, Fazal Syed -
Patent number: 11708007Abstract: A hybrid vehicle includes an engine, an electric machine, a traction battery electrically connected to the electric machine, and a controller. The controller is programmed to, in response to the vehicle approaching a decline, overrepresent a state of charge (SOC) of the traction battery to cause a torque command to the engine to decrease and a torque command to the electric machine to increase such that discharge of the traction battery increases in advance of the decline.Type: GrantFiled: August 2, 2021Date of Patent: July 25, 2023Assignee: Ford Global Technologies, LLCInventors: Kyle Yeakle, Alec Bolthouse, Judhajit Roy, Jonathan Barker, Jared King
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Publication number: 20230150478Abstract: A vehicle includes an engine; an electric machine; a transceiver, programmed to communicate with a server; and a controller, programmed to responsive to identifying a route, obtain road data associated with the route via the transceiver, wherein the road data include locations of stop signs and traffic lights, and identify a sign classification using a sign and traffic light density calculated using a total number of stop signs and traffic lights within a lookahead distance on the route, identify a road type classification using the sign classification, responsive to determining the sign and traffic light density within the lookahead distance is above a threshold indicative of a city road type classification, adjust a drivetrain of the vehicle to reduce engine operation and increasingly propel the vehicle via the electric machine.Type: ApplicationFiled: November 16, 2021Publication date: May 18, 2023Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Judhajit ROY, Chenliu Stephen LU, W. Cary COLE, Jared KING, Kyle YEAKLE
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Patent number: 11643081Abstract: Systems and control methods can provide for determining a TrnAin torque request from desired vehicle acceleration in a vehicle that utilizes a WTC architecture to allow for smooth transition between different transmission states, such as torque converter bypass clutch states and shifts between transmission gear ratios. The methods provide consistent and smooth vehicle acceleration profile during transmission state transitions. The methods also provide the ability to track the desired vehicle acceleration consistently from virtual driver demand sources, such as adaptive cruise control, autonomous vehicle, or remote parking, without allocating any additional resource to account for transmission state transitions. The proposed methods are applicable to any TC-based automatic transmission drivetrain, such as conventional powertrain, MHT, P4 HEV, or even BEV powertrains where the motor is located on the impeller side of a torque converter.Type: GrantFiled: March 23, 2021Date of Patent: May 9, 2023Assignee: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Judhajit Roy, Jason Meyer, Rajit Johri
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Patent number: 11628817Abstract: A vehicle includes a drive wheel, an engine, an accelerator pedal, a torque converter, a clutch, and a controller. The drive wheel is configured to propel the vehicle. The engine is configured to generate power and to deliver power to the drive wheel to accelerate the vehicle. The accelerator pedal is configured to generate an acceleration request based on a pedal position. The torque converter is disposed between the engine and the drive wheel. The clutch is disposed between the engine and the drive wheel and is configured to bypass the torque converter. The controller is programmed to, in response to depressing the accelerator pedal to a position that corresponds with accelerating the vehicle at a desired magnitude, adjust the torque of the engine to accelerate the vehicle at the desired magnitude, regardless of the state of the clutch.Type: GrantFiled: May 18, 2020Date of Patent: April 18, 2023Assignee: Ford Global Technologies, LLCInventors: Judhajit Roy, Maruthi Thiruninravur Ravichandran, Jason Meyer, Rajit Johri, Jeffrey Allen Doering, Yanan Zhao
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Patent number: 11628818Abstract: A method and system for operating a vehicle that includes an automatic transmission with a torque converter clutch is described. In one example, the method includes predicting a time that the torque converter clutch will open so that stopping rotation of the engine may be requested before the torque converter clutch is opened. The stopping rotation of the engine is requested to conserve fuel.Type: GrantFiled: July 7, 2020Date of Patent: April 18, 2023Assignee: Ford Global Technologies, LLCInventors: Yanan Zhao, Christopher John Teslak, Stuart N. Ford, Ralph Wayne Cunningham, Judhajit Roy, Chenliu Stephen Lu, Girish Gokul Chennupalli
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Publication number: 20230107920Abstract: Handshaking is performed, by an ego device via a wireless transceiver, with surrounding mobile devices to receive identifiers of the surrounding mobile devices and incoming notification messages from the surrounding mobile devices. Each of the incoming notification messages are sent from a different respective sender device of the surrounding mobile devices and include identifiers of devices seen by the sender device and an indication of whether issues with the devices seen by the sender device were identified by the sender device. An alert is raised responsive to an issue being indicated with the ego device based on the incoming notification messages.Type: ApplicationFiled: October 4, 2021Publication date: April 6, 2023Inventors: Chenliu Stephen LU, Judhajit ROY, Jonathan BARKER, W. Cary COLE, Jared KING, Kyle YEAKLE
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Publication number: 20230031294Abstract: A hybrid vehicle includes an engine, an electric machine, a traction battery electrically connected to the electric machine, and a controller. The controller is programmed to, in response to the vehicle approaching a decline, overrepresent a state of charge (SOC) of the traction battery to cause a torque command to the engine to decrease and a torque command to the electric machine to increase such that discharge of the traction battery increases in advance of the decline.Type: ApplicationFiled: August 2, 2021Publication date: February 2, 2023Inventors: Kyle Yeakle, Alec Bolthouse, Judhajit Roy, Jonathan Barker, Jared King
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Patent number: 11480145Abstract: Systems and methods for starting an engine that may be started via an electric machine and a driveline disconnect clutch are described. In one example, the method estimates a maximum motor propulsive torque during engine starting. The maximum motor propulsive torque may be based on an estimated speed that a torque converter impeller speed will be when an engine cranking period ends.Type: GrantFiled: September 28, 2021Date of Patent: October 25, 2022Assignee: Ford Global Technologies, LLCInventors: Judhajit Roy, Jason Meyer, Maruthi Ravichandran, Fazal Syed, Sassan Farahmand
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Publication number: 20220306107Abstract: Systems and control methods can provide for determining a TrnAin torque request from desired vehicle acceleration in a vehicle that utilizes a WTC architecture to allow for smooth transition between different transmission states, such as torque converter bypass clutch states and shifts between transmission gear ratios. The methods provide consistent and smooth vehicle acceleration profile during transmission state transitions. The methods also provide the ability to track the desired vehicle acceleration consistently from virtual driver demand sources, such as adaptive cruise control, autonomous vehicle, or remote parking, without allocating any additional resource to account for transmission state transitions. The proposed methods are applicable to any TC-based automatic transmission drivetrain, such as conventional powertrain, MHT, P4 HEV, or even BEV powertrains where the motor is located on the impeller side of a torque converter.Type: ApplicationFiled: March 23, 2021Publication date: September 29, 2022Applicant: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Judhajit Roy, Jason Meyer, Rajit Johri
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Patent number: 11339740Abstract: Systems and methods for operating an engine that may selectively enter and exit a fuel cut-off mode are described. In one example, the method holds the engine in the fuel cut-off mode even though a propulsive effort pedal is applied. An electric machine may provide torque to a vehicle driveline while the engine is in the fuel cut-off mode.Type: GrantFiled: February 4, 2021Date of Patent: May 24, 2022Assignee: Ford Global Technologies, LLCInventors: Yanan Zhao, Judhajit Roy, Christopher John Teslak, Ralph Wayne Cunningham, Rajit Johri, Mark Steven Yamazaki
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Patent number: 11230279Abstract: Methods and systems are provided for adjusting driver demand wheel torque of a vehicle. The driver demand wheel torque may be adjusted as a function of accelerator pedal position. In particular, at low accelerator pedal positions, a lead-in region of an accelerator pedal position to driver demand wheel torque relationship is adjustable responsive to vehicle operation conditions so that “dead pedal” feel may be avoided.Type: GrantFiled: February 11, 2020Date of Patent: January 25, 2022Assignee: Ford Global Technologies, LLCInventors: Yanan Zhao, Jason Meyer, Roy S. Schafer, Judhajit Roy
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Publication number: 20220009473Abstract: A method and system for operating a vehicle that includes an automatic transmission with a torque converter clutch is described. In one example, the method includes predicting a time that the torque converter clutch will open so that stopping rotation of the engine may be requested before the torque converter clutch is opened. The stopping rotation of the engine is requested to conserve fuel.Type: ApplicationFiled: July 7, 2020Publication date: January 13, 2022Inventors: Yanan Zhao, Christopher John Teslak, Stuart N. Ford, Ralph Wayne Cunningham, Judhajit Roy, Chenliu Stephen Lu, Girish Gokul Chennupalli
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Publication number: 20210354681Abstract: A vehicle includes a drive wheel, an engine, an accelerator pedal, a torque converter, a clutch, and a controller. The drive wheel is configured to propel the vehicle. The engine is configured to generate power and to deliver power to the drive wheel to accelerate the vehicle. The accelerator pedal is configured to generate an acceleration request based on a pedal position. The torque converter is disposed between the engine and the drive wheel. The clutch is disposed between the engine and the drive wheel and is configured to bypass the torque converter. The controller is programmed to, in response to depressing the accelerator pedal to a position that corresponds with accelerating the vehicle at a desired magnitude, adjust the torque of the engine to accelerate the vehicle at the desired magnitude, regardless of the state of the clutch.Type: ApplicationFiled: May 18, 2020Publication date: November 18, 2021Inventors: Judhajit Roy, Maruthi Thiruninravur Ravichandran, Jason Meyer, Rajit Johri, Jeffrey Allen Doering, Yanan Zhao
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Patent number: 11097721Abstract: A method and system for operating a vehicle that includes an electric machine and an internal combustion engine is described. In one example, the method includes arbitrating between providing torque compensation to a driveline via an internal combustion engine or via an electric machine to improve transmission gear shifting. The method may consider a plurality of vehicle operating conditions to aid the arbitration.Type: GrantFiled: March 31, 2020Date of Patent: August 24, 2021Assignee: Ford Global Technologies, LLCInventors: Yanan Zhao, Rajit Johri, Judhajit Roy, Christopher John Teslak
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Publication number: 20210245727Abstract: Methods and systems are provided for adjusting driver demand wheel torque of a vehicle. The driver demand wheel torque may be adjusted as a function of accelerator pedal position. In particular, at low accelerator pedal positions, a lead-in region of an accelerator pedal position to driver demand wheel torque relationship is adjustable responsive to vehicle operation conditions so that “dead pedal” feel may be avoided.Type: ApplicationFiled: February 11, 2020Publication date: August 12, 2021Inventors: Yanan Zhao, Jason Meyer, Roy S. Schafer, Judhajit Roy