Patents by Inventor Maruthi Thiruninravur RAVICHANDRAN
Maruthi Thiruninravur RAVICHANDRAN 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: 11845420Abstract: A vehicle operating method comprising generating a base torque reserve for an engine based on a position of an accelerator pedal and a position rate of change of the accelerator pedal, where the base torque reserve is an air reserve of the engine generated by the engine. The base torque reserve may further be generated based on one or more of a drive mode, a vehicle altitude, a battery state of charge (SOC), and a transmission gear, in at least one example.Type: GrantFiled: December 6, 2019Date of Patent: December 19, 2023Assignee: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Jason Meyer, Bhavesh Ravindra Paradkar, Rajit Johri, Jeffrey Allen Doering
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Publication number: 20230391309Abstract: Systems and methods for starting an engine of a hybrid vehicle are described. In one example, the method starts an engine according to vehicle conditions that are within a range that is defined by one or more thresholds. The thresholds may be adjusted based on a history of individual driving patterns.Type: ApplicationFiled: August 16, 2023Publication date: December 7, 2023Inventors: Maruthi Thiruninravur Ravichandran, Marin Assaliyski, Akshay Bichkar, Karthik Pillutla, Rajit Johri
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Patent number: 11772627Abstract: Systems and methods for starting an engine of a hybrid vehicle are described. In one example, the method starts an engine according to vehicle conditions that are within a range that is defined by one or more thresholds. The thresholds may be adjusted based on a history of individual driving patterns.Type: GrantFiled: December 9, 2021Date of Patent: October 3, 2023Assignee: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Marin Assaliyski, Akshay Bichkar, Karthik Pillutla, Rajit Johri
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Publication number: 20230182711Abstract: Systems and methods for starting an engine of a hybrid vehicle are described. In one example, the method starts an engine according to vehicle conditions that are within a range that is defined by one or more thresholds. The thresholds may be adjusted based on a history of individual driving patterns.Type: ApplicationFiled: December 9, 2021Publication date: June 15, 2023Inventors: Maruthi Thiruninravur Ravichandran, Marin Assaliyski, Akshay Bichkar, Karthik Pillutla, Rajit Johri
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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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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: 11427087Abstract: A vehicle propulsion system configured to generate wheel torque includes an engine arranged to output a first propulsion torque to a transmission and an electric motor arranged to output a second propulsion torque downstream of the transmission. The vehicle propulsion system also includes a controller programmed to, in response to detecting a lash crossing associated with one of the electric motor and the transmission, set a torque slew rate of the other one of the electric motor and transmission such that each of the electric motor and transmission undergoes lash crossings at different points in time.Type: GrantFiled: February 25, 2019Date of Patent: August 30, 2022Assignee: Ford Global Technologies, LLCInventors: Jason Meyer, Jeffrey Allen Doering, Maruthi Thiruninravur Ravichandran
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Patent number: 11268582Abstract: A vehicle includes controller programmed to receive a driver-demanded wheel torque command and calculate a shaped wheel torque command based on the driver-demanded wheel torque command. The controller is further programmed to, in response to the driver-demanded wheel torque command changing from a first magnitude that is greater than an estimated wheel torque at a last time step to a second magnitude that is less than the estimated wheel torque at a current time step, set the shaped wheel torque to a minimum of a magnitude of the shaped wheel torque at the last time step and an estimated wheel torque at the current time step. The controller is also programmed to command the first and second actuators to produce the shaped wheel torque.Type: GrantFiled: January 13, 2020Date of Patent: March 8, 2022Assignee: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Jason Meyer, Rajit Johri, Jeffrey Allen Doering
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Patent number: 11220177Abstract: A vehicle includes an actuator, a drivetrain configured to receive mechanical power from the actuator, an accelerator pedal position sensor configured to output a driver-demanded torque, and a controller in electric communication with the sensor and the actuator. The controller is programmed to receive the driver-demanded torque and output a shaped torque command to mitigate driveline disturbances caused by backlash and shaft compliance.Type: GrantFiled: July 25, 2019Date of Patent: January 11, 2022Assignee: Ford Global Technologies, LLCInventors: Maruthi Thiruninravur Ravichandran, Jeffrey Allen Doering, Rajit Johri, Bhavesh Ravindra Paradkar, Dushyant K. Palejiya, Jason Meyer
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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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Publication number: 20210215211Abstract: A vehicle includes controller programmed to receive a driver-demanded wheel torque command and calculate a shaped wheel torque command based on the driver-demanded wheel torque command. The controller is further programmed to, in response to the driver-demanded wheel torque command changing from a first magnitude that is greater than an estimated wheel torque at a last time step to a second magnitude that is less than the estimated wheel torque at a current time step, set the shaped wheel torque to a minimum of a magnitude of the shaped wheel torque at the last time step and an estimated wheel torque at the current time step. The controller is also programmed to command the first and second actuators to produce the shaped wheel torque.Type: ApplicationFiled: January 13, 2020Publication date: July 15, 2021Inventors: Maruthi Thiruninravur Ravichandran, Jason Meyer, Rajit Johri, Jeffrey Allen Doering
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Publication number: 20210171012Abstract: A vehicle operating method comprising generating a base torque reserve for an engine based on a position of an accelerator pedal and a position rate of change of the accelerator pedal, where the base torque reserve is an air reserve of the engine generated by the engine. The base torque reserve may further be generated based on one or more of a drive mode, a vehicle altitude, a battery state of charge (SOC), and a transmission gear, in at least one example.Type: ApplicationFiled: December 6, 2019Publication date: June 10, 2021Inventors: Maruthi Thiruninravur Ravichandran, Jason Meyer, Bhavesh Ravindra Paradkar, Rajit Johri, Jeffrey Allen Doering
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Publication number: 20210023944Abstract: A vehicle includes an actuator, a drivetrain configured to receive mechanical power from the actuator, an accelerator pedal position sensor configured to output a driver-demanded torque, and a controller in electric communication with the sensor and the actuator. The controller is programmed to receive the driver-demanded torque and output a shaped torque command to mitigate driveline disturbances caused by backlash and shaft compliance.Type: ApplicationFiled: July 25, 2019Publication date: January 28, 2021Inventors: Maruthi Thiruninravur RAVICHANDRAN, Jeffrey Allen DOERING, Rajit JOHRI, Bhavesh Ravindra PARADKAR, Dushyant K. PALEJIYA, Jason MEYER
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Publication number: 20200269702Abstract: A vehicle propulsion system configured to generate wheel torque includes an engine arranged to output a first propulsion torque to a transmission and an electric motor arranged to output a second propulsion torque downstream of the transmission. The vehicle propulsion system also includes a controller programmed to, in response to detecting a lash crossing associated with one of the electric motor and the transmission, set a torque slew rate of the other one of the electric motor and transmission such that each of the electric motor and transmission undergoes lash crossings at different points in time.Type: ApplicationFiled: February 25, 2019Publication date: August 27, 2020Inventors: Jason MEYER, Jeffrey Allen DOERING, Maruthi Thiruninravur RAVICHANDRAN