Patents by Inventor Ashrit Das
Ashrit Das 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: 11584343Abstract: A method for the automated control of the longitudinal movement of a motor vehicle having an automated positive acceleration process in a longitudinal direction of the vehicle and an automated deceleration in the longitudinal direction of the vehicle. An acceleration variable is determined based on a jerk value and limited in terms of absolute value. And the jerk value is in turn determined in a driving mode in which, starting from a vehicle actual longitudinal speed and a vehicle actual longitudinal acceleration, the motor vehicle is adjusted to a predeterminable vehicle longitudinal speed taking into account a predeterminable maximum positive driving mode vehicle longitudinal acceleration, a predeterminable maximum driving mode vehicle longitudinal deceleration and at least one predeterminable driving operating mode jerk absolute value which limits the jerk.Type: GrantFiled: October 23, 2019Date of Patent: February 21, 2023Assignee: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Patent number: 11084472Abstract: A method and system for jerk-free stopping of a motor vehicle to automatically bring the motor vehicle to a standstill at a predetermined destination point, wherein the deceleration exerted on the motor vehicle is ascertained, entirely or in part, as the difference of a spring force component and a damping component, with the damping component being proportional to the present vehicle velocity.Type: GrantFiled: July 17, 2017Date of Patent: August 10, 2021Assignee: Ford Global Technologies, LLCInventors: Ashrit Das, John Broderick
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Publication number: 20210139007Abstract: A computer includes a processor and a memory, the memory storing instructions executable by the processor to input a current trajectory and a planned path for a vehicle to a state observer algorithm to obtain a target yaw rate, compare the target yaw rate to an actual yaw rate to determine one of an oversteer or an understeer condition, and apply brakes on one or more but less than all wheels of the vehicle based on determining the understeer or oversteer condition.Type: ApplicationFiled: November 11, 2019Publication date: May 13, 2021Applicant: Ford Global Technologies, LLCInventors: Lodewijk Wijffels, Joshua Guerra, Donald Bradfield, Ashrit Das, Bradford Fillion, William Gregory Suter
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Patent number: 10821947Abstract: A computer includes a processor and a memory storing instructions executable by the processor to determine at least one of a vehicle pitch or a longitudinal center of gravity from data measured while deactivating a first brake for a first axle and applying a second brake for a second axle, and operate the vehicle based on the at least one of vehicle pitch or longitudinal center of gravity. The instructions may further include to determine a vehicle weight from the data, and operate the vehicle based on the vehicle weight.Type: GrantFiled: October 3, 2018Date of Patent: November 3, 2020Assignee: Ford Global Technologies, LLCInventors: Lodewijk Wijffels, Devon Eyerman, Joshua Guerra, Sagar Avaneendra Tatipamula, Ashrit Das
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Publication number: 20200108811Abstract: A computer includes a processor and a memory storing instructions executable by the processor to determine at least one of a vehicle pitch or a longitudinal center of gravity from data measured while deactivating a first brake for a first axle and applying a second brake for a second axle, and operate the vehicle based on the at least one of vehicle pitch or longitudinal center of gravity. The instructions may further include to determine a vehicle weight from the data, and operate the vehicle based on the vehicle weight.Type: ApplicationFiled: October 3, 2018Publication date: April 9, 2020Applicant: Ford Global Technologies, LLCInventors: LODEWIJK WIJFFELS, DEVON EYERMAN, JOSHUA GUERRA, SAGAR AVANEENDRA TATIPAMULA, ASHRIT DAS
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Publication number: 20200055499Abstract: A method for the automated control of the longitudinal movement of a motor vehicle having an automated positive acceleration process in a longitudinal direction of the vehicle and an automated deceleration in the longitudinal direction of the vehicle. An acceleration variable is determined based on a jerk value and limited in terms of absolute value. And the jerk value is in turn determined in a driving mode in which, starting from a vehicle actual longitudinal speed and a vehicle actual longitudinal acceleration, the motor vehicle is adjusted to a predeterminable vehicle longitudinal speed taking into account a predeterminable maximum positive driving mode vehicle longitudinal acceleration, a predeterminable maximum driving mode vehicle longitudinal deceleration and at least one predeterminable driving operating mode jerk absolute value which limits the jerk.Type: ApplicationFiled: October 23, 2019Publication date: February 20, 2020Applicant: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Patent number: 10532726Abstract: The invention relates to a method for decelerating a vehicle (10) moving at low speed (vV), in particular by using a hydraulically or pneumatically operated braking system (26), with the following steps: determining, by means of the speed sensor (32), whether the speed (vV) of the vehicle (10) falls short of a predeterminable first limiting value (vC1); if the speed (vV) of the vehicle (10) falls short of the first limiting value, increasing the propulsion torque (MA) transmitted to the drive train (18); and decelerating the vehicle (10) by increasing the braking torque (MB) acting on the wheels (20) by means of the controller (36).Type: GrantFiled: March 21, 2018Date of Patent: January 14, 2020Assignee: Ford Global Technologies, LLCInventor: Ashrit Das
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Patent number: 10471938Abstract: A method for the automated control of the longitudinal movement of a motor vehicle having an automated positive acceleration process in a longitudinal direction of the vehicle and an automated deceleration in the longitudinal direction of the vehicle. An acceleration variable is determined based on a jerk value and limited in terms of absolute value. And the jerk value is in turn determined in a driving mode in which, starting from a vehicle actual longitudinal speed and a vehicle actual longitudinal acceleration, the motor vehicle is adjusted to a predeterminable vehicle longitudinal speed taking into account a predeterminable maximum positive driving mode vehicle longitudinal acceleration, a predeterminable maximum driving mode vehicle longitudinal deceleration and at least one predeterminable driving operating mode jerk absolute value which limits the jerk.Type: GrantFiled: March 13, 2017Date of Patent: November 12, 2019Assignee: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Patent number: 10384680Abstract: The invention relates to a method for longitudinal control of a motor vehicle, the motor vehicle having an engine and a braking system. The method including receiving a torque demand from a controller for controlling the speed of the vehicle, and providing a torque on the basis of this torque demand, whereby, depending on the value of the torque demand, a brake torque counteracts the torque demand to control longitudinal vehicle movement.Type: GrantFiled: March 15, 2017Date of Patent: August 20, 2019Assignee: Ford Global Technologies, LLC.Inventors: Ashrit Das, Marie Preusser, Thomas Svensson
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Patent number: 10196062Abstract: A method for stopping of a motor vehicle including providing a creep torque via a drive train of the motor vehicle and then increasing, independently of the driver, engine speed of a drive engine of the drive train to increase a drive torque of the drive engine and simultaneously increasing, independently of the driver, a braking torque of a brake system of the motor vehicle to balance the drive torque and the braking torque of the motor wherein the maximum braking torque is as great as the creep torque during a standstill of the motor vehicle. The method then maintains the braking torque and simultaneously reduces the engine speed of the drive engine to point at which the motor vehicle comes to a standstill.Type: GrantFiled: April 14, 2017Date of Patent: February 5, 2019Assignee: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Publication number: 20180273017Abstract: The invention relates to a method for decelerating a vehicle (10) moving at low speed (vV), in particular by using a hydraulically or pneumatically operated braking system (26), with the following steps: determining, by means of the speed sensor (32), whether the speed (vV) of the vehicle (10) falls short of a predeterminable first limiting value (vC1); if the speed (vV) of the vehicle (10) falls short of the first limiting value, increasing the propulsion torque (MA) transmitted to the drive train (18); and decelerating the vehicle (10) by increasing the braking torque (MB) acting on the wheels (20) by means of the controller (36).Type: ApplicationFiled: March 21, 2018Publication date: September 27, 2018Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventor: Ashrit DAS
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Publication number: 20180015913Abstract: A method and system for jerk-free stopping of a motor vehicle to automatically bring the motor vehicle to a standstill at a predetermined destination point, wherein the deceleration exerted on the motor vehicle is ascertained, entirely or in part, as the difference of a spring force component and a damping component, with the damping component being proportional to the present vehicle velocity.Type: ApplicationFiled: July 17, 2017Publication date: January 18, 2018Applicant: Ford Global Technologies, LLCInventors: Ashrit Das, John Broderick
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Publication number: 20170297575Abstract: A method for stopping of a motor vehicle including providing a creep torque via a drive train of the motor vehicle and then increasing, independently of the driver, engine speed of a drive engine of the drive train to increase a drive torque of the drive engine and simultaneously increasing, independently of the driver, a braking torque of a brake system of the motor vehicle to balance the drive torque and the braking torque of the motor wherein the maximum braking torque is as great as the creep torque during a standstill of the motor vehicle. The method then maintains the braking torque and simultaneously reduces the engine speed of the drive engine to point at which the motor vehicle comes to a standstill.Type: ApplicationFiled: April 14, 2017Publication date: October 19, 2017Applicant: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Publication number: 20170267236Abstract: The invention relates to a method for longitudinal control of a motor vehicle, the motor vehicle having an engine and a braking system. The method including receiving a torque demand from a controller for controlling the speed of the vehicle, and providing a torque on the basis of this torque demand, whereby, depending on the value of the torque demand, a brake torque counteracts the torque demand to control longitudinal vehicle movement.Type: ApplicationFiled: March 15, 2017Publication date: September 21, 2017Applicant: Ford Global Technologies, LLCInventors: Ashrit Das, Marie Preusser, Thomas Svensson
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Publication number: 20170259795Abstract: A method for the automated control of the longitudinal movement of a motor vehicle having an automated positive acceleration process in a longitudinal direction of the vehicle and an automated deceleration in the longitudinal direction of the vehicle. An acceleration variable is determined based on a jerk value and limited in terms of absolute value. And the jerk value is in turn determined in a driving mode in which, starting from a vehicle actual longitudinal speed and a vehicle actual longitudinal acceleration, the motor vehicle is adjusted to a predeterminable vehicle longitudinal speed taking into account a predeterminable maximum positive driving mode vehicle longitudinal acceleration, a predeterminable maximum driving mode vehicle longitudinal deceleration and at least one predeterminable driving operating mode jerk absolute value which limits the jerk.Type: ApplicationFiled: March 13, 2017Publication date: September 14, 2017Applicant: Ford Global Technologies, LLCInventors: Ashrit Das, Thomas Svensson
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Publication number: 20170210368Abstract: A system and method for operating a brake system of a vehicle including determining if the vehicle is stopped. Determining a current brake pressure, a braking deceleration and a dynamic brake pressure corresponding to the braking deceleration. Based on the current brake pressure and the dynamic brake pressure determining a differential brake pressure. A holding brake pressure for holding the vehicle is determined based on the differential brake pressure and operating the brake system with the holding brake pressure.Type: ApplicationFiled: January 26, 2017Publication date: July 27, 2017Applicant: Ford Global Technologies, LLCInventors: Thomas Svensson, Ashrit Das