Patents by Inventor Naser Mehrabi
Naser Mehrabi 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: 11946515Abstract: A method for determining, in real-time, an electronic limited-slip differential (eLSD) clutch torque includes receiving vehicle data in real-time, wherein the vehicle data includes a torque request, determining a preliminary eLSD clutch torque using a neural network and the vehicle data, determining clutch torque bounds of the eLSD using a physics-based model, determining whether the preliminary eLSD clutch torque is outside the clutch torque bounds of the eLSD, adjusting the preliminary eLSD clutch torque using clutch torque bounds to determine a final clutch torque of the eLSD in response to determining that the preliminary eLSD clutch torque is outside the clutch torque bounds of the eLSD, and commanding, in real-time, the eLSD to apply the final clutch torque to a clutch of the eLSD.Type: GrantFiled: September 18, 2023Date of Patent: April 2, 2024Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Arash Hashemi, Sresht Gurumoorthi Annadevara, Naser Mehrabi, SeyedAlireza Kasaiezadeh Mahabadi, Lapo Frascati
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Publication number: 20240025393Abstract: A system comprises a computer including a processor and a memory. The memory includes instructions such that the processor is programmed to: determine an occurrence of intentional drift event, and in response to determining the occurrence of the intentional drift event, determine a front torque target and a rear torque target.Type: ApplicationFiled: July 15, 2022Publication date: January 25, 2024Inventors: Naser Mehrabi, Nauman Sohani, Mustafa Hakan Turhan, Saurabh Kapoor, Sresht Gurumoorthi Annadevara, SeyedAlireza Kasaiezadeh Mahabadi, Hualin Tan, James H. Holbrook
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Patent number: 11820437Abstract: An aerodynamic deflector on the vehicle is repositionable. An actuator is coupled with the aerodynamic deflector. A controller configured to: detect a performance mode of operation of the vehicle; determine a requested lateral acceleration; calculate a control adjustment of the aerodynamic deflector to generate a downforce to achieve the requested lateral acceleration and maximize lateral grip of the vehicle; and operate the actuator to effect the control adjustment of the aerodynamic deflector to generate the downforce on the vehicle.Type: GrantFiled: November 24, 2020Date of Patent: November 21, 2023Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Seyedeh Asal Nahidi, Saurabh Kapoor, SeyedAlireza Kasaiezadeh Mahabadi, Naser Mehrabi, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi
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Patent number: 11724689Abstract: Systems and methods for controlling a vehicle are provided. The systems and methods include a sensor system and a processor configured to execute program instructions, to cause the at least one processor to: receive yaw rate values, lateral acceleration values and longitudinal velocity values for the vehicle from the sensor system, determine side slip angle parameter values based on the yaw rate values, lateral acceleration values and longitudinal velocity values, determine phase portrait angles based on the side slip angle parameter values and the yaw rate values, wherein the phase portrait angles each represent an angle between yaw rate and side slip angle for the vehicle in a phase portrait of yaw rate and side slip angle, detect or predict vehicle instability based at least on the phase portrait angles, and when vehicle instability is detected or predicted, control motion of the vehicle to at least partly correct the vehicle instability.Type: GrantFiled: September 14, 2021Date of Patent: August 15, 2023Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ehsan Asadi, Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, Yubiao Zhang, Hualin Tan, Naser Mehrabi
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Patent number: 11651633Abstract: A system includes a clutch state module and a clutch torque module. The clutch state module is configured to determine whether a clutch of an electronic limited slip differential is locked or unlocked. The electronic limited slip differential couples an engine of a vehicle to left and right wheels of the vehicle. The clutch torque module is configured to estimate an actual torque transferred by the clutch using a first clutch torque model when the electronic limited slip differential is unlocked, and estimate the actual clutch torque using a second clutch torque model when the electronic limited slip differential is locked. The second clutch torque model is different than the first clutch torque model.Type: GrantFiled: May 20, 2021Date of Patent: May 16, 2023Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Yubiao Zhang, SeyedAlireza Kasaiezadeh Mahabadi, Seyedeh Asal Nahidi, Naser Mehrabi, Hualin Tan, Bakhtiar B. Litkouhi
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Publication number: 20230079933Abstract: Systems and methods for determining whether a vehicle is in an understeer or oversteer situation. The system includes a controller circuit coupled to an IMU and an EPS, and programmed to: calculate, for a steered first axle, an axle-based pneumatic trail for using IMU measurements and EPS signals and estimate a saturation level as a function of a distance between the axle-based pneumatic trail and zero. The system estimates, for an unsteered second axle, an axle lateral force curve with respect to a slip angle of the second axle, and a saturation level as a function of when the axle lateral force curve with respect to the slip angle transitions from positive values to negative values. The saturation level of the first axle and the second axle are integrated. The system determines that the vehicle is in an understeer or oversteer situation as a function of the integrated saturation levels.Type: ApplicationFiled: September 8, 2021Publication date: March 16, 2023Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Naser Mehrabi, Saurabh Kapoor, Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi
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Publication number: 20230077673Abstract: Systems and methods for controlling a vehicle are provided. The systems and methods include a sensor system and a processor configured to execute program instructions, to cause the at least one processor to: receive yaw rate values, lateral acceleration values and longitudinal velocity values for the vehicle from the sensor system, determine side slip angle parameter values based on the yaw rate values, lateral acceleration values and longitudinal velocity values, determine phase portrait angles based on the side slip angle parameter values and the yaw rate values, wherein the phase portrait angles each represent an angle between yaw rate and side slip angle for the vehicle in a phase portrait of yaw rate and side slip angle, detect or predict vehicle instability based at least on the phase portrait angles, and when vehicle instability is detected or predicted, control motion of the vehicle to at least partly correct the vehicle instability.Type: ApplicationFiled: September 14, 2021Publication date: March 16, 2023Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ehsan Asadi, Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, Yubiao Zhang, Hualin Tan, Naser Mehrabi
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Publication number: 20220383668Abstract: A system includes a clutch state module and a clutch torque module. The clutch state module is configured to determine whether a clutch of an electronic limited slip differential is locked or unlocked. The electronic limited slip differential couples an engine of a vehicle to left and right wheels of the vehicle. The clutch torque module is configured to estimate an actual torque transferred by the clutch using a first clutch torque model when the electronic limited slip differential is unlocked, and estimate the actual clutch torque using a second clutch torque model when the electronic limited slip differential is locked. The second clutch torque model is different than the first clutch torque model.Type: ApplicationFiled: May 20, 2021Publication date: December 1, 2022Inventors: Yubiao ZHANG, SeyedAlireza KASAIEZADEH MAHABADI, Seyedeh Asal NAHIDI, Naser MEHRABI, Hualin TAN, Bakhtiar B. LITKOUHI
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Patent number: 11396287Abstract: A vehicle, system and method of operating the vehicle. A sensor measures a dynamic parameter of the vehicle. A processor determines a lateral force on a first tire based on the dynamic parameter of the vehicle, determines a longitudinal force on the first tire that achieves a maximal grip of the first tire for the lateral force, and adjusts a first torque on the first tire in order to achieve the determined longitudinal force at the first tire.Type: GrantFiled: February 14, 2020Date of Patent: July 26, 2022Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, Naser Mehrabi, Saurabh Kapoor, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi
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Publication number: 20220161874Abstract: Systems and methods are provided for generating a downforce on a vehicle. An aerodynamic deflector on the vehicle is repositionable. An actuator is coupled with the aerodynamic deflector. A controller configured to: detect a performance mode of operation of the vehicle; determine a requested lateral acceleration; calculate a control adjustment of the aerodynamic deflector to generate a downforce to achieve the requested lateral acceleration and maximize lateral grip of the vehicle; and operate the actuator to effect the control adjustment of the aerodynamic deflector to generate the downforce on the vehicle.Type: ApplicationFiled: November 24, 2020Publication date: May 26, 2022Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Seyedeh Asal Nahidi, Saurabh Kapoor, SeyedAlireza Kasaiezadeh Mahabadi, Naser Mehrabi, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi
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Patent number: 11338796Abstract: A traction control module includes a sensor/estimation module configured to output wheel stability data based on a plurality of wheel condition inputs and a wheel stability monitoring module configured to calculate a plurality of wheel stability predictors based on the wheel stability data. Each of the wheel stability predictors is independently indicative of a wheel slip condition. The traction control module further includes a wheel stability data fusion module configured to receive each of the plurality of wheel stability predictors, combine selected wheel stability predictors from the plurality of wheel stability predictors to generate combinations of the wheel stability predictors, and selectively output a torque reduction request based on the combinations of the wheel stability predictors.Type: GrantFiled: December 17, 2020Date of Patent: May 24, 2022Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Yubiao Zhang, SeyedAlireza Kasaiezadeh Mahabadi, Ehsan Asadi, Naser Mehrabi, Hualin Tan
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Patent number: 11318924Abstract: An axle torque distribution system includes a memory and a control module. The memory stores a steering angle and a toque distribution algorithm. The control module executes the torque distribution algorithm to: obtain the steering angle; based on the steering angle, determine total lateral force requested for axles of a vehicle; based on the total lateral force requested, determine lateral forces requested for the axles while constraining lateral force distribution between the axles, where the constraining of the lateral force distribution includes, based on maximum lateral force capacities of tires of the vehicle, limiting the lateral forces requested for the axles; determine available longitudinal capacities for the axles based on the lateral forces requested respectively for the axles; determine torque capacities of the axles based on the lateral forces requested respectively for the axles; and control distribution of torque to the axles based on the torque capacities of the axles.Type: GrantFiled: January 11, 2021Date of Patent: May 3, 2022Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Saurabh Kapoor, Naser Mehrabi, Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi
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Publication number: 20210253089Abstract: A vehicle, system and method of operating the vehicle. A sensor measures a dynamic parameter of the vehicle. A processor determines a lateral force on a first tire based on the dynamic parameter of the vehicle, determines a longitudinal force on the first tire that achieves a maximal grip of the first tire for the lateral force, and adjusts a first torque on the first tire in order to achieve the determined longitudinal force at the first tire.Type: ApplicationFiled: February 14, 2020Publication date: August 19, 2021Inventors: Seyedeh Asal Nahidi, SeyedAlireza Kasaiezadeh Mahabadi, Naser Mehrabi, Saurabh Kapoor, James H. Holbrook, Hualin Tan, Bakhtiar B. Litkouhi