Patents by Inventor William L. Aldrich, III
William L. Aldrich, III 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: 10597023Abstract: A hybrid powertrain system includes an engine and an electric machine respectively connected to first and second drive axles, with the electric machine decoupled from the engine. The system includes a battery pack and a controller. The controller has slip integrators with a corresponding integrator value for a given one of the drive axles. The integrator values are indicative of an accumulated amount of drive wheel slip over a calibrated duration or window. The integrator values change responsive to axle torque and traction control status signal. The integrator values are added together to derive an integrator sum. Responsive to the integrator sum exceeding a calibrated integrator threshold, the controller executes a control action, including automatically executing a Weather Mode in which energy use of the battery pack is reserved for traction control/propulsion of the vehicle.Type: GrantFiled: June 18, 2018Date of Patent: March 24, 2020Assignee: GM Global Technology Operations LLCInventors: William L. Aldrich, III, Aniket P. Kothari
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Publication number: 20190381991Abstract: A hybrid powertrain system includes an engine and an electric machine respectively connected to first and second drive axles, with the electric machine decoupled from the engine. The system includes a battery pack and a controller. The controller has slip integrators with a corresponding integrator value for a given one of the drive axles. The integrator values are indicative of an accumulated amount of drive wheel slip over a calibrated duration or window. The integrator values change responsive to axle torque and traction control status signal. The integrator values are added together to derive an integrator sum. Responsive to the integrator sum exceeding a calibrated integrator threshold, the controller executes a control action, including automatically executing a Weather Mode in which energy use of the battery pack is reserved for traction control/propulsion of the vehicle.Type: ApplicationFiled: June 18, 2018Publication date: December 19, 2019Applicant: GM Global Technology Operations LLCInventors: William L. Aldrich, III, Aniket P. Kothari
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Patent number: 9862371Abstract: A method is provided for controlling a hybrid electric vehicle. The vehicle includes at least one motor-generator, an internal combustion engine employing a camshaft and a camshaft phaser, and an energy-storage device operatively connected to the engine and to the at least one motor-generator. The method includes determining whether a deceleration of the vehicle is desired, and ceasing a supply of fuel to the engine when the deceleration is desired. The method additionally includes regulating the camshaft phaser to a predetermined fuel cut-off position when the supply of fuel to the engine has been ceased, such that a magnitude of compression pulses in the engine is reduced relative to when the engine is being fueled. A system for controlling the hybrid electric vehicle and for executing the above method is also provided.Type: GrantFiled: November 1, 2010Date of Patent: January 9, 2018Assignee: GM Global Technology Operations LLCInventors: Michael J. Pitsch, Lan Wang, Shannon E. Reeves, William L. Aldrich, III
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Patent number: 9381911Abstract: A method of controlling a vehicle with a hybrid powertrain with an engine and a motor/generator includes monitoring net axle torque on the drive axle, monitoring vehicle deceleration rate, monitoring vehicle speed, and controlling the motor/generator to stop rotation of the engine crankshaft when the vehicle speed is non-zero and below a predetermined vehicle speed auto-stop enable threshold if torque percentage braking torque is greater than a predetermined percentage braking torque and the vehicle deceleration rate is greater than a predetermined threshold vehicle deceleration rate. A hybrid vehicle has a controller with a processor that executes a stored algorithm to carry out the method.Type: GrantFiled: August 20, 2014Date of Patent: July 5, 2016Assignee: GM Global Technology Operations LLCInventors: William L. Aldrich, III, Paul S. Lombardo, Jeffrey R. Aldrich
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Patent number: 9302674Abstract: A method for maximizing regenerative energy captured by an electric machine in a powertrain including an engine, the electric machine and a transmission device configured to transfer torque through a driveline includes detecting an operator brake request and monitoring a time between the detected operator brake request and a preceding operator brake request that was last detected. A maximized regenerative deceleration event is initiated if the time exceeds a predetermined threshold time that includes monitoring a current fixed gear ratio that is selected from among a plurality of fixed gear ratios of the transmission device when the operator brake request is detected and applying a magnitude of torque at the axle that is sufficient for achieving a maximum capability of the electric machine to capture regenerative energy in the current fixed gear ratio.Type: GrantFiled: September 5, 2013Date of Patent: April 5, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: William L. Aldrich, III, Matthew Hawkins, Sean W. McGrogan
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Publication number: 20160052510Abstract: A method of controlling a vehicle with a hybrid powertrain with an engine and a motor/generator includes monitoring net axle torque on the drive axle, monitoring vehicle deceleration rate, monitoring vehicle speed, and controlling the motor/generator to stop rotation of the engine crankshaft when the vehicle speed is non-zero and below a predetermined vehicle speed auto-stop enable threshold if torque percentage braking torque is greater than a predetermined percentage braking torque and the vehicle deceleration rate is greater than a predetermined threshold vehicle deceleration rate. A hybrid vehicle has a controller with a processor that executes a stored algorithm to carry out the method.Type: ApplicationFiled: August 20, 2014Publication date: February 25, 2016Inventors: William L. Aldrich, III, Paul S. Lombardo, Jeffrey R. Aldrich
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Patent number: 9260087Abstract: A brake system for a vehicle having a hydraulic brake system and a regenerative brake system and a method of controlling the same is provided. The brake system may include a brake pedal having a range of motion and configured to control the application of the hydraulic brake system based upon a position of the brake pedal within the range of motion. The brake system may further include a brake controller configured to determine an inflection position of the brake pedal, the inflection position being a position of the brake pedal within the range of motion when the hydraulic brake system begins to apply a brake pressure over a predetermined threshold, wherein the brake controller applies the regenerative brake system based upon inflection position.Type: GrantFiled: September 29, 2010Date of Patent: February 16, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: William L. Aldrich, III, Andrew M. Zettel, Ammar A. Atmeh
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Publication number: 20150367837Abstract: A method for controlling the powertrain includes the following steps: (a) receiving a torque request; (b) determining, via a system control module, whether the internal combustion engine is operating in an engine component-protection mode; and (c) commanding, via the system control module, the internal combustion engine and the electric motor-generator to adjust the engine output power and a motor output power, respectively, so as to generate a powertrain output power necessary to achieve the torque requested if the internal combustion engine is operating in the engine component-protection mode. Another method can control the powertrain to maintain a desired powertrain output power when an electric motor-generator is operating in a derate mode.Type: ApplicationFiled: June 20, 2014Publication date: December 24, 2015Inventors: GORO TAMAI, LAN WANG, WILLIAM L. ALDRICH, III
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Patent number: 9126496Abstract: Method for adjusting a state-of-charge within an electrical energy storage device of a hybrid powertrain system includes monitoring a plurality of electrical energy storage device parameters and determining a discharge power capability of the electrical energy storage device based on the monitored plurality of electrical energy storage device parameters. If the discharge capability is less than a first threshold, a state-of charge adjustment mode is activated. The state-of-charge adjustment mode includes increasing a commanded state-of-charge to an elevated state-of-charge to increase the discharge capability to achieve the first threshold and maintaining the commanded state-of-charge at the elevated state-of-charge until the discharge capability achieves the first threshold.Type: GrantFiled: June 26, 2013Date of Patent: September 8, 2015Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Brenton J. Bergkoetter, William L. Aldrich, III, Brian L. Spohn, Todd Michael York, Andrew Meintz
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Patent number: 9109566Abstract: A hybrid engine control system comprises a hybrid engine control module and a torque mitigation module. The hybrid engine control module selectively stops an internal combustion engine (ICE). The hybrid engine control module selectively starts the ICE based upon driver inputs and non-driver inputs. The torque mitigation module reduces torque transfer from the ICE to a driveline while the ICE is started based upon the non-driver inputs and maintains torque transfer from the ICE to the driveline while the ICE is started based upon the driver inputs. A method comprises selectively stopping an internal combustion engine (ICE); selectively starting the ICE based upon driver inputs and non-driver inputs; reducing torque transfer from the ICE to a driveline while the ICE is started based upon the non-driver inputs; and maintaining torque transfer from the ICE to the driveline while the ICE is started based upon the driver inputs.Type: GrantFiled: December 12, 2007Date of Patent: August 18, 2015Inventors: William L. Aldrich, III, Goro Tamai, Mark A. Zerbini, Usman Khan
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Publication number: 20150066266Abstract: A method for maximizing regenerative energy captured by an electric machine in a powertrain including an engine, the electric machine and a transmission device configured to transfer torque through a driveline includes detecting an operator brake request and monitoring a time between the detected operator brake request and a preceding operator brake request that was last detected. A maximized regenerative deceleration event is initiated if the time exceeds a predetermined threshold time that includes monitoring a current fixed gear ratio that is selected from among a plurality of fixed gear ratios of the transmission device when the operator brake request is detected and applying a magnitude of torque at the axle that is sufficient for achieving a maximum capability of the electric machine to capture regenerative energy in the current fixed gear ratio.Type: ApplicationFiled: September 5, 2013Publication date: March 5, 2015Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: WILLIAM L. ALDRICH, III, MATTHEW HAWKINS, SEAN W. MCGROGAN
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Publication number: 20150005996Abstract: Method for adjusting a state-of-charge within an electrical energy storage device of a hybrid powertrain system includes monitoring a plurality of electrical energy storage device parameters and determining a discharge power capability of the electrical energy storage device based on the monitored plurality of electrical energy storage device parameters. If the discharge capability is less than a first threshold, a state-of charge adjustment mode is activated. The state-of-charge adjustment mode includes increasing a commanded state-of-charge to an elevated state-of-charge to increase the discharge capability to achieve the first threshold and maintaining the commanded state-of-charge at the elevated state-of-charge until the discharge capability achieves the first threshold.Type: ApplicationFiled: June 26, 2013Publication date: January 1, 2015Inventors: BRENTON J. BERGKOETTER, WILLIAM L. ALDRICH, III, BRIAN L. SPOHN, TODD MICHAEL YORK, ANDREW MEINTZ
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Patent number: 8761977Abstract: A method for optimizing an engine idle speed in a vehicle having an engine, a motor generator unit (MGU), and an energy storage system (ESS) includes determining vehicle operating values, including at least one of: an electrical load of an accessory, a torque capacity of the MGU, a temperature of the MGU, an efficiency of the MGU, and a state of charge (SOC) of the ESS. The method also includes calculating a set of engine speed values using the set of vehicle operating values, and using a controller to command the engine idle speed as a function of the set of engine speed values. A vehicle includes an engine, an ESS, an MGU, and a controller having an algorithm adapted for optimizing an idle speed of the engine as set forth above.Type: GrantFiled: October 15, 2009Date of Patent: June 24, 2014Assignee: GM Global Technology Operations LLCInventors: Donald Chan, William L. Aldrich, III, John L. Lahti, Birendra P. Bhattarai, Krunal P. Patel, Ning Jin
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Patent number: 8626411Abstract: A control system for a vehicle, comprises a torque determination module, a control module, and a transmission control module. The torque determination module determines torque produced by an internal combustion engine. The control module sets a signal to an active state when the torque is greater than a predetermined torque and a slip amount between an engine output speed and a transmission input speed is zero. The predetermined torque corresponds to a potential vibration amount when the slip amount is zero. The transmission control module selectively increases the slip amount above zero in response to the setting of the signal to the active state.Type: GrantFiled: January 28, 2010Date of Patent: January 7, 2014Inventors: Christopher E. Whitney, William L. Aldrich, III, Jeffrey M. Kaiser, Daniel J. Wickman, Scott A. Hearld
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Patent number: 8538644Abstract: A minimum torque module selectively determines a first minimum propulsion torque based on second and third minimum propulsion torques when a torque converter clutch is in unlocked and locked states, respectively. A zero pedal torque module selectively sets a zero pedal torque equal to the first minimum propulsion torque. A pedal request module determines a pedal torque request based on an accelerator pedal position, a vehicle speed, and the zero pedal torque. A driver request module determines a driver axle torque request based on the pedal torque request. A shaping module selectively shapes the driver axle torque request into a shaped driver axle torque request. A conversion module converts the first minimum propulsion torque into a minimum axle torque. A final driver request module sets a final driver axle torque request equal to a greater of the shaped driver axle torque request and the minimum axle torque.Type: GrantFiled: April 20, 2010Date of Patent: September 17, 2013Inventors: Christopher E. Whitney, Robert C. Simon, Jr., William L. Aldrich, III, Jun Lu, Birendra P. Bhattarai, Adam J Heisel, Ning Jin
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Patent number: 8499734Abstract: A control system for a hybrid vehicle that includes an internal combustion engine and an electric motor includes an engine speed control module, an air pressure control module, and an engine torque control module. The engine speed control module increases engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold. The air pressure control module decreases intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold. The engine torque control module starts the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold.Type: GrantFiled: October 21, 2009Date of Patent: August 6, 2013Inventors: Lan Wang, Goro Tamai, Michael J. Pitsch, William L. Aldrich, III
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Patent number: 8364332Abstract: A method for controlling a low-voltage circuit of a vehicle having a generator includes monitoring operating conditions of the vehicle and determining whether surplus generator load is available. Available surplus generator load is captured and used to power the low-voltage circuit. The low-voltage circuit may include a low-voltage battery, which may be charged with the surplus generator load. The surplus generator load may be utilized for anti-sulfation of the low-voltage battery. The method is usable with both a hybrid vehicle and a conventional vehicle. The method may further include powering the low-voltage circuit with energy stored in the low-voltage battery as a result of charging the low-voltage battery with the surplus generator load.Type: GrantFiled: January 15, 2010Date of Patent: January 29, 2013Assignee: GM Global Technology Operations LLCInventors: Brenton J. Bergkoetter, William L. Aldrich, III, Goro Tamai
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Patent number: 8355833Abstract: A vehicular system including an electrical sub-system, an engine generating a first torque to drive a crankshaft, an electric machine applying a second torque to the crankshaft, and a mechanical accessory sub-system applying a third torque to the crankshaft. The vehicular system also includes a control sub-system having a processor and a tangible, non-transitory computer-readable medium, storing instructions that, when executed by the processor, cause the processor to (i) during idle operation of the vehicle, select a mode operation, of a plurality of system modes including a charge mode and a discharge mode, to stabilize a net torque being a sum of the first, second, and third torques, and (ii) control operation of at least one of the electric machine and the engine according to the selected mode.Type: GrantFiled: December 2, 2010Date of Patent: January 15, 2013Assignee: GM Global Technology Operations, LLCInventors: Kerem Koprubasi, William L. Aldrich, III
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Patent number: 8319477Abstract: A hybrid control module comprises a vehicle load module and a hybrid battery discharge module. The vehicle load module determines a first power based on power delivered to an accessory power module (APM). The hybrid battery discharge module determines a discharge power based on the first power and selectively controls power consumed by an inverter based on the discharge power when a state of charge of a hybrid battery is less than a first threshold and greater than a second threshold. The inverter and the APM selectively receive power from the hybrid battery.Type: GrantFiled: August 13, 2008Date of Patent: November 27, 2012Inventors: Brenton J. Bergkoetter, William L. Aldrich, III, Donald D. Crites, Damon R. Frisch
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Publication number: 20120143411Abstract: A vehicular system including an electrical sub-system, an engine generating a first torque to drive a crankshaft, an electric machine applying a second torque to the crankshaft, and a mechanical accessory sub-system applying a third torque to the crankshaft. The vehicular system also includes a control sub-system having a processor and a tangible, non-transitory computer-readable medium, storing instructions that, when executed by the processor, cause the processor to (i) during idle operation of the vehicle, select a mode operation, of a plurality of system modes including a charge mode and a discharge mode, to stabilize a net torque being a sum of the first, second, and third torques, and (ii) control operation of at least one of the electric machine and the engine according to the selected mode.Type: ApplicationFiled: December 2, 2010Publication date: June 7, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC.Inventors: Kerem Koprubasi, William L. Aldrich III