Patents by Inventor David B. Antanaitis

David B. Antanaitis 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).

  • Publication number: 20200102993
    Abstract: An exemplary method for determining a remaining life expectancy of a brake component includes the steps of providing vehicle parameters that identify operating conditions of a vehicle, using the vehicle parameters to determine work done by a brake of the vehicle as brake work, using the brake work to determine brake rotor temperature, using the brake rotor temperature to determine a fatigue damage of the brake component, accumulating the fatigue damage to determine a cumulative fatigue damage of the brake component, and comparing the cumulative fatigue damage to a damage limit to provide an estimation of the remaining life expectancy of the brake component.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventors: David B. Antanaitis, Mark T. Riefe
  • Patent number: 10562509
    Abstract: A brake temperature monitoring system configured to monitor at least one of a rotor and hydraulic fluid of a brake mechanism for a vehicle. The system including a controller including a processor and an electronic storage medium, a vehicle velocity sensor, an ambient temperature sensor, and a pre-programmed module. The vehicle velocity sensor is configured to output a velocity signal to the processor. The ambient temperature sensor is configured to output an ambient temperature signal to the processor. The model is pre-programmed into the electronic storage medium, and is adapted to estimate the temperature of at least one of the rotor and the hydraulic fluid. The estimation is based on an ambient air temperature, and a pre-established relationship between a conductive heat transfer factor and a convective heat transfer factor. The convective heat transfer factor is a function of vehicle velocity.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: February 18, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David B. Antanaitis, Mark T. Riefe, Chih-hung Yen
  • Patent number: 10495169
    Abstract: Technical solutions are described to for determining thickness of a vehicle brake rotor. An example method includes providing vehicle parameters that identify operating conditions of a vehicle, and using the vehicle parameters to determine work done by a brake of the vehicle as brake-work. Further, the method includes using the brake work to determine brake rotor temperature, and using the brake rotor temperature to determine brake rotor wear. The method further includes accumulating the brake rotor wear to provide an estimation of the thickness of the vehicle brake rotor.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: December 3, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David B. Antanaitis, Mark T. Riefe, Matthew A. Robere
  • Patent number: 10486674
    Abstract: A system for determining thickness of a brake pad includes a controller configured to provide a total braking energy of a vehicle with a regenerative energy braking system, and a rotor braking system that includes a plurality of brake pads. The system controller determines the work done by the brake pads as a combination of front brake pad work and rear brake pad work, then accumulates the brake pad wear to provide an estimation of the brake pad thickness using the front brake pad work and the rear brake pad work.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: November 26, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Matthew A. Robere, Mark T. Riefe, David B. Antanaitis
  • Publication number: 20190152460
    Abstract: An electromechanical brake system includes a caliper, an electric motor mounted to the caliper, a gear element mechanically connected to the electric motor, an actuator supported by the caliper, the actuator including an actuation member, and a controller operatively connected to the actuator. The controller is operable to selectively engage the actuation member with the gear element to positionally lock the first caliper member relative to the second caliper member.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 23, 2019
    Inventors: David B. Antanaitis, Mark T. Riefe, Kevin D. Connor
  • Publication number: 20190107163
    Abstract: Technical solutions are described for determining thickness of a vehicle brake pad. An example method for estimating brake pad wear on a vehicle includes computing a corner torque for a brake based on corner brake pressure applied to the brake. The method also includes computing a corner power for the brake based on the corner torque. The method also includes computing a rotor temperature of a rotor of the brake based on the corner power. The method also includes determining a brake pad wear rate per unit of power based on the rotor temperature and the corner power. The method also includes computing a brake pad wear based on the brake pad wear rate and the corner power.
    Type: Application
    Filed: October 10, 2017
    Publication date: April 11, 2019
    Inventors: Nojan Medinei, David B. Antanaitis, Steven J. Weber
  • Publication number: 20190071062
    Abstract: A system for determining thickness of a brake pad includes a controller configured to provide a total braking energy of a vehicle with a regenerative energy braking system, and a rotor braking system that includes a plurality of brake pads. The system controller determines the work done by the brake pads as a combination of front brake pad work and rear brake pad work, then accumulates the brake pad wear to provide an estimation of the brake pad thickness using the front brake pad work and the rear brake pad work.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 7, 2019
    Inventors: Matthew A. Robere, Mark T. Riefe, David B. Antanaitis
  • Publication number: 20190017561
    Abstract: Technical solutions are described to for determining thickness of a vehicle brake rotor. An example method includes providing vehicle parameters that identify operating conditions of a vehicle, and using the vehicle parameters to determine work done by a brake of the vehicle as brake-work. Further, the method includes using the brake work to determine brake rotor temperature, and using the brake rotor temperature to determine brake rotor wear. The method further includes accumulating the brake rotor wear to provide an estimation of the thickness of the vehicle brake rotor.
    Type: Application
    Filed: July 17, 2017
    Publication date: January 17, 2019
    Inventors: David B. Antanaitis, Mark T. Riefe, Matthew A. Robere
  • Publication number: 20190009769
    Abstract: A brake temperature monitoring system configured to monitor at least one of a rotor and hydraulic fluid of a brake mechanism for a vehicle. The system including a controller including a processor and an electronic storage medium, a vehicle velocity sensor, an ambient temperature sensor, and a pre-programmed module. The vehicle velocity sensor is configured to output a velocity signal to the processor. The ambient temperature sensor is configured to output an ambient temperature signal to the processor. The model is pre-programmed into the electronic storage medium, and is adapted to estimate the temperature of at least one of the rotor and the hydraulic fluid. The estimation is based on an ambient air temperature, and a pre-established relationship between a conductive heat transfer factor and a convective heat transfer factor. The convective heat transfer factor is a function of vehicle velocity.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 10, 2019
    Inventors: David B. Antanaitis, Mark T. Riefe, Chih-hung Yen
  • Patent number: 9889835
    Abstract: A vehicle includes a brake system. The brake system includes a hydraulic brake line having a line pressure. The vehicle additionally includes a vacuum reservoir. The vacuum reservoir is selectively fluidly coupled to the hydraulic brake line. The vacuum reservoir is configured to, when fluidly coupled to the hydraulic brake line, reduce the line pressure during a drive cycle.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: February 13, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: David B. Antanaitis, Kevin D. Connor, Douglas N. Reed
  • Publication number: 20180037206
    Abstract: A vehicle includes a brake system. The brake system includes a hydraulic brake line having a line pressure. The vehicle additionally includes a vacuum reservoir. The vacuum reservoir is selectively fluidly coupled to the hydraulic brake line. The vacuum reservoir is configured to, when fluidly coupled to the hydraulic brake line, reduce the line pressure during a drive cycle.
    Type: Application
    Filed: August 5, 2016
    Publication date: February 8, 2018
    Inventors: David B. Antanaitis, Kevin D. Connor, Douglas N. Reed
  • Publication number: 20170058982
    Abstract: A number of variations may include a product that may include at least one working friction surface that may include at least two layers that may include a compound layer and a nitrogen diffusion layer wherein the compound layer may have a porosity ranging from about 19% to about 50%.
    Type: Application
    Filed: August 26, 2015
    Publication date: March 2, 2017
    Inventors: MICHAEL L. HOLLY, MARK T. RIEFE, RICHARD A. KAATZ, CARA L. LEARMAN, DAVID B. ANTANAITIS, LISA G. DEVOE
  • Patent number: 9581211
    Abstract: One variation includes a friction material and method of manufacture thereof wherein the friction material includes a transfer layer on a ferritically nitrocarburized component, wherein the transfer layer may be fabricated from glass, rubber, carbon, aramid fiber, filler material, abrasive, or a high-temperature resin.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: February 28, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, David B. Antanaitis, Richard A. Kaatz, Mark T. Riefe, Cara L. Learman
  • Patent number: 9500242
    Abstract: An exemplary embodiment includes an automotive brake component, such as a brake drum or a brake rotor, and an inlay coupled to the automotive brake component. The inlay constituting at least a portion of a braking surface that is acted upon during a braking event. The inlay damping vibrations in the automotive brake component when the component is vibrated.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: November 22, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Patrick J. Monsere, Mark T. Riefe, David B. Antanaitis, Brent D. Lowe, Mohan Sundar
  • Patent number: 9416835
    Abstract: A method of estimating brake pad wear includes determining required braking energy to be dissipated by a braking system as a fraction of total kinetic energy according to an energy partitioning model. The required braking energy is distributed to vehicle braking mechanisms according to a vehicle dynamics model. Rotor temperature of each brake rotor may be determined according to a rotor temperature model that utilizes the required braking energy and the distribution of the required braking energy, and determining brake pad wear of each brake pad according to a brake pad wear model that utilizes the rotor temperature and the distributed required braking energy. A first brake pad wear model is implemented under first operating conditions, and a second brake pad wear model under second operating conditions. The brake pad wear is indicated via a brake pad wear indicator output device. A vehicle has a controller that implements the method.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: August 16, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: David B. Antanaitis, Mark T. Riefe
  • Publication number: 20160138665
    Abstract: A method of estimating brake pad wear includes determining required braking energy to be dissipated by a braking system as a fraction of total kinetic energy according to an energy partitioning model. The required braking energy is distributed to vehicle braking mechanisms according to a vehicle dynamics model. Rotor temperature of each brake rotor may be determined according to a rotor temperature model that utilizes the required braking energy and the distribution of the required braking energy, and determining brake pad wear of each brake pad according to a brake pad wear model that utilizes the rotor temperature and the distributed required braking energy. A first brake pad wear model is implemented under first operating conditions, and a second brake pad wear model under second operating conditions. The brake pad wear is indicated via a brake pad wear indicator output device. A vehicle has a controller that implements the method.
    Type: Application
    Filed: November 13, 2014
    Publication date: May 19, 2016
    Inventors: David B. Antanaitis, Mark T. Riefe
  • Publication number: 20150159710
    Abstract: One variation includes a friction material and method of manufacture thereof wherein the friction material includes a transfer layer on a ferritically nitrocarburized component, wherein the transfer layer may be fabricated from glass, rubber, carbon, aramid fiber, filler material, abrasive, or a high-temperature resin.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 11, 2015
    Applicant: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, David B. Antanaitis, Richard A. Kaatz, Mark T. Riefe, Cara L. Learman
  • Patent number: 8162111
    Abstract: An exemplary embodiment of a brake caliper has a housing with a first chamber and a second chamber. The brake caliper also has a first piston that moves in response to fluid pressure in the first chamber and has a second piston that moves in response to fluid pressure in the second chamber. A brake pad has a leading end portion that is acted upon by the first piston and has a trailing end portion that is acted upon by the second piston. A fluid passage leads to the first chamber. The trailing end portion contacts an associated rotor before the leading end portion contacts the rotor.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: April 24, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Mark T. Riefe, Brent D. Lowe, David B. Antanaitis, Patrick J. Monsere
  • Patent number: 8146719
    Abstract: A brake rotor providing reduced brake pad radial taper wear by providing brake rotor friction surface indent patterns. For example, the indent patterns are the form of radial-biased grooves or linearly arranged cross-drill hole sets, patterned in a configuration that balances brake pad wear, thereby reducing brake pad radial taper wear in a manner tuned specifically for a given type of brake caliper and brake pad material, wherein the reduction in brake pad radial taper wear is accomplished with virtually no penalty to brake pad life.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: April 3, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: David B. Antanaitis, Mark T. Riefe, Brent D. Lowe, Patrick J. Monsere
  • Patent number: 7957875
    Abstract: A brake system control method determines vehicle operating conditions, compares the conditions to an allowable range, and uses a neural network to predict an expected coefficient of friction when the conditions are within the range. When the conditions fall outside of the range, the method determines an amount of required braking force using a constant coefficient of friction, and calculates the required braking force using the expected coefficient of friction when the conditions are within the range. The vehicle operating conditions include a vehicle speed, brake pressure, modeled brake rotor temperature, and apply state. The expected coefficient is multiplied by a constant or a calculated correction factor. A vehicle has an engine, transmission, and braking system, with a controller and an algorithm for predicting a coefficient of friction for two brake rotors, calculating a hydraulic brake pressure, and for applying the braking system using the hydraulic brake pressure.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: June 7, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: David B. Antanaitis, Chia N. Yang