公开(公告)号：US20190011004A1

公开(公告)日：2019-01-10

申请号：US15643004

申请日：2017-07-06

Applicant: GM Global Technology Operations LLC

Inventor： Christopher J. Mettrick ,  Mark T. Riefe ,  Michael L. Holly ,  James A. Webster ,  Michael J. Walker ,  Anil K. Sachdev

IPC: F16D65/12 ,  B60R13/00

CPC classification number: F16D65/127 ,  B60R13/005 ,  F16D65/122 ,  F16D65/125 ,  F16D2065/1328 ,  F16D2200/0004 ,  F16D2200/0039 ,  F16D2250/0015 ,  F16D2250/0038

Abstract: A brake rotor comprising a brake pad wear surface; a hat surface; and a decorative insert comprising an insert material, the decorative insert disposed on the brake pad wear surface, the hat surface, or both; wherein at least one of a friction coefficient between the decorative insert and a brake pad is substantially the same as a friction coefficient between the brake pad wear surface and the brake pad, a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the brake pad wear surface, or a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the hat surface; and at least a portion of the decorative insert is visible on the brake pad wear surface, the hat surface, or both.

公开(公告)号：US11047441B2

公开(公告)日：2021-06-29

申请号：US16145679

申请日：2018-09-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David B. Antanaitis ,  Mark T. Riefe

IPC: F16D66/02 ,  B60T17/22 ,  F16D66/00 ,  G07C5/12 ,  G07C5/08 ,  G07C5/00

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.

公开(公告)号：US10697512B2

公开(公告)日：2020-06-30

申请号：US15987010

申请日：2018-05-23

Applicant: GM Global Technology Operations LLC

Inventor： Richard J. Skurkis ,  Paul W. Alexander ,  Anthony L. Smith ,  David Begleiter ,  Mark T. Riefe ,  Steven J. Weber

IPC: F16D65/78

Abstract: A shield assembly is employed for a friction brake used to decelerate a road wheel of a vehicle. The vehicle has a body with a first body end configured to face an incident ambient airflow, a second body end opposite of the first body end, and an underbody section spanning a distance between the first and second ends. The shield assembly includes a first shield component arranged proximate the brake and rotationally fixed relative to the vehicle body. The shield assembly also includes a second shield component operatively connected to the first shield component for shifting relative thereto. The shield assembly additionally includes an actuator employing a shape memory alloy element to shift the second shield component relative to the first shield component in response to a temperature of the brake to thereby direct at least a portion of the airflow to the brake and control temperature thereof.

公开(公告)号：US20200072305A1

公开(公告)日：2020-03-05

申请号：US16509015

申请日：2019-07-11

Applicant: GM Global Technology Operations LLC

Inventor： Henry Zhan ,  Jianfeng Wang ,  Michael L. Holly ,  Mark T. Riefe

IPC: F16D65/10 ,  B60T1/06 ,  F16D65/12

Abstract: A method for manufacturing a ferrous rotational member including the steps of turning a first portion of the friction surface at a sufficient feed rate to provide a first deformed layer on the first portion of the friction surface; fine turning a second portion of the friction surface at a sufficient feed rate to provide a second deformed layer on the second portion of the friction surface; burnishing the first and second portions of the friction surface to achieve a predetermined roughness; and nitrocarburizing the rotational member at a time and temperature sufficient for the diffusion of nitrogen atoms and carbon atoms through the deformed layer to form hardened casings having variable thickness. The ferrous rotational member may be that of a brake rotor having a hub surface and a friction surface, where the hub surface and friction surface have a variable thickness hardened casing.

公开(公告)号：US20190152460A1

公开(公告)日：2019-05-23

申请号：US15820750

申请日：2017-11-22

Applicant: GM Global Technology Operations LLC

Inventor： David B. Antanaitis ,  Mark T. Riefe ,  Kevin D. Connor

IPC: B60T13/74 ,  B60T17/18

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.

公开(公告)号：US20190071062A1

公开(公告)日：2019-03-07

申请号：US15693891

申请日：2017-09-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Matthew A. Robere ,  Mark T. Riefe ,  David B. Antanaitis

IPC: B60T17/22 ,  F16D66/02 ,  B60L7/10 ,  B60L7/24

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. The controller outputs a message indicative of the estimation of the brake pad thickness via an output system in communication with the controller

公开(公告)号：US09441686B2

公开(公告)日：2016-09-13

申请号：US13901646

申请日：2013-05-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent D. Lowe ,  Mark T. Riefe ,  Omar S. Dessouki ,  Mohan Sundar ,  Chia N. Yang

IPC: F16D65/095 ,  F16D55/22 ,  F16D55/227 ,  F16D65/00 ,  F16D55/00

CPC classification number: F16D65/095 ,  F16D55/227 ,  F16D65/0006 ,  F16D2055/0008

Abstract: A brake assembly includes a brake pad, a bracket supporting the brake pad and having a first portion, a second portion spaced apart from the first portion, and a linkage interconnecting the first and second portions. The linkage is configured to transfer tensile loads between the first and second portion, but is characterized by the absence of any bending modes. The absence of bending modes prevents excitation of the linkage, thereby reducing sound generated during application of the brake assembly.

公开(公告)号：US20230332658A1

公开(公告)日：2023-10-19

申请号：US17721661

申请日：2022-04-15

Applicant: GM Global Technology Operations LLC

Inventor： Benjamin Everest Slattery ,  Kevin P. Callaghan ,  Mark T. Riefe

IPC: F16D65/12 ,  B23K26/359 ,  C21D9/00 ,  C21D1/18

CPC classification number: F16D65/127 ,  B23K26/359 ,  F16D65/125 ,  C21D9/0068 ,  C21D1/18 ,  F16D2250/0053 ,  F16D2250/0046 ,  F16D2200/0017 ,  C21D2211/008 ,  C23C8/32

Abstract: Systems and methods of making an enhanced brake rotor having enhanced wear resistance are provided. The systems and methods provide a vehicular rotor comprising a base comprising iron (Fe). The base comprises an outer surface having a laser-hardened portion thereon. The laser-hardened portion comprises martensite and having a thickness of between 10 and 100 microns of the outer surface to define the enhanced brake rotor with enhanced wear resistance.

公开(公告)号：US20230332657A1

公开(公告)日：2023-10-19

申请号：US17721654

申请日：2022-04-15

Applicant: GM Global Technology Operations LLC

Inventor： Benjamin Everest Slattery ,  Kevin P. Callaghan ,  Mark T. Riefe

IPC: F16D65/12

CPC classification number: F16D65/125 ,  F16D65/127 ,  F16D2200/0021 ,  F16D2250/0046 ,  F16D2065/132

Abstract: Systems and methods of making an enhanced vehicular brake rotor having improved wear and corrosion resistance are provided. The enhanced vehicular brake rotor comprises a brake rotor comprising a base comprised of iron (Fe). The base comprises an outer surface having open pores formed thereon. The rotor has a steam-treated layer formed on the outer surface and in the open pores. The steam-treated layer is comprised of iron oxide (Fe3O4) and has a thickness of between 10 and 50 microns for enhanced wear and corrosion resistance to define the enhanced vehicular rotor.

公开(公告)号：US11002328B2

公开(公告)日：2021-05-11

申请号：US16801920

申请日：2020-02-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Richard J. Skurkis ,  Paul W. Alexander ,  Anthony L. Smith ,  David Begleiter ,  Mark T. Riefe ,  Steven J. Weber

IPC: F16D65/78

Abstract: A shield assembly is employed for a friction brake used to decelerate a road wheel of a vehicle. The vehicle has a body with a first body end configured to face an incident ambient airflow, a second body end opposite of the first body end, and an underbody section spanning a distance between the first and second ends. The shield assembly includes a first shield component arranged proximate the brake and rotationally fixed relative to the vehicle body. The shield assembly also includes a second shield component operatively connected to the first shield component for shifting relative thereto. The shield assembly additionally includes an actuator employing a shape memory alloy element to shift the second shield component relative to the first shield component in response to a temperature of the brake to thereby direct at least a portion of the airflow to the brake and control temperature thereof.