Abstract: A wiper system for use with a windshield includes a track guide, a wiper assembly, a drive mechanism and a wipe mechanism. The wiper assembly has a wiper arm attached at a first end thereof to a rotor rotatably disposed on a wiper carrier, wherein the wiper carrier is engaged with the track guide and is configured for translation therealong. The drive mechanism is connected with the wiper carrier and is configured for positioning the wiper carrier along the track guide. The wipe mechanism is connected with at least one of the rotor and the wiper carrier and is configured to cause the rotor to rotate, thereby causing the wiper arm to produce a wiping motion.
Type:
Grant
Filed:
September 17, 2019
Date of Patent:
April 18, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
James W. Wells, Jeff E. Nasca, Charles W. Wampler, Muhammad E. Abdallah, Nagarajan Sivashanmugam, Richard Nietz, Patrick Kroner, Bryan T. Campbell
Abstract: A method for controlling a fuel cell system having a hydrogen fuel injector/ejector and a control system, includes determining a hydrogen fuel consumption rate associated with a selected power level at steady state, determining a modeled hydrogen fuel flow rate associated with the selected power level and the injector/ejector, determining a modeled effective flow area associated with the injector/ejector, determining a true effective flow area of the injector/ejector, and using the effective flow area to calculate or adjust a command signal, an estimation or an estimation error of at least one of a hydrogen fuel flow rate, an anode leak rate and an anode exhaust valve flow rate.
Type:
Grant
Filed:
November 11, 2021
Date of Patent:
April 18, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
Xiaofeng Wang, Manish Sinha, Chad Dubois, Sergio E. Garcia
Abstract: A battery system with cell groups arranged in modules and with plurality of modules arranged in individual battery sub-packs includes a controller network configured to monitor the sub-packs. The network includes a plurality of cell monitoring units (CMUs); each CMU connected to one module for processing data for respective cell groups. The network also includes multiple voltage sensors on each CMU, with each sensor detecting voltage across one cell group. The network additionally includes an electronic controller programmed with an algorithm and in wireless communication with each CMU. The algorithm identifies when electrical power is disconnected from the RESS and directs electrical current through a selected sub-pack after power is restored. The algorithm also interrogates voltage sensors of a particular CMU, detects a change in voltage triggered by the current, and records a cross-reference between the particular CMU and the selected sub-pack when the change in voltage is detected.
Type:
Grant
Filed:
August 31, 2020
Date of Patent:
April 11, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
Andrew C. Baughman, Thomas Timpf, Jr., Christine E. Cabrera
Abstract: Presented are protective covers for weldable fasteners, methods for making/using such cover-protected weldable fasteners, and motor vehicles with such covered fasteners welded to load-bearing structural members. A weldable fastener assembly includes a fastener, such as a weld-on nut or clip retainer, that is fabricated with a shank and a flange. One end of the shank has a fastener hole that receives therethrough a mating fastener, such as a bolt, screw, stud, or clip. The flange is formed, in whole or in part, from a weldable material for welding to a load-bearing panel or other structural support member. The flange may be integrally formed with and project radially outward from the shank. A protective cover is attached to the flange and covers the fastener hole. The protective cover is frangible and formed, in whole or in part, from a material designed to withstand the temperature at which the weldable material melts.
Abstract: A method of path planning for a host vehicle includes: receiving host vehicle, environmental and obstacle information; calculating one or more projected host vehicle locations; computing a projected obstacle location for each obstacle; and determining a collision potential between each projected host vehicle location and each projected obstacle location. Until a maximum number of steps is reached, and while at least one projected host vehicle location has an associated collision potential below a collision threshold, the method further includes repeating the calculating, computing and determining steps.
Type:
Grant
Filed:
December 8, 2020
Date of Patent:
April 4, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
Divya P. Kulkarni, Hyukseong Kwon, Kenji Yamada, Tiffany J. Hwu, Kyungnam Kim, Rajan Bhattacharyya, Michael J. Daily
Abstract: Presented are finger-proof electrical terminals for battery assemblies, methods for making/using such electrical terminals, and vehicles with battery modules having finger-proof electrical terminals for bolted busbar connections. A battery assembly includes one or more electrochemical battery cells and one or more electrical terminals each electrically connected to the battery cell(s) and having a contact face to electrically connect the battery assembly to an electrical connector. A threaded nut attaches each electrical terminal to one of the electrical connectors. An electrically insulating nut cap is attached to each threaded nut. A battery housing, which stores therein the battery cell(s), includes an electrically insulating housing wall with one or more terminal jackets each mounting therein one of the electrical terminals.
Type:
Grant
Filed:
February 12, 2021
Date of Patent:
April 4, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
Evan J. Dawley, Phillip D. Hamelin, Scott W. Vaubel, Andrew P. Oury, Neil A. Patel
Abstract: A method for controlling operation of a rotary electric machine includes receiving, via a bandwidth-partitioning harmonic compensation regulator (HCR) of a controller, a commanded torque and rotational speed of the electric machine, and calculating, via the HCR in response to enabling conditions, a dq harmonic compensation current and a dq harmonic compensation voltage for one or more predetermined harmonic orders using the commanded torque and the rotational speed. The harmonic compensation current and voltage cancel torque ripple and current ripple in the one or more predetermined harmonic orders. The method may include injecting an acoustic tone at a predetermined harmonic order. The method additionally includes adding the dq harmonic compensation current and voltage to a dq current and voltage command, respectively, to generate adjusted dq current and voltage commands. The electric machine is then controlled using the adjusted dq current and voltage commands.
Type:
Grant
Filed:
October 23, 2020
Date of Patent:
March 21, 2023
Assignee:
GM Global Technology Operations LLC
Inventors:
Vinod Chowdary Peddi, Anno Yoo, Brent S. Gagas, Song He