Inventor
GRENN DANIEL P
US24 patents
⚠️ This page may combine multiple inventors who share the name “GRENN DANIEL P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GM GLOBAL TECH OPERATIONS LLC
8 patentsUS10981557B2Apr 20, 2021
Battery pack balancing systems and control logic for multi-pack electric-drive motor vehicles
GM GLOBAL TECH OPERATIONS LLC5 citations72
US10124679B2Nov 13, 2018
Method and apparatus for recharging an energy storage device on a vehicle
GM GLOBAL TECH OPERATIONS LLC3 citations71
US9533549B2Jan 3, 2017
System and method for controlling heating modes for hybrid electric vehicle (HEV)
GM GLOBAL TECH OPERATIONS LLC2 citations70
US9612289B2Apr 4, 2017
Detection diagnostic for communication loss between a battery system manager controller and a plurality of battery cell sensing boards
GM GLOBAL TECH OPERATIONS LLC2 citations69
US9428073B2Aug 30, 2016
System and method of monitoring a performance level of a battery
GM GLOBAL TECH OPERATIONS LLC2 citations62
US9830751B2Nov 28, 2017
System and method for clearing a readiness bit when a control module of a vehicle is reprogrammed
GM GLOBAL TECH OPERATIONS LLC0 citations52
US10106042B2Oct 23, 2018
Methods of operating contactors in high voltage circuits of vehicles
GM GLOBAL TECH OPERATIONS LLC1 citations45
US10090125B2Oct 2, 2018
Methods of determining the order of operating contactors in high voltage circuits
GM GLOBAL TECH OPERATIONS LLC0 citations35
GEN MOTORS CORP
5 patentsUS5345817ASep 13, 1994
Misfire detection in internal combustion engines
GEN MOTORS CORP128 citations96
US6531872B1Mar 11, 2003
Ignition-off timer diagnostic
GEN MOTORS CORP18 citations92
US4768480ASep 6, 1988
Engine with spark ignition operation through the oil pressure switch after fuel shutoff
GEN MOTORS CORP14 citations70
US6386021B1May 14, 2002
Oxygen sensor heater service bay test
GEN MOTORS CORP11 citations68
US7069911B1Jul 4, 2006
Apparatus and methods for protecting a catalytic converter from misfire
GEN MOTORS CORP4 citations57
GM GLOBAL TECH OPERATIONS INC
4 patentsUS8055400B2Nov 8, 2011
Control system and method for filtering dependent diagnostic trouble codes
GM GLOBAL TECH OPERATIONS INC10 citations84
US9047722B2Jun 2, 2015
Vehicle location and fault diagnostic systems and methods
GM GLOBAL TECH OPERATIONS INC19 citations80
US8041478B2Oct 18, 2011
Securing and diagnosing the vehicle speed input and direction for torque control systems
GM GLOBAL TECH OPERATIONS INC2 citations59
US7826963B1Nov 2, 2010
Diagnostic system for spark ignition direct injection system control circuits
GM GLOBAL TECH OPERATIONS INC0 citations41