Inventor
SIEKKINEN JOHN W
US24 patents
⚠️ This page may combine multiple inventors who share the name “SIEKKINEN JOHN W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GM GLOBAL TECH OPERATIONS INC
9 patentsUS7873464B2Jan 18, 2011
Block heater usage detection and coolant temperature adjustment
GM GLOBAL TECH OPERATIONS INC10 citations82
US7467628B2Dec 23, 2008
Oxygen sensor heater control methods and systems
GM GLOBAL TECH OPERATIONS INC14 citations82
US7921705B2Apr 12, 2011
Engine coolant temperature estimation system
GM GLOBAL TECH OPERATIONS INC12 citations81
US9297843B2Mar 29, 2016
Fault diagnostic systems and methods using oxygen sensor impedance
GM GLOBAL TECH OPERATIONS INC15 citations80
US8046150B2Oct 25, 2011
Engine cooling system diagnostic for applications with two coolant sensors
GM GLOBAL TECH OPERATIONS INC10 citations79
US7968827B2Jun 28, 2011
Oxygen sensor heater control strategy
GM GLOBAL TECH OPERATIONS INC6 citations61
US7881859B2Feb 1, 2011
Torque converter clutch control system and post oxygen sensor performance diagnostic system
GM GLOBAL TECH OPERATIONS INC2 citations60
US8014930B2Sep 6, 2011
System and method for determining oxygen sensor heater resistance
GM GLOBAL TECH OPERATIONS INC4 citations53
US9146177B2Sep 29, 2015
System and method for diagnosing a fault in an oxygen sensor based on engine speed
GM GLOBAL TECH OPERATIONS INC1 citations50
ANILOVICH IGOR
4 patentsUS8086392B2Dec 27, 2011
Post oxygen sensor performance diagnostic with minimum air flow
ANILOVICH IGOR11 citations83
US8583349B2Nov 12, 2013
Systems and methods for diagnosing oxygen sensors and catalytic converters of exhaust systems
ANILOVICH IGOR16 citations82
US8620516B2Dec 31, 2013
System and method for performing engine material temperature sensor diagnostics
ANILOVICH IGOR5 citations71
US9151211B2Oct 6, 2015
Method of monitoring an engine coolant system of a vehicle
ANILOVICH IGOR4 citations69
GM GLOBAL TECH OPERATIONS LLC
4 patentsUS10202958B2Feb 12, 2019
System and method for controlling ultra-capacitor charge and discharge in vehicles with auto start/stop systems
GM GLOBAL TECH OPERATIONS LLC3 citations70
US10060985B2Aug 28, 2018
System and method for monitoring temperatures of components of an ultra-capacitor system used with an auto start/stop system
GM GLOBAL TECH OPERATIONS LLC6 citations70
US10026238B2Jul 17, 2018
System and method for converting two diagnostic states of a controller to three diagnostic states
GM GLOBAL TECH OPERATIONS LLC3 citations70
US10190481B2Jan 29, 2019
Minimum power consumption for cool down diagnostic based on cylinder deactivation
GM GLOBAL TECH OPERATIONS LLC2 citations69
LEVIJOKI STEPHEN PAUL
3 patentsUS8939010B2Jan 27, 2015
System and method for diagnosing faults in an oxygen sensor
LEVIJOKI STEPHEN PAUL1 citations48
US9103267B2Aug 11, 2015
Low coolant temperature fault diagnostic systems and methods
LEVIJOKI STEPHEN PAUL1 citations45
US9181844B2Nov 10, 2015
Diagnostic system and method for an oxygen sensor positioned downstream from a catalytic converter
LEVIJOKI STEPHEN PAUL0 citations38