Inventor
WAKAHARA KEIJI
JP41 patents
⚠️ This page may combine multiple inventors who share the name “WAKAHARA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
39 patentsUS6898927B2May 31, 2005
Emission control system with catalyst warm-up speeding control
DENSO CORP99 citations97
US6279390B1Aug 28, 2001
Thermostat malfunction detecting system for engine cooling system
DENSO CORP73 citations97
US6725710B2Apr 27, 2004
Thermostat malfunction detecting system for engine cooling system
DENSO CORP23 citations96
US6679110B2Jan 20, 2004
Thermostat malfunction detecting system for engine cooling system
DENSO CORP32 citations96
US6386022B1May 14, 2002
Thermostat malfunction detecting system for engine cooling system
DENSO CORP28 citations96
US5728941AMar 17, 1998
Misfire detecting apparatus using difference in engine rotation speed variance
DENSO CORP60 citations96
US7743651B2Jun 29, 2010
Method for detecting malfunction of a cooling system based on detected coolant temperature
DENSO CORP12 citations93
US7363804B2Apr 29, 2008
Method for detecting malfunction of a cooling system based on detected coolant temperature
DENSO CORP12 citations93
US7316223B2Jan 8, 2008
Device for detecting malfunction in evaporated gas purging system
DENSO CORP32 citations93
US7010967B2Mar 14, 2006
Thermostat malfunction detecting system for engine cooling system
DENSO CORP12 citations93
US6904792B2Jun 14, 2005
Abnormality diagnosing apparatus for vehicle
DENSO CORP24 citations93
US6665608B2Dec 16, 2003
Coolant temperature estimation system for estimating temperature of coolant of internal combustion engine
DENSO CORP19 citations93
US6892712B2May 17, 2005
Leak check for fuel vapor purge system
DENSO CORP27 citations92
US6832509B2Dec 21, 2004
Fuel vapor control system with leak check
DENSO CORP22 citations92
US6807851B2Oct 26, 2004
Leak-check apparatus of fuel-vapor-processing system, fuel-temperature estimation apparatus and fuel-temperature-sensor diagnosis apparatus
DENSO CORP44 citations92
US6148803ANov 21, 2000
Leakage diagnosing device for fuel evaporated gas purge system
DENSO CORP37 citations92
US6082337AJul 4, 2000
Abnormality detection apparatus for preventing fuel gas emission
DENSO CORP43 citations92
US6047674AApr 11, 2000
Valve timing control apparatus for internal combustion engine
DENSO CORP27 citations92
US7146851B2Dec 12, 2006
Diagnostic apparatus for variable valve control system
DENSO CORP46 citations89
US6968268B2Nov 22, 2005
Misfire detector for an internal combustion engine
DENSO CORP39 citations89
US6085706AJul 11, 2000
Valve timing control apparatus for internal combustion engine
DENSO CORP20 citations89
US7757649B2Jul 20, 2010
Controller, cooling system abnormality diagnosis device and block heater determination device of internal combustion engine
DENSO CORP14 citations84
US7483781B2Jan 27, 2009
Engine control apparatus
DENSO CORP18 citations84
US7356985B2Apr 15, 2008
Air-fuel ratio controller for internal combustion engine
DENSO CORP18 citations84
US7168399B2Jan 30, 2007
Abnormality diagnosis apparatus and engine cooling system having the same
DENSO CORP16 citations84
US6637416B2Oct 28, 2003
Diagnosis apparatus for detecting abnormal state of evaporation gas purge system
DENSO CORP13 citations84
US6957570B2Oct 25, 2005
Thermostat malfunction detecting system for engine cooling system
DENSO CORP11 citations82
US7140241B2Nov 28, 2006
Leak-check apparatus of fuel-vapor-processing system, fuel-temperature estimation apparatus and fuel-temperature-sensor diagnosis apparatus
DENSO CORP10 citations74
US7137295B2Nov 21, 2006
Thermostat malfunction detecting system for engine cooling system
DENSO CORP4 citations74
US7047799B2May 23, 2006
Thermostat malfunction detecting system for engine cooling system
DENSO CORP6 citations74
US7024926B2Apr 11, 2006
Thermostat malfunction detecting system for engine cooling system
DENSO CORP3 citations74
US6564782B2May 20, 2003
Device for detecting canister deterioration
DENSO CORP8 citations74
US7409284B2Aug 5, 2008
Apparatus for estimating air-fuel ratios and apparatus for controlling air-fuel ratios of individual cylinders in internal combustion engine
DENSO CORP3 citations63
US7397148B2Jul 8, 2008
Vehicular anomaly diagnosis system
DENSO CORP2 citations63
US7260928B2Aug 28, 2007
Diagnostic device for secondary air supply system
DENSO CORP2 citations63
USRE41823EOct 19, 2010
Leak check for fuel vapor purge system
DENSO CORP4 citations62
USRE41660ESep 14, 2010
Fuel vapor control system with leak check
DENSO CORP3 citations62
US6854452B2Feb 15, 2005
Fuel vapor handling system
DENSO CORP3 citations62
US7797924B2Sep 21, 2010
Abnormality diagnosis apparatus for secondary air supply system of engine
DENSO CORP0 citations41