Inventor
YAMASHITA YUKIHIRO
JP76 patents
⚠️ This page may combine multiple inventors who share the name “YAMASHITA YUKIHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
34 patentsUS6898927B2May 31, 2005
Emission control system with catalyst warm-up speeding control
DENSO CORP99 citations97
US6244046B1Jun 12, 2001
Engine exhaust purification system and method having NOx occluding and reducing catalyst
DENSO CORP80 citations96
US6148612ANov 21, 2000
Engine exhaust gas control system having NOx catalyst
DENSO CORP53 citations96
US5964208AOct 12, 1999
Abnormality diagnosing system for air/fuel ratio feedback control system
DENSO CORP53 citations96
US5852228ADec 22, 1998
Apparatus and method for controlling oxygen sensor heating
DENSO CORP49 citations96
US7200988B2Apr 10, 2007
Air-fuel ratio control system and method
DENSO CORP33 citations93
US6539707B2Apr 1, 2003
Exhaust emission control system for internal combustion engine
DENSO CORP45 citations93
US6382188B2May 7, 2002
Fuel injection control system of internal combustion engine
DENSO CORP30 citations93
US6311482B1Nov 6, 2001
Air-fuel ratio control apparatus for internal combustion engines
DENSO CORP51 citations93
US6094975AAug 1, 2000
Heater control having capability of restoring normal heater power supply after detection of abnormality
DENSO CORP29 citations93
US5974857ANov 2, 1999
Apparatus and method for controlling oxygen sensor heating
DENSO CORP32 citations93
US8001799B2Aug 23, 2011
Multiple cooling sources for a vehicle air conditioning system
DENSO CORP32 citations92
US7459801B2Dec 2, 2008
Control apparatus for selectively controlling output current and output voltage of electric generator
DENSO CORP20 citations92
US7347184B2Mar 25, 2008
Controller and controlling method for internal combustion engine
DENSO CORP17 citations92
US7248960B2Jul 24, 2007
Air-fuel ratio sensor monitor, air-fuel ratio detector, and air-fuel ratio control
DENSO CORP18 citations92
US6976382B2Dec 20, 2005
Abnormality diagnosing apparatus of exhaust gas sensor
DENSO CORP35 citations92
US6600998B1Jul 29, 2003
Catalyst deteriorating state detecting apparatus
DENSO CORP24 citations92
US6560959B2May 13, 2003
Exhaust gas purification apparatus of internal combustion engine
DENSO CORP32 citations92
US6438946B1Aug 27, 2002
Exhaust gas purification device for engines
DENSO CORP25 citations92
US6341599B1Jan 29, 2002
Power supply control system for heater used in gas concentration sensor
DENSO CORP37 citations92
US6258232B1Jul 10, 2001
Gas component concentration measuring apparatus
DENSO CORP53 citations92
US6223730B1May 1, 2001
Fuel injection control system of internal combustion engine
DENSO CORP40 citations92
US6164125ADec 26, 2000
Detection of malfunction in gas concentration detection system
DENSO CORP49 citations92
US6032659AMar 7, 2000
Abnormality diagnosing system for air/fuel ratio feedback control system
DENSO CORP45 citations92
US7040307B2May 9, 2006
System for diagnosing degradation of air-fuel sensor
DENSO CORP25 citations91
US6085518AJul 11, 2000
Air-fuel ratio feedback control for engines
DENSO CORP23 citations91
US7710068B2May 4, 2010
Electrical power supply system for motor vehicle
DENSO CORP18 citations84
US7571712B2Aug 11, 2009
Controller and controlling method for internal combustion engine
DENSO CORP14 citations84
US7473206B2Jan 6, 2009
Engine controller and control method
DENSO CORP12 citations84
US7355292B2Apr 8, 2008
Power generation control apparatus for internal combustion engine
DENSO CORP11 citations84
US7201160B2Apr 10, 2007
Air-fuel ratio sensor monitor, air-fuel ratio detector, and air-fuel ratio control
DENSO CORP14 citations84
US10234420B2Mar 19, 2019
Gas sensor control device
DENSO CORP11 citations82
US7565942B2Jul 28, 2009
Vehicle drive control system and method
DENSO CORP11 citations77
US7291935B2Nov 6, 2007
Vehicle generator control device
DENSO CORP9 citations74
NIPPON DENSO CO
15 patentsUS5622047AApr 22, 1997
Method and apparatus for detecting saturation gas amount absorbed by catalytic converter
NIPPON DENSO CO99 citations98
US5719778AFeb 17, 1998
Heater control apparatus for oxygen sensor
NIPPON DENSO CO58 citations96
US5709198AJan 20, 1998
Oxygen concentration detecting apparatus
NIPPON DENSO CO72 citations96
US5672817ASep 30, 1997
Self-diagnostic apparatus of air-fuel ratio control system of internal combustion engine
NIPPON DENSO CO75 citations96
US5570574ANov 5, 1996
Air-fuel ratio control system for internal combustion engine
NIPPON DENSO CO82 citations96
US5845486ADec 8, 1998
Internal combustion engine exhaust gas purifier apparatus
NIPPON DENSO CO40 citations93
US5762055AJun 9, 1998
Air-to-fuel ratio control apparatus for an internal combustion engine
NIPPON DENSO CO21 citations93
US5727383AMar 17, 1998
Catalyst deterioration detecting apparatus and exhaust emission control device failure detecting apparatus
NIPPON DENSO CO25 citations93
US5579637ADec 3, 1996
Air-fuel ratio control apparatus for engine
NIPPON DENSO CO24 citations93
US6314790B1Nov 13, 2001
Oxygen concentration detecting apparatus
NIPPON DENSO CO33 citations92
US6009866AJan 4, 2000
Oxygen concentration detecting apparatus
NIPPON DENSO CO27 citations92
US5758632AJun 2, 1998
Diagnostic apparatus for air-fuel ratio sensor
NIPPON DENSO CO31 citations92
US5491975AFeb 20, 1996
Air-fuel ratio control system for internal combustion engine
NIPPON DENSO CO24 citations92
US5390491AFeb 21, 1995
Ignition timing control system for internal combustion engine
NIPPON DENSO CO22 citations92
US5353775AOct 11, 1994
Air-fuel ratio control system for internal combustion engine
NIPPON DENSO CO20 citations92
FUJI CORP
1 patentShowing the top 50 of 76 patents by PatentIndex Score.