Inventor
TAKAKU YUTAKA
JP53 patents
⚠️ This page may combine multiple inventors who share the name “TAKAKU YUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
48 patentsUS5964811AOct 12, 1999
Control method and apparatus for diagnosing vehicles
HITACHI LTD94 citations98
US6520142B2Feb 18, 2003
Engine control system for controlling in-cylinder fuel injection engine
HITACHI LTD56 citations96
US6105556AAug 22, 2000
Evaporative system and method of diagnosing same
HITACHI LTD51 citations96
US6089016AJul 18, 2000
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD30 citations96
US6085132AJul 4, 2000
Control method and apparatus for diagnosing vehicles
HITACHI LTD44 citations96
US5802843ASep 8, 1998
Method and apparatus for diagnosing engine exhaust gas purification system
HITACHI LTD83 citations96
US5575265ANov 19, 1996
Diagnostic method for evaporated fuel gas purging system
HITACHI LTD74 citations96
US5241480AAug 31, 1993
Method and apparatus for detecting combustion conditions in multicylinder internal combustion engine based upon engine speed evaluation
HITACHI LTD71 citations96
US5743085AApr 28, 1998
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD27 citations94
US7409275B2Aug 5, 2008
Vehicle diagnostic system
HITACHI LTD21 citations93
US7117664B2Oct 10, 2006
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD17 citations93
US6502549B1Jan 7, 2003
Engine combustion control device
HITACHI LTD26 citations93
US6330510B1Dec 11, 2001
Diagnosing system for engine
HITACHI LTD22 citations93
US6305361B1Oct 23, 2001
Evaporative system and method of diagnosing same
HITACHI LTD37 citations93
US5921078AJul 13, 1999
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD17 citations93
US5617722AApr 8, 1997
Exhaust control device of internal combustion engine
HITACHI LTD41 citations93
US5485374AJan 16, 1996
Combustion-conditon diagnostic system and method for a multicylinder engine
HITACHI LTD43 citations93
US6502388B2Jan 7, 2003
Engine exhaust gas cleaning system
HITACHI LTD28 citations92
US6470868B2Oct 29, 2002
Engine self-diagnosis apparatus and control apparatus
HITACHI LTD24 citations92
US6383267B1May 7, 2002
Exhaust gas cleaning system for an engine
HITACHI LTD29 citations92
US6357224B1Mar 19, 2002
Engine exhaust gas purifying apparatus
HITACHI LTD36 citations92
US6343500B1Feb 5, 2002
Engine combustion condition detecting apparatus equipped with malfunction diagnosing apparatus
HITACHI LTD19 citations92
US6089080AJul 18, 2000
Diagnosis apparatus for evaporation system
HITACHI LTD29 citations92
US6003309ADec 21, 1999
Diagnostic apparatus for exhaust gas clarification apparatus for internal combustion engine
HITACHI LTD40 citations92
US5945828AAug 31, 1999
Engine combustion condition detecting apparatus equipped with malfunction diagnosing apparatus
HITACHI LTD21 citations92
US5765540AJun 16, 1998
Method of diagnosing an evaporative system
HITACHI LTD22 citations92
US5758491AJun 2, 1998
Diagnosing system and method of catalytic converter for controlling exhaust gas of internal combustion engine
HITACHI LTD25 citations92
US5740676AApr 21, 1998
Diagnostic apparatus for exhaust gas clarification apparatus for internal combustion engine
HITACHI LTD32 citations92
US5557933ASep 24, 1996
Malfunction diagnosis apparatus for internal combustion engine
HITACHI LTD30 citations92
US5400592AMar 28, 1995
Diagnostic apparatus for catalytic converter of an internal combustion engine
HITACHI LTD47 citations92
US5341642AAug 30, 1994
System for diagnosing engine exhaust gas purifying device and system for diagnosing sensor
HITACHI LTD42 citations92
US4779597AOct 25, 1988
Fail-safe system for vehicle engine
HITACHI LTD31 citations92
US6807806B2Oct 26, 2004
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD13 citations90
US6330795B1Dec 18, 2001
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD21 citations90
US7976427B2Jul 12, 2011
Vehicle control apparatus and vehicle equipped with the control apparatus
HITACHI LTD18 citations84
US7956560B2Jun 7, 2011
Control apparatus for rotational electric machine and driving apparatus for vehicle
HITACHI LTD7 citations84
US6883307B2Apr 26, 2005
Diagnosis apparatus for internal combustion engine
HITACHI LTD13 citations84
US6523340B1Feb 25, 2003
Method and apparatus for diagnosing engine exhaust gas purification system
HITACHI LTD18 citations84
US6092368AJul 25, 2000
Function diagnostic system for an exhaust gas purifying apparatus in an internal combustion engine
HITACHI LTD19 citations84
US6725709B2Apr 27, 2004
Combustion state diagnosing system and combustion state diagnosing method for diagnosing engine and recording medium
HITACHI LTD8 citations74
US6520168B2Feb 18, 2003
Air-fuel ratio controller for engine
HITACHI LTD12 citations74
US6430495B2Aug 6, 2002
Diagnosing system for engine
HITACHI LTD12 citations74
US6408617B1Jun 25, 2002
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD7 citations74
US6061624AMay 9, 2000
Multi-cylinder engine combustion state diagnosis apparatus and method
HITACHI LTD14 citations74
US6050087AApr 18, 2000
Method and apparatus for diagnosing engine exhaust gas purification system
HITACHI LTD14 citations74
US6907341B2Jun 14, 2005
Misfire detector
HITACHI LTD10 citations73
US7389637B2Jun 24, 2008
Diagnostic equipment for an exhaust gas cleaning apparatus
HITACHI LTD2 citations63
US6324836B1Dec 4, 2001
Apparatus and method for controlling air-to-fuel ratio in engine
HITACHI LTD4 citations63
KOBE STEEL LTD
1 patentSANNOHASHI CORP
1 patentShowing the top 50 of 53 patents by PatentIndex Score.