Inventor
OSAWA KOUICHI
JP18 patents
⚠️ This page may combine multiple inventors who share the name “OSAWA KOUICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOYOTA MOTOR CO LTD
16 patentsUS5295472AMar 22, 1994
Apparatus for detecting malfunction in evaporated fuel purge system used in internal combustion engine
TOYOTA MOTOR CO LTD113 citations97
US5088281AFeb 18, 1992
Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system
TOYOTA MOTOR CO LTD111 citations95
US5027784AJul 2, 1991
PCV system with a check valve device
TOYOTA MOTOR CO LTD71 citations95
US4949695AAug 21, 1990
Device for detecting malfunction of fuel evaporative purge system
TOYOTA MOTOR CO LTD108 citations95
US5309756AMay 10, 1994
Device for determining malfunction of an engine cylinder
TOYOTA MOTOR CO LTD47 citations92
US5287737AFeb 22, 1994
Device for determining misfiring of a cylinder of a multicylinder engine
TOYOTA MOTOR CO LTD26 citations92
US5088318AFeb 18, 1992
Determining device for determining a failure in an engine cylinder
TOYOTA MOTOR CO LTD38 citations92
US4930479AJun 5, 1990
Irregular combustion determining device for an internal combustion engine
TOYOTA MOTOR CO LTD43 citations92
US5230319AJul 27, 1993
Apparatus for detecting malfunction in evaporated fuel purge system
TOYOTA MOTOR CO LTD30 citations90
US5243949ASep 14, 1993
Diagnostic device for exhaust gas recirculation device
TOYOTA MOTOR CO LTD13 citations73
US4981122AJan 1, 1991
Fuel injection control device of an engine
TOYOTA MOTOR CO LTD7 citations73
US4976242ADec 11, 1990
Fuel injection control device of an engine
TOYOTA MOTOR CO LTD7 citations73
US4915078AApr 10, 1990
Fuel injection control device of an internal combustion engine
TOYOTA MOTOR CO LTD10 citations73
US5313925AMay 24, 1994
Apparatus for detecting malfunction in fuel evaporative prurge system
TOYOTA MOTOR CO LTD11 citations71
US4991559AFeb 12, 1991
Fuel injection control device of an engine
TOYOTA MOTOR CO LTD8 citations71
US5018494AMay 28, 1991
Idling speed control device of an engine
TOYOTA MOTOR CO LTD4 citations62