Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Reexamination Certificate
2006-06-27
2006-06-27
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
C123S090150
Reexamination Certificate
active
07066160
ABSTRACT:
An engine ECU of a failure diagnosis system for an EGR device fixes a VVT to a most retarded position upon establishment of a failure monitor condition of the EGR device, starts the EGR device, measures an actual intake pipe pressure PMON upon elapse of a predetermined time after start of EGR device, stops the EGR device, measures an actual intake pipe pressure PMOFF upon elapse of a predetermined time after stop of EGR device, and determines that the EGR device is normally operated when a value obtained by subtracting the actual PMOFF in OFF state of the EGR device from the actual PMON in ON state of the EGR device is larger than a predetermined judgment value.
REFERENCES:
patent: 5488938 (1996-02-01), Ohuchi
patent: 5513616 (1996-05-01), Matsumoto et al.
patent: 6389804 (2002-05-01), Yasui et al.
patent: 6390077 (2002-05-01), Simpson et al.
patent: 6564778 (2003-05-01), Isobe et al.
patent: 6609059 (2003-08-01), Kawaguchi et al.
patent: 6748936 (2004-06-01), Kinomura et al.
patent: 6848418 (2005-02-01), Summers et al.
patent: (A) 05001624 (1993-01-01), None
patent: (A) 07004320 (1995-01-01), None
Gimie Mahmoud
Toyota Jidosha & Kabushiki Kaisha
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