Measuring and testing – Internal combustion engine or related engine system or... – Testing of an individual engine part
Reexamination Certificate
2011-04-12
2011-04-12
Kirkland, III, Freddie (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Testing of an individual engine part
C123S090150, C123S090160
Reexamination Certificate
active
07921711
ABSTRACT:
To an electronic control unit is connected a shaft position detection sensor that outputs, as a shaft position detection value, a signal whose magnitude changes stepwise by a predetermined amount in correspondence with the position of a control shaft of a valve characteristics change mechanism. The electronic control unit stores in advance, as a determination reference value, the drive amount of an actuator at the time when the magnitude of the shaft position detection value changes. The electronic control unit performs normality determination to indicate that the valve characteristics change mechanism is operating normally when the drive amount at the time when the shaft position detection value changes along with driving of the actuator and the determination reference value correspond to each other, and performs abnormality determination to indicate that an abnormality is occurring in the valve characteristics change mechanism when the drive amount and the determination reference value do not correspond to each other.
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Gifford Krass Sprinkle Anderson & Citkowski P.C.
Kirkland, III Freddie
Toyota Jidosha & Kabushiki Kaisha
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