Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2011-04-26
2011-04-26
Tran, Binh Q (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S274000, C060S276000, C060S285000, C060S290000
Reexamination Certificate
active
07930876
ABSTRACT:
A device for monitoring an operating mode of an element used for aftertreatment of exhaust gases from an internal combustion engine and to an associated method. The device includes a controller configured to receive a signal that represents a characteristic magnitude of the exhaust gases downstream of the exhaust gas aftertreatment element. In addition, the controller can receive a signal that represents engine deceleration and is configured to increment a deceleration counter with each deceleration. The controller also includes a failure counter that is incremented when a variation in the above-mentioned measured magnitude is detected during a deceleration, the controller establishing a diagnostic criterion that is a function of the two counters. The controller triggers a fault signal if the diagnostic criterion exceeds programmed limits.
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Leprieur Laurent
Thouvenel Nicolas
Bogue Jesse
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Renault S.A.S.
Tran Binh Q
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