Method and device for monitoring a particle filter in the...

Details Method and device for monitoring a particle filter in the... Method and device for monitoring a particle filter in the...

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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U.S. Appl. No. 12/067,311, filed Mar. 19, 2008, Ploton, et al.

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