System for providing assistance in regenerating a NOx trap

Details System for providing assistance in regenerating a NOx trap System for providing assistance in regenerating a NOx trap

2006-06-13

2006-06-13

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S285000

Reexamination Certificate

active

07059121

ABSTRACT:
A system for providing assistance in regenerating a storage/destorage NOx trap integrated in an exhaust system of a motor vehicle engine, comprising means for controlling the operation of means for injecting fuel into the cylinders of the engine to cause the engine to switch from a standard mode of operation during which NOx is stored in the trap to a regeneration mode in which NOx is destored from the trap and the trap is regenerated, the system including two λ probes placed at equal distances from the NOx trap downstream therefrom in the exhaust system, the outputs from the probes being connected to differential measurement means for measuring the output signals from the probes in order to determine the quantity of NOx in the exhaust gas so as to cause the control means to trigger a stage of regenerating the trap when the measurement exceeds a predetermined threshold.

REFERENCES:
patent: 4362605 (1982-12-01), Bozon et al.
patent: 198 27 469 (1999-01-01), None
patent: 0 814 248 (1997-12-01), None
patent: WO 00/71870 (2000-11-01), None
patent: WO 01/53672 (2001-07-01), None

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