Combination of selected opioids with other active substances...

Details Combination of selected opioids with other active substances... Combination of selected opioids with other active substances...

2007-07-24

2007-07-24

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S276000, C060S286000, C060S297000

Reexamination Certificate

active

10545901

ABSTRACT:
An internal combustion engine control device for, in a lean-burn internal combustion engine provided with a three-way catalyst and a lean NOx catalyst in an exhaust system, optimizing an air/fuel ratio in a rich mode from the viewpoints of both better fuel economy and exhaust emission control when NOx having been stored in a lean NOx catalyst during a lean operation is desorbed and cleaned by switching to a rich operation.An internal combustion engine control device for controlling an air/fuel ratio during the rich operation to be changed between a period of desorbing O2stored in the three-way catalyst and a period of desorbing and cleaning NOx stored in the lean NOx catalyst.

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