METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, PARTICULARLY OF A MOTOR VEHICLE

WIPO Patent Application WO2004097193

A3

The invention relates to a method for operating an internal combustion engine (10), particularly of a motor vehicle. According to the invention, a lean air/fuel mixture is combusted inside a combustion chamber. Nitrogen oxide contained in the exhaust gas is stored in a storage-type catalytic converter (21). An energy storage efficiency at which the storage-type catalytic converter (21) stores nitrogen oxide contained in the exhaust gas is determined, and the energy storage efficiency is determined on the basis of on an actual spatial velocity of the exhaust gases inside the storage-type catalytic converter (21). Two efficiencies are determined at least on the basis of the temperature of the storage-type catalytic converter (21) and on the basis of a spatial velocity. One of the two efficiencies is determined for a high spatial velocity and the other efficiency is determined for a low spatial velocity. The storage efficiency is determined from both efficiencies on the basis of the actual spatial velocity.

PFAEFFLE ANDREAS (DE)
KLENK WOLFGANG (DE)
SCHERER STEFAN (DE)
NEUBERTH SIMONE (DE)
SCHWADERER ALBRECHT (DE)

PCT/EP2004/050451

February 17, 2005

April 06, 2004

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BOSCH GMBH ROBERT (DE)
PFAEFFLE ANDREAS (DE)
KLENK WOLFGANG (DE)
SCHERER STEFAN (DE)
NEUBERTH SIMONE (DE)
SCHWADERER ALBRECHT (DE)

F01N11/00; F01N13/00; F02D41/02; F01N3/08; (IPC1-7): F02D41/14; F02D41/02

DE19926305A1	2000-12-21
DE10038461A1	2002-03-14
US20020144501A1	2002-10-10

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