Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1996-11-20
1998-06-30
Argenbright, Tony M.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 60286, 60297, 60301, F02D 4114, F01N 318, F01N 320
Patent
active
057716862
ABSTRACT:
A method and an apparatus are provided for operating a diesel engine with an exhaust feedback device located between the exhaust line and the intake air line, with an adjusting element that can be operated by an adjusting drive actuated by an auxiliary force to operate the exhaust feedback device as a function of signals from an electronic control device. An engine regulator permits rich/lean regulation of the diesel engine as a function of its operating parameters. A storage catalyst is located in the exhaust line, in which catalyst oxides of nitrogen (NO.sub.x) can be adsorbed, desorbed, and reduced. A sensor is located downstream from the storage catalyst for detecting the NO.sub.x concentration in the exhaust stream in such fashion that when an NO.sub.x storage threshold value is reached that varies in terms of its characteristics as a function of the rpm and the load, a switch is made from operation with a lambda value of larger than 1 to operation with a lambda value of less than 1.
REFERENCES:
patent: 5404719 (1995-04-01), Araki
patent: 5457958 (1995-10-01), Boegner
patent: 5473887 (1995-12-01), Takeshima
patent: 5483795 (1996-01-01), Katoh et al.
patent: 5609022 (1997-03-01), Cho
Boegner Walter
Krutzsch Bernd
Pfaff Rudiger
Pischinger Stefan
Schon Christof
Argenbright Tony M.
Mercedes-Benz AG
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