Mack Trucks, Inc.

Patrik Bergh

Johan Dahl

Heath Morris

Jeffrey A Brooks

A method is provided of operating a diesel engine having an exhaust aftertreatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS, selecting an operating mode from among the plurality of operating modes so that exhaust exiting the EATS contains NOX at no more than a predetermined NOX level and a least amount of fuel is consumed per unit energy; and operating the engine in the selected operating mode. An engine arrangement is also provided.

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Järved, Sweden

Patrik Bergh