Technical Paper
Combined steady state and transient optimization for dynamic smoke reduction on Heavy Duty engine (TIER3 Applications)
2007-09-16
2007-24-0055
This paper describes a methodology to investigate the whole set of engine performance requested by off-road vehicles in order to define many sub-ratings with different speed and load ranges: DoE screening for parameter range evaluation on the whole map DoE with Map border lines Boundary conditions to get reliable test results Raw data plausibility Modeling based on torque / injected quantity Optimization (TIER3 calibrations) and Verifications Development decisions / Map calculations The method has been tested on real case: NEF 6 cylinder Common Rail aftercooled engine with internal EGR and free floating turbocharger where also the intake manifold temperature is a DoE parameter able to simulate different customer cooler solutions. Particular attention has been dedicated to the prediction of fuel consumption as well as NOx, HC and smoke emissions.
