Gas Exchange Optimization and the Impact on Emission Reduction for HSDI Diesel Engines 2009-01-0653
The main tasks for all future powertrain developments are: regulated emissions, CO2-values, comfort, good drivability, high reliability and affordable costs.
One widely discussed approach for fuel consumption improvement within passenger car applications, is to incorporate the downsizing effect. To attain constant engine performance an increase of boost pressure and/or rated speed is mandatory. In both cases, the mass flow rate through the intake and exhaust ports and valves will rise. In this context, the impact of the port layout on the system has to be reassessed.
In this paper, the impact of the port layout on a modern diesel combustion system will be discussed and a promising concept shall be described in detail. The investigations shown include flow measurements, PIV measurements of intake flow, CFD simulations of the flow field during intake and results from the thermodynamic test bench. One of the important topics is to prove the impact of the flow quality on the combustion.
Based on these investigations, a new port concept shall be presented, which uses a variable valve lift to provide a highly variable swirl, a homogenous flow field in the cylinder and excellent flow coefficients, in order to increase the volumetric efficiency in combination with reduced flow losses.
Citation: Adolph, D., Rezaei, R., Pischinger, S., Adomeit, P. et al., "Gas Exchange Optimization and the Impact on Emission Reduction for HSDI Diesel Engines," SAE Technical Paper 2009-01-0653, 2009, https://doi.org/10.4271/2009-01-0653. Download Citation
Author(s):
Dirk Adolph, Reza Rezaei, Stefan Pischinger, Philipp Adomeit, Thomas Körfer, Andreas Kolbeck, Matthias Lamping, Marek Tatur, Dean Tomazic
Affiliated:
Institute for Combustion Engines, RWTH Aachen University, FEV Motorentechnik GmbH, FEV Inc.
Pages: 13
Event:
SAE World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Combustion and Flow Diagnostics and Fundamental Advances in Thermal and Fluid Sciences, 2009-SP-2238
Related Topics:
Boost pressure
Combustion and combustion processes
Fuel consumption
Powertrains
Engine cylinders
Computational fluid dynamics
Optimization
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