One of the dominant market trends in Europe has been the growth in diesel engines for passenger cars. This success has been achieved by enhancing vehicle driveability, refinement and fuel consumption. The combination of increased competition between vehicle manufacturers and more stringent legislative demands is driving further developments. For sales growth and increased product appeal, the key to success will be the optimum application of technologies that balance the conflicting pressures in engine development. To meet this challenge, Ricardo has developed an integrated approach to target the most cost-effective route compatible with future emissions and fuel consumption, or CO2, requirements. These requirements must also be met without compromise in performance, refinement or driveability attributes. This paper summarises the development progress towards future European and US emissions passenger car and light duty vehicles legislation. In addition the importance of three critical development processes; advanced combustion system design, Design of Experiment (DoE) techniques and Control and Electronics development techniques will be emphasised. The integrated approach is also designed to deliver improved and robust results with accelerated project delivery and product development cycles. The results reported in the paper have led to the following conclusions: Engine technology is developing to enable NOx reduction at source. This will minimise the future requirement for NOx reducing aftertreatment and the cost impact of meeting future emissions requirements. By 2007, Bin 5 emissions will be achieved through the application of Level 2 ACTION technology in combination with 60-70% NOx reducing aftertreatment. Service interval refill of Urea becomes practical with SCR systems. Technology will advance to enable Tier 2 Bin 5 emissions without NOx aftertreatment in LDV (Light Duty Vehicle) applications. Reduced compression ratio combustion system, advanced air/EGR (Exhaust Gas Recirculation) system and combustion control will be key enabling technologies. Diesel engines are becoming more complex and the workload to deliver calibration programmes is increasing. Despite this, advanced development techniques are accelerating project delivery. Developments in simulation and combustion design techniques are reduced engine testing requirements. Advanced design of experiment techniques is enabling both an improved optimum to be achieved in combination with reduced testing duration. Advanced SIL and HIL techniques are minimising the development time in regard to control and electronics system developments. This is particularly important in regard to new closed loop combustion control strategies and OBD strategy development.
Advanced development techniques for delivering low emissions diesel engines
Fortgeschrittene Entwicklungstechniken für die Schaffung von Niedrigemissionsdieselmotoren
2006
14 Seiten, 22 Bilder, 1 Tabelle, 11 Quellen
Conference paper
English
Dieselmotor , Emissionsminderung , Produktentwicklung , Pkw (Personenkraftwagen) , Kraftstoffverbrauch , Wettbewerb , gesetzliche Regelung , Kohlendioxid , Fahrverhalten , Verbrennung (Oxidation) , Versuchsplanung , elektronische Steuerung , Stickoxid , Nachbehandlung , Verdichtungsverhältnis , Abgasrückführung
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