FEV HiFORS: A new passenger car Diesel injector with continuous rate shaping for 2500 bar injection pressure

• Autorzy: Grzeschik P. , Laumen H.-J.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the HiFORS continuously rate shaping injector for injection pressures of 2500 bar and above developed by FEVGmbH and the Institute for Combustion Engines, RWTH Aachen University. The development process from concept definition to hydraulic and deisgn layout, material choice and manufacturing is discussed. The hydraulic operating properties are verified by injection test rig investigations. Optical investigations are conducted in an optically accessible high pressure, high temperature chamber using shadowgraphy and OH chemoluminescence detection, thereby capturing both liquid and gaseous penetration as well as combustion areas. Single cylinder investigations are carried out at a 0.4 dm³ research engine in different operating points from low part load to full load. Compared to a serial production piezo injector, base measurements using conventional square injection profiles already show reduced combustion noise at improved NO_x-soot trade-off as well as lowered HC and CO emissions. Detailed investigations at part load operating points explore the potential of different continuous rate shaping patterns, while the injector’s high injection pressure capability of up to 2500 bar and its influence on engine performance is tested at full load operation points.

Słowa kluczowe

EN

diesel injection system; injection hydraulics; mixture formation

PL

system wtryskowy; diesel; hydraulika wtrysku

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2014
• Tom: R. 53, nr 2
• Strony: 36--44
• Opis fizyczny: Bibliogr. 10 poz. il., tab., wykr.

Twórcy

autor

Grzeschik P.

• Institute for Combustion Engines, RWTH Aachen University

autor

Laumen H.-J.

• FEV GmbH

Bibliografia

• [1] Matsumoto S. et al.: Der neue Diesel-Magnetventil-Injektor von Denso. In: MTZ – Motortechnische Zeitschrift 74 (2) (pp. 146-150), 2013.
• [2] Predelli O. et al.: Kontinuierliche Einspritzverlaufsformung in Pkw-Dieselmotoren – Potenziale, Grenzen und Realisierungschancen. In: 31. Internationales Wiener Motorensymposium, Vienna 2010.
• [3] Herrmann O.E. et al.: Ultra High Pressure Fuel Injection for minimized Engine-Out Emissions of HD Diesel Engines. In: Diesel and Gasoline Direct Injection VI, Berlin 2010.
• [4] Rottmann M.: Einspritzratenformung am schnelllaufenden DI-Dieselmotor. PhD thesis, RWTH Aachen 2011.
• [5] Hinkelbein J.: Entwicklung einer Verbrennungscharakteristikregelung mittels Einspritzverlaufsmodulation bei direkteinspritzenden Dieselmotoren. PhD thesis, RWTH Aachen 2010.
• [6] Kremer F. et al.: Verbrennungsratenregelung – Baustein zur weiteren Komfortsteigerung CO2-optimierter Dieselmotoren. In: Engine Combustion Processes X, Munich 2011.
• [7] Laumen H.-J. et al.: Flexible Einspritzverlaufsformung - Auch bei PKW-Dieselmotoren ein wirkungsvolles Mittel zur Reduzierung von Verbrauch und Schadstoffemissionen? In: Diesel and Gasoline Direct Injection IV, Berlin 2006.
• [8] Graziano B. et al.: Investigation on the Ignition Sensitivity of 2-MTHF, Heptane and Di-n-butylether. In: Proceedings of the European Combustion Meeting 2013, Lund 2013.
• [9] Siebers D.L.: Scaling Liquid-Phase Fuel Penetration in Diesel Sprays based on Mixing-Limited Vaporization. SAE Technical Paper Series 1999-01-0528, 1999.
• [10] Schnorbus T.G.: Zylinderdruckgeführtes Einspritzmanagement beim Dieselmotor. PhD thesis, RWTH Aachen University 2010.