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Unit injectors with piezo actuator for Euro 4 diesel engines

Pumpe-Düse-Einspritzelemente mit Piezo-Aktor für Euro-4-Dieselmotoren

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Diesel engines will only conform to the impending European and North American emissions limits with high performance injection systems. Together with Volkswagen, Siemens VDO Automotive has therefore developed the piezo unit injector (PUI), which allows more than 2,000 bar peak injection pressure and even more precise control of the injection process and injection quantities. The unit injector diesel engines with these PUI elements have unrivalled acoustic properties and conform to the exhaust standard Euro 4.

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  1. [1]

    Egger, K.; Warga, J.; Klügl, W.: Neues Common-Rail-Einspritzsystem mit Piezo-Aktorik für Pkw-Dieselmotoren, In MTZ 63 (2002), Nr. 9

  2. [2]

    Braess, H.-H.; Seiffert, U. (Hrsg.): Vieweg Handbuch Kraftfahrzeugtechnik, F. Vieweg/GWV Fachverlage, 3. vollst. neu bearb. u. erw. Aufl., 2003

  3. [3]

    Basshuysen, R.; Schäfer, F. (Hrsg.): Handbuch Verbrennungsmotor, F. Vieweg/GWV Fachverlage, 2. verb. Aufl. 2002

  4. [4]

    Basshuysen, R.; Schäfer, F. (Hrsg.): Lexikon Motorentechnik, F. Vieweg/GWV Fachverlage, 1. Aufl. 2004

  5. [5]

    Volkswagen AG, Pressemitteilung Nr. 413/2004 vom 14.12.2004

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Kronberger, M., Jovovic, D., Pirkl, R. et al. Unit injectors with piezo actuator for Euro 4 diesel engines. MTZ Worldw 66, 8–11 (2005).

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  • Diesel Engine
  • Injection Process
  • Valve Needle
  • Pump Piston
  • Piezo Actuator