High power density, low weight, compact dimensions, high efficiency as well as reliability are the key factors in designing and dimensioning piston engines for General Aviation and Unmanned Aerial Vehicle (UAV) power plants. Despite of new available technologies, conventional solutions are still struggling to fulfill simultaneously all those requirements. The paper explores the application of a new design of 2-Stroke externally scavenged engines to aircraft. The new concept basically consists in the use of a patented rotary valve for controlling the flow through a set of inlet ports, enabling supercharging and the achievement of extremely high power densities compared to conventional solutions. The scavenging is realized by using an external pump, made up of a further cylinder, whose piston is connected to the same crankshaft. The piston pump allows the crankcase to be used as a conventional oil sump, and greatly improves the crankshaft balance. No poppet valves or camshafts need to be installed, since the flow is driven by piston-controlled ports and by two sets of reed valves. The engine can adopt two types of combustion system: Gasoline Direct Injection (GDI) for SI operations, and Direct Injection Common Rail for Diesel cycle. The paper is focused on the last version, since it can run on standard aircraft fuel. The Diesel engine has three cylinders and three piston pumps, for a total displacement of 1.5 liter The engine is turbocharged and inter-cooled, in order to reach a power target, at sea level, of 150 kW@4000 rpm. Another fundamental target is the minimum power of 100 kW, at the altitude of 20,000 feet.The paper reviews the design of the engine and presents the numerical prediction of the key performance parameters.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A New Design Concept for 2-Stroke Aircraft Diesel Engines


    Beteiligte:


    Erscheinungsdatum :

    2014


    Format / Umfang :

    10 Seiten, 16 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    2-Stroke High Speed Diesel Engines for Light Aircraft

    Rinaldini, Carlo Alberto / Mattarelli, Enrico / Wilksch, Mark | SAE Technical Papers | 2011


    Two-stroke diesel engines

    Grecchi, A. | Engineering Index Backfile | 1923


    Diesel, aircraft, engines

    Wilkinson, Paul H. | SLUB | 1936


    Aircraft diesel engines

    Martinot-Lagarde, C. | Engineering Index Backfile | 1930


    Aircraft diesel engines

    Engineering Index Backfile | 1943