Preliminary bench tests have been carried out on an original-design 2-stroke single-cylinder prototype engine, which is equipped with an electronically controlled gasoline direct injection apparatus. The main design and operating features of the engine concern: a unidirectional airflow during the scavenging process (from the inlet ports near the BDC to overhead cam-actuated valves), an external air pump (a Roots volumetric type driven by an electric motor) and a force-feed lubrication system, like those usually exploited in mass-produced 4-stroke engines. Experimental bench tests were carried out under low load, intermediate rotational speed operating conditions. The performances were compared to those obtained from a commercial crankcase-scavenged 2-stroke engine using an indirect injection fuel feeding system. Encouraging results were obtained as far as fuel consumption and pollutant emissions are concerned. Other improvements are expected thanks to scheduled modifications regarding a new piston design along with a new arrangement of both the spark-plugs and the injector position.

R&D of a new G.D.I. 2-Stroke Engine with a Unidirectional Scavenging Flow and a Force-Feed Lubrication System / Nuccio, Patrizio; Marzano, M. R.. - In: SAE TECHNICAL PAPER. - ISSN 0148-7191. - ELETTRONICO. - (2007). (Intervento presentato al convegno Small Engine Technology Conference tenutosi a Niigata (Japan) nel October 30-November 1, 2007. Niigata (Japan)).

R&D of a new G.D.I. 2-Stroke Engine with a Unidirectional Scavenging Flow and a Force-Feed Lubrication System

NUCCIO, Patrizio;
2007

Abstract

Preliminary bench tests have been carried out on an original-design 2-stroke single-cylinder prototype engine, which is equipped with an electronically controlled gasoline direct injection apparatus. The main design and operating features of the engine concern: a unidirectional airflow during the scavenging process (from the inlet ports near the BDC to overhead cam-actuated valves), an external air pump (a Roots volumetric type driven by an electric motor) and a force-feed lubrication system, like those usually exploited in mass-produced 4-stroke engines. Experimental bench tests were carried out under low load, intermediate rotational speed operating conditions. The performances were compared to those obtained from a commercial crankcase-scavenged 2-stroke engine using an indirect injection fuel feeding system. Encouraging results were obtained as far as fuel consumption and pollutant emissions are concerned. Other improvements are expected thanks to scheduled modifications regarding a new piston design along with a new arrangement of both the spark-plugs and the injector position.
2007
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1652259
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