Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 39 for “"Two-stroke"”.
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Two-stroke linear engine
… mechanism engine, insofar as the motion of the two horizontally opposed pistons is not externally constrained. A two-stroke engine prototype, with a bore of 36.5 mm and a maximum stroke of 50 mm, operating in a gasoline-fueled spark-ignited mode, was tested successfully under varying …
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Performance of a crankcase-scavenged two-stroke engine
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1953.
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Tribopolymerization as an approach to two-stroke engine lubrication
… performed to investigate the current status of two-cycle gasoline engines from the standpoint of design, performance, benefits, lubrication and emissions. The two-stroke engine offers several significant advantages over its four-stroke counterpart, which include: simple design, low production …
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Modelling the scavenging process in a two-stroke I.C. engine
The primary concern associated with a two-stroke engine performance is its gas exchange process (scavenging process). The success of the scavenging process greatly affects the thermodynamic properties of cylinder content at the trapping conditions and hence the combustion and power output. The …
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Instrumentation for the performance testing of miniature two stroke engines
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1952.
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Computational fluid dynamics modeling of a large bore two-stroke natural gas engine
… in use. The most common configuration is a two-stroke cycle with direct injection of natural gas into the cylinder. The specific engine modeled in this study, the GMV Cooper Bessemer engine, is widely used in the gas compression industry, primarily in 10 cylinder versions. As air emission …
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Operation and control of a two-stroke, free-piston-engine-driven linear alternator
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Measurement of scavenging efficiency in the two stroke engine: a comparison and analysis of methods
Thesis (Nav.E.) Massachusetts Institute of Technology. Dept. of Naval Architecture and Marine Engineering, 1949.
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CFD modelling and investigation of two-stroke dual-fuel marine engines with high pressure gas admission
… and high efficiency, the large two-stroke marine engines are widely used by the merchant ships. However, as the conventional two-stroke diesel engines suffer from the high pollutants emissions, the dual fuel versions burning natural gas and pilot fuel to initiate combustion is an …
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Reducing emissions of a large bore two stroke cycle engine using a natural gas and hydrogen mixture
… hydrogen as a fuel additive for a large bore, two stroke cycle, single cylinder, natural gas fueled Ajax engine in a test laboratory. The engine was first operated at the test point on pure natural gas and allowed to stabilize. Then a mixture of hydrogen and natural gas at various molar …
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An Experimental Study of Two-Stroke Cyclic Variation and a Prototype Component Design for Controlled Auto Ignition.
… of carbon dioxide and associated emissions. 2-stroke engines are known to provide considerable benefits in weight reduction and power density in comparison to their 4-stroke brethren. However, very poor cycle-to-cycle stability under low load and low RPM conditions has rendered them impossible …
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Development of an efficient 3-D CFD software to simulate and visualize the scavenging of a two-stroke engine
The two-stroke engine is widely used in many different devices. But the environmentally problematic exhaust characteristic is a big drawback of this type of engine. In the scavenging process, when the fresh charge displaces the exhaust gas in the cylinder, lies the biggest opportunity to improve …
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Investigation of alternative rotorcraft powerplant configurations for improving airframe performance
… piston engines, operating in both four- and two- stroke modes, were considered as alternative configurations and were evaluated using industry trends and example engine data. Additionally, the two/four-stroke switching gasoline engine (changing operation mode between two- and four-stroke) was …
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Hybrid Electric Distributed Propulsion for Vertical Takeoff and Landing Aircraft
… begins by characterizing the performance of two similar embedded propulsion systems using computational fluid dynamics (CFD). From this initial analysis, a wind tunnel model is constructed and the systems are tested across the operating conditions required to characterize the performance of a …
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