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Development of a Novel Uniflow-Scavenged Two-Stroke GDI Engine
Technical Paper
2006-01-0187
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper reports on the progress in the development and testing of a novel two-stroke gasoline direct-injection engine (GDI) that incorporates uniflow scavenging without the use of camshaft actuated poppet valves. Compressed air is fed into the cylinder through a matrix of passive check valves located in the cylinder head. Air-only scavenging, in combination with high-pressure GDI, ensures that traditional two-stroke pitfalls, such as high emissions and poor fuel economy due to short circuiting, are eliminated. The engine was successfully operated at speeds up to 5500 rpm. In-cylinder and intake plenum pressures were measured as a function of time and crank angle from which the check valve opening and closing time and the duration of the scavenging process was identified. The delivery ratio and air-fuel (A/F) ratio are reported.
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Citation
Ohlmann, D., Reynolds, S., and Ciccarelli, G., "Development of a Novel Uniflow-Scavenged Two-Stroke GDI Engine," SAE Technical Paper 2006-01-0187, 2006, https://doi.org/10.4271/2006-01-0187.Also In
References
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