A 50cc Two-Stroke DI Compression Ignition Engine Fuelled by DME

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Kim Rene Hansen - PhD. Student

The low auto-ignition temperature, rapid evaporation and high cetane number of dimethyl ether (DME) enables the use of low-pressure direct injection in compression ignition engines, thus potentially bringing the cost of the injection system down. This in turn holds the promise of bringing CI efficiency to even the smallest engines. A 50cc crankcase scavenged two-stroke CI engine was built based on moped parts. The major alterations were a new cylinder head and a 100 bar DI system using a GDItype injector. Power is limited by carbon monoxide emission but smoke-free operation and NOx <200ppm is achieved at all points of operation.
Place: Shanghai
24 Jun 2008

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ID: 2368602