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Optimization of injection pressure for fuel consumption and exhaust emissions in a dimethyl ether (DME) engine with a common rail type injection system

Yanai T., Konno M., Sato Y., Oikawa H., Nozaki S.

Journal of KONES

2010

Vol. 17, No. 2

511-518

Development of DME (dimethyl ether) fueled diesel engines for light-duty trucks MEETING 2009 Japan emission regulation

Sato M., Nozaki S.

Journal of KONES

2006

Vol. 13, No. 2

387-396

DME fuel has been attracting attention as an alternative fuel for diesel engine. DME has a high cetane number and compression ignition capability. This enables a high thermal efficiency comparable to diesel engines. Moreover, DME creates no smoke or sulfur oxide. However, even when using DME, NOx still remain problems under stringent exhaust emission regulations. For severe NOx regulation and develop of alternative fuel for diesel engines, the diesel engines (Isuzu Motors Limited: 4HG1T) fueled with DME for light-duty trucks using a jerk type in-line DME injection system which meet the JAPAN 2009 emissions regulation was developed. Adopting the lower exhaust emission technology, such as a large volume EGR system with air-throttled and inter-cooled turbo-charging, National Traffic Safety and Environment Laboratory and Bosch Corporation has demonstrated the low-emission engines which achieve to reduce NOx emission level by about 50% (0.37 g/kWh) of the 2009 emissions regulation (<0.7 g/kWh) without a NOx reduction catalyst system.