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LPG Engine Research and Development in Japan
Published October 21, 1996 by Convergence Transportation Electronics Association in United States
The LPG Center is presently carrying out research and development on two different kinds of LPG engines as a national project. One project involves an LPG diesel engine having an ignition assist mechanism by an injection of diesel fuel, and the other is an LPG-fueled spark ignition lean burn engine. This development effort was aimed at obtaining a significant reduction of soot and NOx emissions from heavy-duty vehicles while maintaining a thermal efficiency as close as possible to existing diesel engines. By utilizing exhaust gas recirculation (EGR) and suitable catalysts these engines easily pass the 1998 Japanese emissions regulations. A prototype LPG diesel engine vehicle has been completed in 1996 and the LPG lean-burn engine vehicle is scheduled to be completed in 1997.