ジメチルエーテル(DME)を燃料とした圧縮点火直接噴射機関の性能と排気特性 : 第1報, レトロフィット時の機関性能および排気特性
1998 年 64 巻 627 号 p. 3909-3914
詳細
1998 年 64 巻 627 号 p. 3909-3914
Engine performance and exhaust gas characteristics of a direct injection CI engine were investigated with neat dimethyl-ether (DME), an alternative fuel being considered for attaining low emissions. The study was conducted by comparing with conventional gas oil. Results from the present work include : (1) It was necessary to add a small amount of lubricating additives to DME for achieving satisfactory engine operation, to minimize some excessive wear in the injection nozzle. (2) Engine performance for both fuels were comparable. (3) Although negligible amounts of soot ane very low THC emissions were measured, NOx emission was about the same as in gas-oil operation. (4) The reduction of NOx emission by retarding the injection timing was highly significant with DME. (5) The NOx emission from the retrofited engine could be further reduced by dissolving CO2 in DME.
