汽车安全与节能学报
汽車安全與節能學報
기차안전여절능학보
JOURNAL OF AUTOMOTIVE SAFETY AND ENGERGY
2014年
4期
407-412
,共6页
杨博%尉星%习成训%宁小康%曾科
楊博%尉星%習成訓%寧小康%曾科
양박%위성%습성훈%저소강%증과
柴油发动机%高压共轨%双燃料%天然气%控制策略%等热值替代
柴油髮動機%高壓共軌%雙燃料%天然氣%控製策略%等熱值替代
시유발동궤%고압공궤%쌍연료%천연기%공제책략%등열치체대
diesel engine%high-pressure common-rail%dual fuel%natural gas%control strategy%equivalent heating value substitution
为提高经济性和降低排放,开发了双燃料发动机电控单元(ECU);对一高压共轨柴油发动机进行了双燃料改装,以实现柴油引燃天然气的燃烧模式。用实验方法,验证了基于柴油等热值替代的双燃料控制策略。结果表明:相比纯柴油模式原机,双燃料模式下给定替代率的实时控制的误差不超过5.2%;外特性曲线基本一致,最大扭矩增加了2.6%;CO2排放降低了40%,NOx排放降低了33%;但总碳氢化合物排放的最大值比原机高出20倍,CO排放的最大值高出6倍。这说明,本控制策略合理可行,适合天然气双燃料发动机。
為提高經濟性和降低排放,開髮瞭雙燃料髮動機電控單元(ECU);對一高壓共軌柴油髮動機進行瞭雙燃料改裝,以實現柴油引燃天然氣的燃燒模式。用實驗方法,驗證瞭基于柴油等熱值替代的雙燃料控製策略。結果錶明:相比純柴油模式原機,雙燃料模式下給定替代率的實時控製的誤差不超過5.2%;外特性麯線基本一緻,最大扭矩增加瞭2.6%;CO2排放降低瞭40%,NOx排放降低瞭33%;但總碳氫化閤物排放的最大值比原機高齣20倍,CO排放的最大值高齣6倍。這說明,本控製策略閤理可行,適閤天然氣雙燃料髮動機。
위제고경제성화강저배방,개발료쌍연료발동궤전공단원(ECU);대일고압공궤시유발동궤진행료쌍연료개장,이실현시유인연천연기적연소모식。용실험방법,험증료기우시유등열치체대적쌍연료공제책략。결과표명:상비순시유모식원궤,쌍연료모식하급정체대솔적실시공제적오차불초과5.2%;외특성곡선기본일치,최대뉴구증가료2.6%;CO2배방강저료40%,NOx배방강저료33%;단총탄경화합물배방적최대치비원궤고출20배,CO배방적최대치고출6배。저설명,본공제책략합리가행,괄합천연기쌍연료발동궤。
A direct injection, high-pressure common-rail diesel engine was converted into a diesel pilot-ignited dual fuel engine using a developed dual-fuel engine control unit (ECU) for better economy and lower emissions. A real-time diesel substitution rate control strategy for a dual fuel engine was proposed, and the control strategy was validated by experiments. The results show that the substitution rate error between the target and experiment was less than 5.2%, and the control strategy meets the demands of the dual fuel engine operation. For the engine performance curves and emissions, the curves of the dual fuel mode were consistent with those of the pure fuel mode. The maximum torque of the dual fuel mode increases 2.6% compared with that in diesel mode with CO2 and NOx emissions decreasing 40% and 33%, and with the total hydrocarbon and CO peak emissions increasing 20 and 6 times compared with those in the diesel mode. Therefore, the strategy is rational and feasible for controling natural gas dual-fuel engines.