内燃机工程
內燃機工程
내연궤공정
CHINESE INTERNAL COMBUSTION ENGINE ENGINEERING
2009年
6期
1-4,9
,共5页
赵昌普%李艳丽%孙强%王天友
趙昌普%李豔麗%孫彊%王天友
조창보%리염려%손강%왕천우
内燃机%天然气发动机%可变气门定时%充量系数%输出功率
內燃機%天然氣髮動機%可變氣門定時%充量繫數%輸齣功率
내연궤%천연기발동궤%가변기문정시%충량계수%수출공솔
IC engine%natural gas engine%variable valve timing(VVT)%volumetric efficiency%brake power
利用GT-Power软件建立了天然气发动机仿真模型,并对其进排气门的配气相位进行优化,研究并预测了配气相位优化前后发动机充量系数及功率的变化规律.对该天然气发动机的计算结果表明,采用可变气门定时(VVT)技术后,发动机的功率有明显提高,尤其是在中低转速时,功率提高达到10%以上,大大改善了发动机的动力性能.
利用GT-Power軟件建立瞭天然氣髮動機倣真模型,併對其進排氣門的配氣相位進行優化,研究併預測瞭配氣相位優化前後髮動機充量繫數及功率的變化規律.對該天然氣髮動機的計算結果錶明,採用可變氣門定時(VVT)技術後,髮動機的功率有明顯提高,尤其是在中低轉速時,功率提高達到10%以上,大大改善瞭髮動機的動力性能.
이용GT-Power연건건립료천연기발동궤방진모형,병대기진배기문적배기상위진행우화,연구병예측료배기상위우화전후발동궤충량계수급공솔적변화규률.대해천연기발동궤적계산결과표명,채용가변기문정시(VVT)기술후,발동궤적공솔유명현제고,우기시재중저전속시,공솔제고체도10%이상,대대개선료발동궤적동력성능.
The simulation model of a compressed natural gas engine was established by using GT-Power software. The intake and exhaust timing were optimized, the behavior of the volumetric efficiency and brake power before and after optimization was investigated and forecasted. The simulated results indicate that by using variable valve timing (VVT) system, the engine brake power has a significant improvement. At low and middle speed range, the brake power rises over 10%, and the engine power performance can be improved greatly.
