ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Changing the advanced ignition angle by rotating the distributor housing, the effects of ignition timing on M20 and E20（20% methanol and ethanol by volume）alcohol-gasoline blends fuelled SI engine performance and exhaust emissions were experimentally investigated. The experimental results show that, compared with gasoline, M20 and E20 fuel blends advance the maximum burning pressure point by 1°CA (crank angle) and 0.5°CA, and the optimal ignition timing by about 2°CA and 1°CA respectively. The effects of ignition timing on engine power, fuel economy and exhaust emissions characteristics of two blends are similar. With the advance of ignition timing, engine power and brake torque increase, brake-specific energy consumption (BSEC, Bsec) decreases and the thermal efficiency is improved, however, CO, HC and NOx emissions are enhanced.