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

The experimental investigation of the effect of fuel additives on HCCI combustion process was carried out on a 4-cylinder diesel engine of which the fourth cylinder was modified to run in HCCI mode. The experimental results indicated that under the steady operating conditions, the ignition timing of the base fuel PRF90 (90% iso-octane+10% n-heptane), which is equivalent to RON 90, delays and the peak value of the heat release rate of the base fuel is low compared with the base fuel with additives which advances ignition timing and increases the peak of the heat release rate obviously. At the conditions with the same fuel injection quantity per cycle and the same engine speed, with the increase of the additive mass fraction in the fuel, the ignition and heat release timings bring forward and the peak of heat release rate increases. However, excessive additives will make the engine be prone to knock and run rudely.