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

In order to simulate and analyze the economy performance of the tracked hybrid electric bulldozer under whole operation cycle, a secondary development of ADVISOR was applied and straight and steering dynamics model, track model, oil pump model and transfer case model, etc., were established in Matlab/Simulink, then the models of hybrid electric bulldozer and its compared bulldozer were built. The real two compared bulldozers’ tests were conducted under straight cycle and steering cycle, respectively. And then the key operating parameters of powertrain source and powertrain terminal in simulations and tests, such as speed of engine, power of genset, voltage of super capacitors and traction and velocity of bulldozer, were compared to validate the accuracy of the models. The results showed that the established models had relatively high simulation accuracy. The economy performance was simulated under whole operation cycle by using the established models, which showed that the hybrid electric bulldozer had significant energy savings under both straight dozing and steering cycles, furthermore, the adoption of the enginegenerator set optimal efficiency curve control strategy can further enhance the energy saving effect.