The mechanism of backfire in idle condition is theoretically analyzed and the idle control strategy is studied.
对怠速工况下回火现象的生成机理进行理论分析，研究了氢燃料发动机怠速控制策略。
A mechanics model for engine mount system is established with MATLAB based on dynamic stiffness of engine mounts in idle condition.
建立了基于悬置元件怠速工况下动刚度的发动机悬置系统MATLAB力学模型。
The experiment shows that the power of converted engine is the same of the base engine, the emission at idle condition is lower than the national regulation GB14761.5-93.
实验表明，经改造后的发动机的动力性与原机相当，初步测试表明其怠速排放性能远低于我国现行标准GB14761.5—93。
We simulate engine performance in various operating conditions:in idle condition, it reduces the residual gas coefficient and increases airflow velocity, so that idle stability is improved.
模拟计算了各种工况下的发动机性能：怠速工况降低了残余废气系数，提高了进气流速，稳定性得到改善；
We simulate engine performance in various operating conditions:in idle condition, it reduces the residual gas coefficient and increases airflow velocity, so that idle stability is improved.
模拟计算了各种工况下的发动机性能：怠速工况降低了残余废气系数，提高了进气流速，稳定性得到改善；
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