The corresponding learning algorithm is given and the effectiveness of this method is proved by the prediction of exhaust gas temperature in aircraft engine condition monitoring 给出了相应的学习算法，并以飞机发动机状态监控中发动机排气温度的预测为例验证了模型和算法的有效性。
Key factors deciding the exhaust noise of the engine includes the cylinder pressure , the exhaust valve diameter , the discharge capacity of the engine and the opening characteristic of the exhaust valve 影响发动机排气噪声的主要因素有：汽缸压力、排气门直径、发动机排量及排气门开启特性等。
The identification of error path is very important in active noise control . i used several technologies in achieving the model of the error path . the result of the identification was very precise 在将自适应控制技术应用到发动机排气噪声的控制过程中，误差通道的辨识是其中的一项重要的工作。
The development and study of the engine electronic control technology , which is regarded as one important method to reduce the exhaust emissions and improve the power and economy performance , is paid more and more attention 发动机电控技术作为降低发动机排气污染，提高其动力性和经济性的一个重要手段，它的研究和开发越来越受到人们的重视。
The technology of controlling vehicle emission is researched . some deep studies , matching technology of engine for vehicle , emission performance of engine , working process of emission postprocessor , are investigated 本文研究汽车排放污染物的控制技术，在发动机与整车匹配技术、汽车发动机排气性质、汽车排气后处理装置工作过程等方面开展了深入的研究。
Exhaust emissions from vehicle engines are worsening the environment the human beings rely on to such an extent that it cannot but be brought under control . therefore , this paper proposes five measures against exhaust emissions from vehicle engines 车用发动机排放污染正在威胁着人类赖以生存的环境，已经到了非治理不可的地步，为此本文提出了降低车用发动机排气排放物的五点措施。
The impact on the muffler performance is realized by the high - speed pulsation gas flow , which regenerates noises and strikes the acoustic elements of the muffler such as the pipe run , the body case and the separator plate to arouse the vibration radiated noise 气流影响消声器性能的主要原因是发动机排气的高速脉动气流再生噪声，其次是这种气流会冲击消声器的管路、壳体、隔板等声学元件，进而激发振动辐射噪声。
In the text , there analyzes the process of the mixture air and fuel in the two stroke gasoline engine and bring forward the specific solution to the improvementsing gasoline engine the high - press direct in - cylinder injection . this technology sprays the feul into the cylinder after the outlet vavle closed and scavengs the engine cylinder with pure and fresh air , which avoid the fuel escapes unburned 本文分析了二冲程汽油机混合气形成过程，并提出了具体的改进方案，用缸内高压直接喷射技术进行改造。缸内高压直接喷射是在发动机排气口关闭后向气缸内喷射燃油，使用纯新鲜空气进行扫气，避免了燃油短路损失。
Passages reserved for connecting the engine room to the outside ( e . g . , the cooling fan outlet , the exhaust outlet , the ventilation outlet , etc . ) must be designed as muffling passages , whose insertion loss should also be equivalent to the sound insulation amount of the fender structure . only in this way can the environmental noise outside the engine room live up to the standard 为机房与外界相通而预留的通道（如冷却风扇出口、发动机排气出口、机房通风换气口等）必须设计成消声通道，其插入损失也应与围护结构的隔声量相当，只有这样做才可保证机房外的环境噪声达标。
For the manifold of sedan engine , the hest thermal fatigue properties can be obtained by keeping the percent of vermicular graphite at about 50 % , therefore it shouldn ' t he considered that the lowest e . g . percent limit of 50 % specified in chinese vermicular iron standard is too lower , and it is also not proper to take the v . g . percent as the basis for judging the level of production technology 摘要对轿车发动机排气歧管而言，蠕化率控制在50 %左右可以获得最佳的抗热疲劳性能，因此不能认为我国的蠕铁标准中规定的蠕化率高于50 %的要求偏低了，也不能把蠕化率的高低作为衡量工艺水平的依据。
