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电控柴油机性能开发与优化标定技术研究
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摘要
随着排放法规的日益严格和电控系统的不断发展,发动机电控系统的控制参数越来越多,使得发动机电控系统标定匹配的工作量越来越大,而现代发动机的开发又需要我们尽可能缩短开发时间。因此,降低标定费用、缩短标定周期、提高标定结果精度已经成为我们迫切需要解决的问题。
     本文结合一汽技术中心CA6DL发动机开发项目的子项目:“CA6DL2-35E2CR型超低油耗发动机开发”,对采用电控高压共轨,达到EUROⅡ排放,实现发动机超低油耗的技术进行了分析研究,研究工作主要如下:
     1.试验设计方法研究。采用DOE(试验设计)技术,可以解决多参数多目标优化问题,减少试验点,进而缩短开发周期,降低开发成本。
     2.自动优化标定系统研究。针对AVL自动优化标定软件CAMEO,分析了其软件结构、功能,并实际应用该软件,对发动机13工况排放进行了优化。
     3.电控共轨发动机性能开发方法研究。进行了CA6DL2-35E2CR型超低油耗发动机的性能开发,并对开发流程和结果进行了介绍。
     本文通过CA6DL2-35E2CR型超低油耗发动机开发,对试验设计方法以及自动优化标定系统进行了较深入的研究,并对结果进行了分析。利用自动优化标定软件,通过试验设计,减少试验数据量,进而减少开发时间,降低了开发费用。
With the development of automotive industry, energy crisis and environment pollution problem are increasing. And now, many countries have established emission control regulations to limit engine and vehicle exhaust emission, including CO、NOx and PM etc. However, with the continuously increasing of greenhouse effect and energy crisis, many countries have already put out regulation to restrict emission of CO2. Many engine and vehicle manufacturers are studying low fuel consumption technology, so does FAW.
     CA6DL2-35E2CR engine development was described in this thesis, this engine is equipped with comman rail system to realize low fuel consumption and meet EUROⅡemission level, the main works are :
     DOE technology study. using DOE technology, multi parameter and multi target optimization problem can be solved,measurement point was reduced, and finally developmet time and cost can be reduced.
     Engine automatic calibration and optimization system study. According to AVL automatic calibration and optimization software CAMEO, its frame and function was analyzed, this software was used to optimize engine 13 mode emission result.
     Electric control engine performance development study. DENSO Comman Rail System is equipped on CA6DL2-35E2R, the engine must be limited by emission level, cylinder peak pressure, exhaust temperature etc, and then realize low fuel consumption.
     Improved vehicle performance prediction. After evaluation, in order to make vehicle have better performance, engine performance was developed again, and then we got new engine fuel consumption data.
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