首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering >Impact of lean-burn control technology on the fuel economy and NO_x emission of gasoline engines
【24h】

Impact of lean-burn control technology on the fuel economy and NO_x emission of gasoline engines

机译:稀燃控制技术对汽油机燃油经济性和NO_x排放的影响

获取原文
获取原文并翻译 | 示例
       

摘要

Lean-burn engines operate at a very lean air-to-fuel (A/F) ratio under light-load and part-load regions. Because of better combustion in the lean mixture, fuel economy enhancement is the major merit. Lean-burn technologies also give rise to high engine performance and low emission levels (hydrocarbons and carbon monoxide). In the full-load region, the engine operates in the stoichiometric or rich mode. The drawback of the lean-burn engine is its higher nitrogen oxide (NO_x) emission level. The three-way catalyst acts as a suitable device near stoichiometry; however, it is inefficient when the A/F ratio is far from stoichiometry. Hence, advanced catalysts are needed to carry out the NO_x storage (oxidation) and purge (reduction) operations. This article is concerned with the lean-burn control applications on gasoline engines, which can also be expanded to other types of engine. Case studies on port fuel injection (PFI) and gasoline direct-injection (GDI) engines have been conducted from different points of view. The experimental investigation on a quasi-homogeneous lean-burn PFI engine has been studied from a fuel economy and NO_x reduction viewpoint. The modelling and control approaches are also presented for GDI engines to achieve ultra-lean mixtures for fuel economy enhancement and NO_x emission reduction.
机译:在轻负荷和部分负荷区域,稀薄燃烧发动机以非常稀薄的空燃比(A / F)运行。由于稀薄混合气中燃烧效果更好,因此提高燃油经济性是主要优点。稀薄燃烧技术还提高了发动机性能,并降低了排放水平(碳氢化合物和一氧化碳)。在满负荷区域,发动机以化学计量或浓模式运行。稀燃发动机的缺点是其较高的氮氧化物(NO_x)排放水平。三元催化剂是接近化学计量的合适装置。但是,当A / F比远离化学计量时,效率低下。因此,需要高级催化剂来进行NO_x的储存(氧化)和吹扫(还原)操作。本文涉及汽油发动机的稀薄燃烧控制应用,该应用还可以扩展到其他类型的发动机。从不同的角度进行了港口燃料喷射(PFI)和汽油直接喷射(GDI)发动机的案例研究。从燃油经济性和减少NO_x的角度出发,已经研究了准均质稀薄燃烧PFI发动机的实验研究。还介绍了用于GDI发动机的建模和控制方法,以实现超稀薄混合物,以提高燃油经济性和减少NO_x排放。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号