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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >Performance and emissions of a 4-cylinder gasoline engine with Controlled Auto-Ignition
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Performance and emissions of a 4-cylinder gasoline engine with Controlled Auto-Ignition

机译：具有自动点火功能的4缸汽油发动机的性能和排放

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摘要

Advanced combustion modes such as Controlled Auto-Ignition or Homogeneous Charge Compression Ignition have been under much attention due to their ability to reduce both emissions and fuel consumption. Thus, this paper aims at demonstrating the achievement of Controlled Auto-Ignition combustion on a standard 4-cylinder gasoline engine with negative valve overlap (NVO) and analyzing its performance and emissions. The engine remained with substantially original components. The only major modification was the replacement of the camshafts for a new set of bespoke ones. The results showed a fair range of load and speed under CAI combustion with reduced brake specific consumption and ultra-low levels of NOx emissions. CO was also reduced, while HC emissions showed increased values. The results also point out some of the drawbacks of CAI combustion and the technological challenges of this advanced combustion process.
机译：先进的燃烧模式，例如可控自动点火或均质充气压缩点火，由于具有减少排放和降低燃料消耗的能力而备受关注。因此，本文旨在论证在具有负气门重叠（NVO）的标准4缸汽油发动机上实现可控自动点火燃烧并分析其性能和排放。发动机基本上保留了原始零件。唯一的主要修改是将凸轮轴替换为一组新的定制轴。结果表明，在CAI燃烧下，负载和速度的变化范围相当大，降低了制动器的比消耗，并且NOx排放量超低。一氧化碳也减少了，而碳氢化合物的排放却增加了。结果还指出了CAI燃烧的一些缺点以及这种先进燃烧过程的技术挑战。

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