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首页> 外文期刊>Journal of Energy Engineering >Optical Investigation of Postinjection Strategy Effect at the Exhaust Line of a Light-Duty Diesel Engine Supplied with Diesel/Butanol and Biodiesel Blends
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Optical Investigation of Postinjection Strategy Effect at the Exhaust Line of a Light-Duty Diesel Engine Supplied with Diesel/Butanol and Biodiesel Blends

机译：配备柴油/丁醇和生物柴油混合物的轻型柴油机排气管后喷射策略效果的光学研究

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摘要

Ultraviolet (UV)-visible-near infrared (IR) multiwavelength extinction spectroscopy was applied in the exhaust line of an automotive common rail diesel engine to investigate the postinjection strategy impact on the fuel vapor. Four fuels were tested: a baseline diesel and three blends of diesel with 20% by volume of rapeseed methyl ester (RME), 20% of n-butanol and 20% of RME along with 20% of n-butanol. Experiments were performed at the engine speed of 2,750 rpm and 1.2 MPa of brake mean effective pressure. Preliminary engine tests were carried out to explore the postinjection activation aptitude to produce hydrocarbons at the exhaust, needed for the diesel oxidation catalyst (DOC) and the regeneration of the diesel particulate filter (DPF). Results of hydrocarbon and smoke emissions at the exhaust, with and without postactivation, are presented for the different blends. The optical diagnostic allowed to evaluate, during the postinjection activation, the evolution of the fuel vapor in the engine exhaust line. The spectroscopic investigation was focused on evaluation of the post-injection aptitude and fuel composition to produce hydrocarbon-rich exhaust gaseous. The main results showed that the butanol blended with diesel and/or biodiesel induced a higher concentration of fuel vapor within the exhaust manifold and consequently a lower tendency to lubrication oil dilution.
机译：在汽车共轨柴油机的排气管路中采用了紫外线（UV）-可见光-近红外（IR）多波长消光光谱法，研究了后喷射策略对燃油蒸气的影响。测试了四种燃料：基准柴油和三种柴油与20％体积菜籽甲酯（RME），20％正丁醇和20％RME以及20％正丁醇的混合物。实验是在2750 rpm的发动机转速和1.2 MPa的制动平均有效压力下进行的。进行了初步的发动机测试，以探索在喷射后活化的能力，以在废气中产生烃，这是柴油机氧化催化剂（DOC）和柴油机微粒过滤器（DPF）再生所需的。列出了不同混合物在有或没有后活化的情况下废气中碳氢化合物和烟气排放的结果。光学诊断程序可以在喷射后激活期间评估发动机排气管路中燃油蒸气的释放。光谱学研究集中在评估后喷射能力和燃料成分以产生富含烃的废气中。主要结果表明，将丁醇与柴油和/或生物柴油混合后，会在排气歧管内引起较高的燃油蒸气浓度，因此降低了润滑油稀释的趋势。

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