The Analysis of Exhaust Emissions at Different Placemens of Low Pressure Fuel Injectors in Two Stroke Engine

Lubomír Klepáč, D. Rozehnal
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Abstract

With more strict emission control the fuel injectors must be implemented even into the small two-stroke engines. To maintain the simplicity of small two stroke engine low pressure fuel injector is used. The main problems with two stroke engines are its high hydrocarbon emissions which could be influenced by the position and setting of the fuel injection. The paper compares three different injector positions and evaluates the flow through the engine to determine the best fuel injector position for future developers of two stroke engines. The engine cycle is first to be simulated by computational fluid dynamics where the mass flow of delivered, untrapped and trapped fuel is analyzed. The engine with three different injector positions is manufactured and the engines emissions are measure on engine test stand.
二冲程发动机低压喷油器不同位置排气排放分析
随着更严格的排放控制,即使在小型二冲程发动机中也必须实施燃油喷射器。为了保持小型二冲程发动机的简洁性,采用了低压喷油器。二冲程发动机的主要问题是其高碳氢化合物排放,这可能受到燃油喷射位置和设置的影响。本文对三种不同的喷油器位置进行了比较,并对发动机的流量进行了评估,以确定未来二冲程发动机的最佳喷油器位置。首先采用计算流体动力学方法对发动机循环进行模拟,分析了输送、未截留和截留燃料的质量流。制造了三种不同喷油嘴位置的发动机,并在发动机试验台对发动机的排放进行了测量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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