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本文介绍一种新的基于喷射式柴油机工作原理的汽油机喷射方式来改善发动机的燃烧。它除要求改进燃烧室形状之外,还从根本上改变了传统汽油机的混合气形成和燃烧方法。本文介绍了汽油从进气道喷射和直接喷射时的燃油消耗、废气排放特性和燃用稀混合气的能力。进气道汽油喷射是定时、定位进行的,通过在燃烧室某一区域形成汽油油膜来提高燃用稀混合气的能力。发动机的过量空气系数可高达2,但由于α≧1.6之后,发动机的比油耗急剧升高,故希望α在1.3～1.6之间。与排量相同的直喷式柴油机相比,其比油耗要高13％。采用汽油直喷式,能进而使其比油耗接近直喷式柴油机的水平,同时还可燃用低质汽油,但其缺点是升功率和废气排放指标较差。由于直喷式汽油机宜于采用废气涡轮增压,故上述缺点得以弥补。
This article describes a new gasoline engine injection based on the principle of injection diesel engine to improve the combustion of the engine. In addition to the need to improve the shape of the combustion chamber, it also fundamentally changed the traditional gasoline engine mixture formation and combustion methods. This article describes the fuel consumption, exhaust emission characteristics, and the ability to burn out lean mixtures of gasoline when it is injected from the inlets and directly injected. Inlet gas injection is timing, positioning carried out, by forming a film of gasoline in a certain area of the combustion chamber to improve the ability to burn lean mixture. Excessive air coefficient of the engine can be as high as 2, but since α ≧ 1.6, the engine fuel consumption rises sharply, so the hope α is between 1.3 to 1.6. Compared with the direct displacement diesel engine with the same displacement, it is 13% higher than the fuel consumption. The use of gasoline direct injection, which in turn can make it close to the direct injection diesel fuel consumption than the level of fuel can also be used with low quality gasoline, but the disadvantage is the liter of power and poor emission targets. The above shortcomings are offset by the fact that direct injection gasoline engines are better suited for exhaust turbocharging.