Degree of Destructive Combustion within Combustion Chamber of Diesel Engines

Abstract

We have used rectangular co-ordinates that enable us to indicate the completeness of destructive combustion. The ordinate y designates oxygen consumed and the abscissa x, (&orv;-0.5) (CO)+&orv; (CO₂)-0.5 (H₂) in % respectively. &orv; can be any real number, but fuel index (Kenzahl des Brennstoffes) σ₀ or unit is useful. When &orv; equals σ₀, the perfect combustion gases are plotted on the straight line y=(tan α)x and tan α is unit. But the combustion gases of light part of the elements of fuel have tan α which is in the relation 1<tan α<∞, while tan α of heavy elements is less than unit. The more incomplete a destructive combustion is, the more tan α of light elements increases and on the other hand that of heavy components decreases. When &orv; is unit, combustion gases of hydrocarbon are never plotted under the line y=x.