Abstract
A characteristic of the injection rate of an emulsified fuel is investigated experimentally. As a result, the authors found out the following. The emulsified fuel contains a considerable amount of air-bubbles. When we define the air-bubble content as a function of water content y, namely z=ay, the value of is estimated about 0.5×10-4 to 1.0×10-4. Therefore, the sound velocity and the bulk modulus of elasticity decrease with increased water content. The increased viscosity of the emulsified fuel tends to advance the injection timing. On the other hand, the decreased bulk modulus of elasticity tends to retard the injection timing. Furthermore, the variation of air-bubble content in the emulsified fuel increases the variation of the injection timing, and of the injection rate during the injection.
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