ディーゼル機関における燃料噴射終りの噴射特性に関する研究 : 第1報, ポンプ側の圧力降下について

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  • A Study of Characteristics at the End of Injection in Diesel Engine Fuel System : 1st Report, Analysis of Pressure Drop on Pump Side
  • ディーゼル キカン ニ オケル ネンリョウ フンシャ オワリ ノ フンシャ トクセイ ニ カンスル ケンキュウ 1

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The object of this paper which deals with the phenomena at the end of injection of Bosch pump injection system is to show the relation between the design of fuel injection equipment and the pressure drop at the pump side. It was found from experiments that the pressure drop had two features. Pressure at the pump side drops down along a fundamental pressure dropping curve. The fundamental pressure drop is a function of crank angle, injection pipe area, etc., but not of engine speed. The pressure drop along this curve has a maximum value which is decided mainly by the design of the delivery valve of the pump. The theoretical equations of pressure change and flow through the delivery valve port are obtained after reasonable treatment. Assuming suitable factors, the solution of these equations coincided very well with the experimental results.

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