ディーゼル燃料噴射管内のキャビテーションに関する研究 : 第2報, デリバリバルブ吸戻し量とキャビテーションの関係

概要

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Recently, high pressure injection systems have been used in many direct injection diesel engines. These systems are effective in improving fuel consumption, exhaust performance and so on. But cavitation erosion in the fuel injection tube is a problem in these systems. Measurement of negative pressure is important to prevent occurrence of cavitation phenomena and erosion in the fuel injection tube. Therefor we trial manufactured a device to measure negative pressure exactly and a measured negative pressure as the same time cavitation bubbles using a system to observe bubbles and a negative pressure sensor. In this work we also determine which retraction volume of the delivery valve does not influence cause of negative pressure and cavitation bubbles. Moreover, we confirmed that when using a low retraction volume delivery valve, growth remarkable negative pressure to such a degree that -1 (atg) below.
一般社団法人日本機械学会の論文
1997-09-25