電磁流量計による燃焼噴射装置の研究 : 第1報, 電磁流量計の研究

概要

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To clarify the fuel injection phenomena in diesel engines, not only the change of pressure, but also the variation of velocity at any point of the fuel supply line must be measured. So we have attempted to make a DC electromagnetic flowmeter suitable to record the instantaneous velocity with a high sensitivity under high pressure, using water as an alternative of fuel. After the examination of various causes which produce electrochemical noises, we have adopted the following system. (1) A new type of probe (pick up), which withstands the hydraulic pressure up to 500〜600 kg/cm^2,has been developed. Two fine silver wires covered with thin co-axial insulators are inserted into the fuel pipe from the opposite side paying attention not to disturb the flow, and are used as the electrodes. (2) The electro-motive force induced by the velocity of flow and the strong magnetic field is amplified with a balanced circuit of 66〜90 db. (3) The input resistance of the preamplifier, in which grid current is limited under 10^<-12>A, is taken between 60〜200 MΩ to prevent the polarization effect in the flow.
社団法人日本機械学会の論文
1962-11-25