ELECTROSTATIC OIL MIST SEPARATOR FOR INTERNAL COMBUSTION ENGINE

To enhance the efficiency of trapping oil mist.SOLUTION: An oil mist separator 10 includes a positive electrode plate 40 and a negative electrode plate 50 opposing each other, a filter 60 formed of an electric insulation material and provided between the positive electrode plate 40 and the negative electrode plate 50, a case 11 having an inlet 24 and an outlet 25 and storing the positive electrode plate 40, the negative electrode plate 50, and the filter 60, and a voltage generation device 70 for applying voltage between the positive electrode plate 40 and the negative electrode plate 50. With blow-by gas flowing from the inlet 24 via a space between the positive electrode plate 40 and the negative electrode plate 50 to the outlet 25 in the state that the voltage is applied between the positive electrode plate 40 and the negative electrode plate 50 by the voltage generation device 70, oil mist included in the blow-by gas is separated by electrostatic adsorption force. Both the positive electrode plate 40 and the negative electrode plate 50 are formed of metal plate materials and provided with a plurality of protruded parts 41, 51 formed by cutting and raising the metal plate materials, respectively.SELECTED DRAWING: Figure 2 【課題】オイルミストの捕集効率を高めること。【解決手段】オイルミストセパレータ１０は、互いに対向する正極板４０及び負極板５０と、電気絶縁材料により形成され、正極板４０と負極板５０との間に設けられたフィルタ６０と、導入口２４及び導出口２５を有し、正極板４０、負極板５０、及びフィルタ６０を収容するケース１１と、正極板４０と負極板５０との間に電圧を印加する電圧発生装置７０とを備え、電圧発生装置７０により正極板４０及び負極板５０の間に電圧が印加されている状態においてブローバイガスを導入口２４から正極板４０及び負極板５０の間を介して導出口２５に向けて流すことにより、当該ブローバイガスに含まれるオイルミストを静電吸着力により分離する。正極板４０及び負極板５０の双方は、金属板材からなるとともに、当該金属板材が切り起こされた複数の突出部４１，５１を備えている。【選択図】図２