Abstract: In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon, such as ethylene oxide-grafted nylon 6.

Abstract: Apparatus for controlling the operating state of an internal combustion engine (M1), has a demand amount detecting an unit (M2) for detecting amount of demand to the engine, an operating condition varying unit (M3) for varying a condition of operation of the engine, an operating state detecting an unit (M4) for detecting operating state of the engine, a target value setting unit (M5) for determining target values of variables of the operating condition, a control unit (M6) for controlling the operating condition varying unit (M3) by determining feedback amount of the operating condition variables so that detected values equal to the target values.

Abstract: Apparatus for controlling idle speed of an internal combustion engine (M1) equipped with fuel injection valves (M2) comprises a throttle actuator (M4) associated with a throttle valve (M3), engine speed detecting unit (M5), intake air quantity detecting unit (M6), and electronic control unit (M8) for controlling the fuel injection valves (M2) and the throttle actuator (M4). The electronic control unit (M8) comprises a target idle speed setting unit (M9), a target intake air quantity setting unit (M10), and an integral-added optimal regulator (M11) for determining feedback amounts respectively in connection with the amount of fuel to be injected and the opening degree of the fuel injection valves. In such apparatus, target intake air quantity is determined as a value which makes fuel supply amount minimum on the basis of correlation between intake air quantity and fuel supply amount when the target idle speed is made constant.

Abstract: A process of producing a porous thermoplastic resin article in the form of hollow yarn or film which comprises a step for forming a large number of micropores in the article by drawing an article, which is characterized in that the drawing process is performed in a medium selected from the group consisting of nitrogen, oxygen, argon, carbon monoxide and a hydrocarbon such as methane or ethane at a temperature in the range of the freezing point to 50.degree. C. above the boiling point of said medium.