Abstract: An optical film having both high flexibility and high hardness, and having reduced curl is provided. The optical film includes a polyimide base material and a hard coat layer is laminated thereon, wherein the hard coat layer is composed of a cured film of polysiloxane having a cation-polymerizable organic functional group, and when the optical film is cut into a rectangular shape having a short side with a length of 50 mm parallel to the machine direction and a long side with a length of 150 mm parallel to the transverse direction perpendicular to the machine direction, and the cut sample is placed on a flat surface, then, the average value of the distance between both ends of one short side and the distance between both ends of the other short side is 18 mm or more.

Abstract: A method of finishing spray-holes bored by machining in the body of a fuel injection nozzle for an IC engine by removing burrs that remain after machining around the inside mouth of each spray-hole. Employed is electrolytic polishing process wherein the nozzle body is made the anode. A tubular electrode having an insulator cover is inserted into the nozzle body, and electrolyte liquid is supplied through the tubular electrode to flow out through the spray-holes. An end portion of the insulator cover completely covers the tip portion of the electrode and comes into close contact with the inner surface of the nozzle body over an area in which the spray-holes are open. In the insulator cover, liquid passages are formed so as to inject the electrolyte liquid only at the location of the mouth of each spray-hole to thereby prevent dissolution of the nozzle body inner surface in unwanted areas. Accordingly the removal of the burrs is achieved without increasing the volume of dead space in the nozzle body.

Abstract: The present invention features a modified Saurer type direct injection Diesel engine wherein the fuel injector is offset to one side of the cylinder bore axis and a lip is provided about the upper periphery of the cavity which generates a sufficiently strong squish and reverse squish as to entrain and disperse the fuel (viz., macro-mix) which is injected along the forshortened injection trajectories and prevent wetting of the cavity wall. The lip is further arranged to permit the finely divided low inertia and kinetic energy fuel droplets (micro-mixed) of the fuel which is injected along the elongate injection trajectories to be drawn out of the cavity under the influence of the reverse squish and thus obviate any delay in combustion.