Abstract: A drive belt system of a hybrid engine, may include a crankshaft pulley that may be disposed to be rotated by an engine, a hybrid starter generator (HSG) pulley that may be disposed with a distance from the crankshaft pulley and may be coupled to and rotated by a HSG that selectively starts the engine and generates electricity, an idler pulley that may be rotatably disposed at a position with a distance outwards from a first tangential line passing the crankshaft pulley and the, a drive belt that the crankshaft pulley, the and the idler pulley may be wrapped by the interior circumference thereof, a mechanical auto tensioner (MAT) that pushes the drive belt between the crankshaft pulley and the inwards from a second tangential line passing the crankshaft pulley and the to sustain the tension of the drive belt, and a hydraulic auto tensioner that pushes the drive belt between the crankshaft pulley and the idler pulley inwards to sustain the tension.

Abstract: Disclosed herein is a method of fabricating a high-pressure gas cylinder, the method comprising providing a cylinder body having at least one opened end portion, providing a gas for preventing oxide film-formation on an inner surface of the cylinder body, heating the opened end portion of the cylinder body, and reducing an opened area of the opened end portion by compressing the opened end portion. In the process for deforming or deforming end portions of the cylinder body, the oxide film is prevented from being formed on the inner surface of the cylinder body and the cylinder body is plastic-deformed, thereby preventing the plated layer having been formed from being damaged.

Abstract: A method and apparatus for plating a threaded portion of a high pressure gas cylinder is provided. The method includes: providing a high pressure gas cylinder having a gas containing portion and a threaded portion being formed on a top of the gas containing portion; locating an anode pipe, in which a plating solution passage is formed, inside the threaded portion; forming a closed chamber containing the threaded portion and the anode pipe; forming a flux of the plating solution inside the closed chamber; and forming a voltage difference between the anode pipe and the threaded portion, and plating the threaded portion.