Abstract: A gas-liquid separator comprises a pipe member through which a gas-liquid two-phase fluid flows, the gas-liquid two-phase fluid comprising gas and liquid, and a swirling flow generator within the pipe member, the swirling flow generator being configured to swirl the gas-liquid two-phase fluid to separate the gas and the liquid therefrom. The swirling flow generator comprises blades that extend spirally about a central axis of the pipe member. Each of the blades comprises a distal end in a pipe radial direction of the pipe member. The distal ends are continuous over an entire circumference of the pipe member when the pipe member is viewed from an axial direction thereof. A communication portion is provided between the pipe member and the swirling flow generator. The communication portion is configured to communicate a first space upstream of the swirling flow generator with a second space downstream of the swirling flow generator.

Abstract: A steel pipe for a fuel injection pipe has a chemical composition consisting of, by mass %: C: 0.17 to 0.27%, Si: 0.05 to 0.40%, Mn: 0.30 to 2.00%, P: 0.020% or less, S: 0.0100% or less, O: 0.0040% or less, Ca: 0.0010% or less, Al: 0.005 to 0.060%, N: 0.0020 to 0.0080%, Ti: 0.005 to 0.015%, Nb: 0.015 to 0.045%, Cr: 0 to 1.00%, Mo: 0 to 1.00%, Cu: 0 to 0.50%, Ni: 0 to 0.50%, V: 0 to 0.15%, and the balance: Fe and impurities. The metal micro-structure consists substantially of tempered martensite, or tempered martensite and tempered bainite. A prior-austenite grain size number is 9.0 or more. The hardness is within the range of 350 to 460 HV1. When a maximum value of a square root of an area of inclusions observed in a cross section perpendicular to a longitudinal direction of the steel pipe is taken as an (n=1 to 20), a maximum value amax of an is 30.0 ?m or less, and an average value aav of an is 40% or more of amax.

Abstract: A steel pipe has a composition consisting, by mass percent, of, C: 0.12 to 0.27%, Si: 0.05 to 0.40%, Mn: 0.3 to 2.0%, Al: 0.005 to 0.060%, N: 0.0020 to 0.0080%, Ti: 0.005 to 0.015%, Nb: 0.015 to 0.045%, Cr 0 to 1.0%, Mo: 0 to 1.0%, Cu: 0 to 0.5%, Ni: 0 to 0.5%, V: 0 to 0.15%, and B: 0 to 0.005%, the balance being Fe and impurities. As impurities, contents are Ca: 0.001% or less, P: 0.02% or less, S: 0.01% or less, and O: 0.0040% or less. The micro-structure is tempered martensitic or tempered martensite and tempered bainite, in which a prior-austenite grain size number is 10.0 or more. Tensile strength is TS 800 MPa or higher. Critical internal pressure is [0.3?TS?a] or more, a=[(D/d)2?1]/[0.776?(D/d)2], D: pipe outer diameter (mm), d: pipe inner diameter (mm).

Abstract: To obtain a gasoline direct injection rail provided with an inlet capable of reducing pressure pulsation without increasing the inner diameter of a high-pressure pipe even when the pressure of a system is increased. A gasoline direct injection rail comprises an inlet 2, 21 at a first end 15, 34 of a rail body 1, 20, wherein an orifice 12, 31 is provided inside the rail body 1, 20, the inlet 2, 21 has a fuel flow passage 4, 23, and a hollow part 8, 27 is provided between the fuel flow passage 4, 23 and the orifice 12, 31.

Abstract: The flexibility of the attachment angle and attachment interval of the member (e.g., injector) attached to the joint member is increased to improve the flexibility of layout even in the case of the forged rail for high-pressure direct injection. In addition, the manufacturing cost can be reduced while keeping high strength of the joint portion. A rail body 1 manufactured by forging, the rail body 1 having a through hole 4 opened on a wall surface 3 for communicating a fuel passage 2 extending in an axial direction with an outside; and a tubular joint member 6 manufactured separately from the rail 1 body and fixed to the rail body 1 at a position of the through hole 4 for allowing a fuel to flow from the fuel passage 2 through the through hole 4 are provided.

Abstract: A gas-liquid separator includes a cylindrical inlet pipe and a fluid inflow pipe. The inlet pipe includes a fluid inlet which is formed in a fluid entering side and radially opens. An axis line of the inlet pipe horizontally extends. The fluid inflow pipe includes at an end a connection opening connected to the fluid inlet. An axis line of the fluid inflow pipe horizontally extends. The fluid inflow pipe introduces the gas-liquid two-phase fluid through the fluid inlet from a side of the inlet pipe. In a connecting portion, a position of an axis line extending through a center of a connection opening in communication with the fluid inlet is vertically offset with respect to a position of the axis line of the inlet pipe.

Abstract: A gas-liquid separator includes an inlet pipe and an inner pipe. The inlet pipe includes a swirling flow generating member therewithin, and a first drain port through which the liquid exits. The inner pipe includes an opening at an end which is inserted into an end of the inlet pipe. The swirling flow generating member includes a vane supporting portion extending along an axis line of the inlet pipe, and stator vanes provided on an outer circumferential surface of the vane supporting portion. The vane supporting portion has a conical shape whose diameter gradually increases from a fluid entering side to a fluid exiting side of the gas-liquid two-phase fluid. The stator vanes surround the outer circumference with inclining relative to the axis line of the inlet pipe.

Abstract: A steel pipe for fuel injection pipe has a tensile strength of 500 to 900 MPa and a yield ratio of 0.50 to 0.85, and has a critical internal pressure (IP) satisfying [IP?0.41×TS×?] (?=[(D/d)2?1]/[0.776×(D/d)2], where TS: tensile strength (MPa) of the steel pipe, D: steel pipe outer diameter (mm), and d: steel pipe inner diameter (mm)), wherein a circumferential-direction residual stress on an inner surface of the pipe is ?20 MPa or lower after the steel pipe is split in half in a pipe axis direction.

Abstract: To obtain a gasoline direct injection rail in which a large load is unlikely to be concentrated on a boundary part between a rail body and an end cap, and damage to the boundary part can be prevented, even when high pressure is applied to the inside of the rail body. The gasoline direct injection rail comprises an end cap 4 composed of a top plate 5 and a circumferential wall 6, and a rail body 1 having an end part 2 in which the circumferential wall 6 of the end cap 4 is inserted and placed, wherein an inner circumference of the end part 2 of the rail body 1 has a depression 3, the circumferential wall 6 is placed in the depression 3, and there is no level difference at a boundary part 12 between an inner circumferential surface 11 of the circumferential wall 6 and an inner circumferential surface 10 of the rail body 1.

Abstract: To obtain, at low cost, a fuel rail that maintains low hardness and good formability before being formed into a tube stock, can be made to form a welded pipe, and has high-strength properties with which the fuel rail can withstand a high fuel pressure even when formed so as to be relatively thin. A fuel rail for gasoline direct injection that is used at a fuel pressure of at least 30 MPa and is formed from an iron-alloy welded pipe. The fuel rail comprises an iron alloy that contains chemical components of C, Si, Mn, P, S, Nb, and Mo. The plate thickness t and the outer diameter D of the fuel rail have a ratio t/D of 0.2 or less. A bainitic structure can be precipitated by brazing the fuel rail in a furnace during manufacturing.

Abstract: The present invention aims for obtaining a fuel rail for gasoline direct injection which can be used for the direct injection at a high fuel pressure of 50 MPa or more by increasing the thickness at the portion near the branch hole and using the material having high thickness for the metal seal portion while keeping the weight light and keeping the cost low. A fuel rail for gasoline direct injection made of steel and used at a fuel pressure of 50 MPa or more, the fuel rail having: a plurality of block members 2; and a pipe member 1 which connects an interval between the block members, wherein the block members 2 have: a branch hole 3 which communicates with the pipe member 1; and a metal seal portion 6 to which an injector is connected, and the hardness of the block members 2 is higher than the hardness of the pipe member 1.

Abstract: A swirling flow generator for gas-liquid separation includes a swirling flow generating ribbon for swirling a gas-liquid two-phase fluid flowing through a pipe to guide a liquid toward an inner surface of the pipe by centrifugal force. A terminal end of the swirling flow generating ribbon where the gas-liquid two-phase fluid is to flow out includes a first terminal edge and a second terminal edge. The first and second terminal edges connect a first terminal end point, a second terminal end point, and a middle terminal end point. The first terminal end point is in a first of radially outward ends and the second terminal end point is in a second of the radially outward ends. The middle terminal end point is closer to a side where the gas-liquid two-phase fluid is to flow in than the first and second terminal end points and is on an axial line.

Abstract: A gas-liquid separator includes an inlet pipe and an inner pipe. The inlet pipe receives a swirling flow generating ribbon, and includes an exhaust port through which a separated gas flows out and a drain port through which a separated liquid flows out. The outer diameter of the inner pipe is smaller than the inner diameter of the inlet pipe. An end of the inner pipe is inserted into the exhaust port and is open at a location downstream of the swirling flow generating ribbon. A terminal end of the swirling flow generating ribbon includes a first terminal edge and a second terminal edge. The first and second terminal edges connect a first terminal end point, a second terminal end point, and a middle terminal end point.

Abstract: To obtain an end cap that enables a brazing material ring to be appropriately placed and brazing to be reliably performed when inserting and placing an insertion part of the end cap in an end part of a rail body and securing the end cap by brazing it with the brazing material ring and, also, that is unlikely to result in a broken rail body when internal pressure is applied. An end cap to be inserted into and placed inside an end part of a rail body 2 and secured to an inner circumference of the rail body 2 by brazing, wherein an outer circumference of an insertion part 3 for insertion into the rail body 2 comprises an engagement groove 10 that is composed of a pair of side surfaces 11, 12 and a bottom surface 13 and that is capable of engagement with a brazing material ring 15.

Abstract: PROBLEM: To provide a large device and a method which is advantageous for forming a large-area amorphous film. SOLUTION: A device of the invention sprays a flame including a particulate material with a spraying machine toward a substrate, melts the material with the flame, and cools the material and flame by cooling gas before they reach the substrate to form an amorphous film. The spraying machine has particulate material spraying ports and flame spraying ports such that the flame including the material has an oblong cross section. Inert gas spraying ports are successively placed on both sides across the ports of the material and flame. Mist spraying ports are successively placed on both sides across the ports for the material, flame and inert gas. A skirt is attached/detached depending on a combustion gas or a film width to restrain film width narrowing and increase of film thickness deviation.