Abstract: A fuel pressure pulsation suppressing system of a fuel piping system for a gasoline engine having a plurality of cylinders disposed in a straight, V-shape or horizontal opposed shape with delivery pipes for distributing fuel to the cylinders of return-less type without a return circuit to a fuel tank, wherein the cross section of at least one of communication pipes forming the delivery pipes forms a flexible absorbing face, an orifice portion for damping pressure pulse wave caused by fuel injection is installed near a connection part between at least one delivery pipe and a supply pipe or a connection pipe, and the cross sectional area of the flow passage of the orifice should desirably be 0.2 times the sectional area of the flow passage of the connection pipe or the supply pipe or below.

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine includes an elongated conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. One wall of the conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface. A high-frequency noise suppressing component such as a rib, a cavity or a clamp is applied to the one wall opposite to the absorbing surface. Thus, fuel pressure pulsations and shock waves are reduced by bending the absorbing surface, and emission of high-frequency noise is eliminated.

Abstract: A fuel rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. This assembly comprises an elongated conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of the conduit, and a plurality of branch pipes. The basal end of each branch pipe is adapted to communicate with the fuel passage. The distal end of each branch pipe is provide with a connecting member for connecting to a tip of a fuel injector. The wall of the conduit is provided with holes for receiving the basal ends of the branch pipes. Around each hole an inner collar and an outer collar are integrally formed with the conduit wall, and each branch pipe is fixed to the collars by brazing or welding. The drilling work is performed by a special drilling tool.

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. The assembly includes an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. One wall of the conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface. A high-frequency noise suppressing device such as a binding member is fixed within the conduit for connecting the one wall and the socket mounting wall. The binding member includes is comprised of a pipe, a bar or a rigid block. The binding member may be a body portion of an extending socket terminating with the one wall. Thus, fuel pressure pulsations and shock waves are reduced by bending of the absorbing surface, and emission of high-frequency noise is eliminated.

Abstract: Connection structure for connecting a piping used in automobiles or the like to a ring joint for providing highly reliable gas-tightness. The ring joint includes a ring joint body including a fitting hole for an eyebolt, the fitting hole being piercingly formed in an axial core portion of the ring joint body and in continuation from an annular recessed groove formed inside the ring joint body, and a flow path extending in a direction perpendicular to and intersecting with the fitting hole. A branch pipe is formed as a unitary body with the ring joint body and arranged in a direction perpendicular to and intersecting with the eyebolt. A piping for insertion into the branch pipe has an outer peripheral surface covered with resin, and the resin of the outer peripheral surface of the piping and an inner peripheral surface of the branch pipe are fixedly welded to one another.

Abstract: A temperature-controlled fluid friction coupling is actuated by a flow of viscous fluid flowing into or out of shearing surface gaps disposed therein. An, the actuating pin is movable in a direction parallel to a surface of a partition. A swing-type valve lever is in contact with the actuating pin near a root end of the valve lever, and a swing end of the valve lever is arranged slidably movable while in contact with a surface of the partition having a valve opening therein. In response to a deformation of the temperature sensitive element caused by a change of air temperature, the actuating pin moves in a direction parallel to the surface of the partition, and then the swing end of the valve lever moves so as to open and close the valve opening. Thus, the fluid flow from a reservoir chamber to a torque transmitting chamber is controlled.

Abstract: A returnless type fuel delivery pipe is provided for each cylinder bank of an opposed type engine. A connecting pipe is connected to this pair of fuel delivery pipes, a supply pipe is connected to this connecting pipe, thus coupling the fuel delivery pipes with the fuel tank. The fuel delivery pipes are made to be capable of absorbing and reducing pressure pulsation through elastic deformation of the external walls thereof, and the supply pipe is connected to an intermediate section of the length of the connecting pipe. Pressure pulsations with opposite phases caused by fuel injection of the fuel delivery pipes interfere with and attenuate each other in the supply pipe at or near intersection thereof with the intermediate section of the connecting pipe.

Abstract: A jig for heat treatment of a workpiece capable of use over a long period of time by minimizing or eliminating deformation thereof caused by thermal distortion and which is capable of performing heat treatment of the workpiece by reducing the amount of heat energy absorbed by the jig in a heat-treatment furnace. The jig includes an outer peripheral frame formed by a plurality of members and a mounting portion arranged inside the outer peripheral frame and also formed by a plurality of members. The workpiece rests on the mounting portion during use. The members of the outer peripheral frame and mounting portion are movably connected to each other with an expansion space being provided between each adjacent member capable of absorbing thermal expansion of the member during thermal treatment.

Abstract: As an efficient and economical bonding method indispensable for the bonding between dimension-small constituent elements (members, parts) to manufacture a minute (micro) structure, a micromachine, etc. is provided a bonding method using a capillary condensation effect characterized in that in order to bond at least two separated bonding targets (works) at a prescribed joint point, the bonding targets are disposed under an atmosphere comprising a prescribed vapor pressure of adhesive agent, and the adhesive agent is subjected to capillary condensation at the joint point to thereby form uniform meniscus and bond the bonding targets (works) by the adhesive agent constituting the meniscus.

Abstract: The invention provides a metal honeycomb core body used as the principal structural element of an exhaust gas cleaning unit excellent in various performances and economy that is provided with a corrugated band member, that is a structural member of a metal honeycomb core body having a special waveform structure. The invention provides a metal honeycomb core body having honeycomb structure fabricated by bringing corrugated band members (1) and planar band members (2) made of thin-walled metal sheet alternately into contact. The corrugated band member (1) has a waveform structure obtained by using a waveform of an imaginary corrugated sheet (1′) having crests and troughs which are in contact with a planar band member (2) and composed of a connected waveform having a desired waveheight (h) and one period length (&lgr;′).

Abstract: A method of fabricating a multiple coat metal pipe includes a first layer comprising a resin having an adhesive force extruded on a surface treatment layer on an outer peripheral face of a metal pipe and a second layer comprising a resin having a chipping resistance extruded on an outer peripheral face of the first layer providing a coating on the first layer in a substantially non-adhesive state. In the substantially non-adhesive state, a peel off strength between the first layer and a second layer is 75 g/cm or less and the peel off strength enables the second layer to be peeled off from the first layer without peeling off the first layer. The first layer has a different dissolving performance than the second layer and the second layer is extruded at a temperature equal to or higher than a melting point of the first layer.

Abstract: To provide a multiple coat metal pipe and its fabrication method having excellent corrosion resistance without deteriorating chipping resistance or splashing resistance, capable of being fabricated easily and capable of simply carrying out peel off operation owing to a weak peel off strength wherein corrosion resistance of an end working portion is not deteriorated, there is provided a multiple coat metal pipe which is a metal pipe constituted by multiplexing and coating a first layer including a resin having an adhesive force in respect of a surface treatment layer formed on an outer peripheral face of the metal pipe and capable of being extruded and a second layer provided on an outer peripheral face of the first layer, having a chipping resistance and capable of being extruded, wherein a peel off strength between the first layer and the second layer is 75 g/cm or less.

Abstract: A heat and corrosion resistant steel pipe having multi-layered coating comprising a steel pipe, a Zn—Ni alloy plating layer deposited to the outer surface of the steel pipe and a polyvinyl fluoride layer formed on the Zn—Ni alloy plating layer with an epoxy resin therebetween as an intermediate layer. A metal plating layer comprising Zn—Ni plating layer and Ni-plating layer may be used instead of the Zn—Ni plating layer. A chromate layer may be formed on the metal plating layer.

Abstract: To provide a multiple coat metal pipe and its fabrication method having excellent corrosion resistance without deteriorating chipping resistance or splashing resistance, capable of being fabricated easily and capable of simply carrying out peel off operation owing to a weak peel off strength wherein corrosion resistance of an end working portion is not deteriorated, there is provided a multiple coat metal pipe which is a metal pipe constituted by multiplexing and coating a first layer including a resin having an adhesive force in respect of a surface treatment layer formed on an outer peripheral face of the metal pipe and capable of being extruded and a second layer provided on an outer peripheral face of the first layer, having a chipping resistance and capable of being extruded, wherein a peel off strength between the first layer and the second layer is 75 g/cm or less.

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. The assembly comprises an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. Outer walls of the conduit include at least one flat or arcuate flexible first absorbing surface, which is smoothly and integrally connected to an arcuate second absorbing surface. The first absorbing surface or the second absorbing surface faces fuel inlet ports of the sockets. The sectional configuration of the conduit can be flat, a telephone receiver shape, a character “T” shape, a corrugation shape, a dumbbell shape or a reverse eye mask shape. Thus, fuel pressure pulsations and shock waves are reduced by abrupt enlargements of fuel passages and bendings of the absorbing surfaces.

Abstract: A temperature control device for a constant temperature chiller unit or a vending machine is provided. Thermal medium fluid such as water in the chiller unit is accurately controlled under starting mode, heating mode and cooling mode. Thermal medium fluid such as air in the vending machine is conveniently controlled in winter mode and summer mode. In the device, a heat exchanger is interposed within a compression circuit, and a bypass circuit is disposed at the downstream side of a pump so that through the bypass circuit thermal medium fluid receives heat from the heat exchanger. Thus, the temperature of thermal medium fluid supplied to an external secondary heat load is controlled.

Abstract: To provide a multiple coat metal pipe and its fabrication method having excellent corrosion resistance without deteriorating chipping resistance or splashing resistance, capable of being fabricated easily and capable of simply carrying out peel off operation owing to a weak peel off strength wherein corrosion resistance of an end working portion is not deteriorated, there is provided a multiple coat metal pipe which is a metal pipe constituted by multiplexing and coating a first layer including a resin having an adhesive force in respect of a surface treatment layer formed on an outer peripheral face of the metal pipe and capable of being extruded and a second layer provided on an outer peripheral face of the first layer, having a chipping resistance and capable of being extruded, wherein a peel off strength between the first layer and the second layer is 75 g/cm or less and further, there is provided a method of fabricating a multiple coat metal pipe, wherein a first layer including a resin having an adhesiv

Abstract: To provide a multiple coat metal pipe and its fabrication method having excellent corrosion resistance without deteriorating chipping resistance or splashing resistance, capable of being fabricated easily and capable of simply carrying out peel off operation owing to a weak peel off strength wherein corrosion resistance of an end working portion is not deteriorated, there is provided a multiple coat metal pipe which is a metal pipe constituted by multiplexing and coating a first layer including a resin having an adhesive force in respect of a surface treatment layer formed on an outer peripheral face of the metal pipe and capable of being extruded and a second layer provided on an outer peripheral face of the first layer, having a chipping resistance and capable of being extruded, wherein a peel off strength between the first layer and the second layer is 75 g/cm or less and further, there is provided a method of fabricating a multiple coat metal pipe, wherein a first layer including a resin having an adhesiv

Abstract: A high-pressure fuel injection pipe for a diesel engine includes a fuel pipe main body with opposed first and second ends. First and second fastening nuts are mounted over the first and second ends. A first unitary outer pipe is mounted over a portion of the fuel pipe main body and is mounted to the first fastening nut. A second unitary outer pipe is mounted over a portion of the fuel pipe main body and has an end mounted to the second fastening nut. The end of the second outer pipe is spaced from the second fastening nut is expanded circumferentially and telescoped over a portion of the first outer pipe. A sealing ring is sealingly engaged between the first and second outer pipes.

Abstract: A connector is provided for connecting a conductive resin tube to a metal pipe. The connector includes a front end for insertion into the conductive resin tube and a rear end defining a chamber for accommodating an end of the metal pipe. A support member is disposed in the connector for supporting the front end of the resin connector. The support member has a front end that engages the inner surface of conductive resin tube and a rear end that engages the metal pipe.