Abstract: The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 ?m, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss We and hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.

Abstract: The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 ?m, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss We and hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.

Abstract: The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 ?m, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss We and hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.

Abstract: An intake control device for an engine includes a throttle body that defines a throttle bore, which is substantially circular-shaped in cross section, through which intake air flows. A throttle valve is rotatably assembled in the throttle bore of the throttle body. The throttle valve rotates integrally with a shaft. One axial end of the shaft is connected to a rotary driver, so that the rotation angle of the throttle valve is changed via the shaft. The rotary driver defines a fitted hole, to which the one axial end of the shaft is clearance fitted. The rotary driver defines a fitting recess dented radially outward from the hole wall surface of the fitted hole. The one axial end of the shaft includes a coupling that is crimped and fixed to the rotary driver in the state of being fitted to the fitted hole.

Abstract: An electrically controlled throttle apparatus is constructed with a throttle body and a throttle valve that are simultaneously formed in the same dies. The throttle valve is rotatably assembled in a bore wall part of the throttle body while the throttle valve is rotated by a predetermined rotation angle ? with respect to a rotation angle 0° corresponding to its full close position. Besides, a clearance is formed between the throttle body and the throttle valve around a portion in the vicinity of a throttle shaft of the throttle valve and a shaft hole of the throttle body. Furthermore, a joint is inserted between the throttle shaft and the shaft hole in the forming process thereof. Thus, the throttle body and the throttle valve can be separated by the molding dies and the joint, and the throttle body and the throttle valve can be prevented from welding to each other in a forming process thereof.

Abstract: A throttle shaft, first and second bearings, are inserted and formed in a bore wall part of a throttle body, when the throttle body is formed in the same dies. That is, when the throttle body is formed in a predetermined shape, the throttle shaft, the first and second bearings, are received in the bore wall part of the throttle body. First and second step portions, are formed in the throttle shaft, and axially inserted by first and second supporting portions, respectively formed in the first and second bearings, from both axially ends of the throttle shaft. Therefore, the throttle shaft can be restricted from moving axially, without additional thrust restricting means, such as an E-ring and a C-ring.

Abstract: A throttle apparatus includes a throttle body having a motor insertion hole in which a motor is received. The throttle body has an undercut groove perpendicularly extending with respect to the axial direction of the motor around the insertion hole. A metallic plate is inserted into the undercut groove, so that a motor engaging hole formed in the metallic plate is attached to the throttle body, and a motor engaging hole formed in the metallic plate engages with the motor. A sensor cover is attached to the metallic plate, so that a notch formed in the metallic plate engages with an engaging boss integrally formed in the sensor cover to steadily receive a motor, such that the motor is restricted in the axial direction of the motor and in a direction which is perpendicular to the axial direction of the motor.

Abstract: An intake control device for an engine includes a throttle body that defines a throttle bore, which is substantially circular-shaped in cross section, through which intake air flows. A throttle valve is rotatably assembled in the throttle bore of the throttle body. The throttle valve rotates integrally with a shaft. One axial end of the shaft is connected to a rotary driver, so that the rotation angle of the throttle valve is changed via the shaft. The rotary driver defines a fitted hole, to which the one axial end of the shaft is clearance fitted. The rotary driver defines a fitting recess dented radially outward from the hole wall surface of the fitted hole. The one axial end of the shaft includes a coupling that is crimped and fixed to the rotary driver in the state of being fitted to the fitted hole.

Abstract: A powdered core made by compacting of a mixture of iron powder and resin powder of insulating binder, wherein the iron powder is composed of atomized iron powder and reduced iron powder, and the resin powder is any one of thermosetting polyimide powder, a mixture of both thermosetting polyimide powder and polytetrafluoroethylene powder, thermoplastic polyimide powder, and a mixture of both thermoplastic polyimide powder and polytetrafluoroethylene powder, which is followed by heat treatment, thereby obtaining a powdered core having high magnetic flux density, low iron loss, and having excellent machinability in shaping, cutting or drilling without forming any,defects such as chipping or cracks.

Abstract: The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 ?m, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss We and hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.

Abstract: A throttle apparatus includes a throttle body having a motor insertion hole in which a motor is received. The throttle body has an undercut groove perpendicularly extending with respect to the axial direction of the motor around the insertion hole. A metallic plate is inserted into the undercut groove, so that a motor engaging hole formed in the metallic plate is attached to the throttle body, and a motor engaging hole formed in the metallic plate engages with the motor. A sensor cover is attached to the metallic plate, so that a notch formed in the metallic plate engages with an engaging boss integrally formed in the sensor cover to steadily receive a motor, such that the motor is restricted in the axial direction of the motor and in a direction which is perpendicular to the axial direction of the motor.

Abstract: A throttle shaft, first and second bearings, are inserted and formed in a bore wall part of a throttle body, when the throttle body is formed in the same dies. That is, when the throttle body is formed in a predetermined shape, the throttle shaft, the first and second bearings, are received in the bore wall part of the throttle body. First and second step portions, are formed in the throttle shaft, and axially inserted by first and second supporting portions, respectively formed in the first and second bearings, from both axially ends of the throttle shaft. Therefore, the throttle shaft can be restricted from moving axially, without additional thrust restricting means, such as an E-ring and a C-ring.

Abstract: An electrically controlled throttle apparatus is constructed with a throttle body and a throttle valve that are simultaneously formed in the same dies. The throttle valve is rotatably assembled in a bore wall part of the throttle body while the throttle valve is rotated by a predetermined rotation angle ? with respect to a rotation angle 0° corresponding to its full close position. Besides, a clearance is formed between the throttle body and the throttle valve around a portion in the vicinity of a throttle shaft of the throttle valve and a shaft hole of the throttle body. Furthermore, a joint is inserted between the throttle shaft and the shaft hole in the forming process thereof. Thus, the throttle body and the throttle valve can be separated by the molding dies and the joint, and the throttle body and the throttle valve can be prevented from welding to each other in a forming process thereof.

Abstract: A first compact (11) is molded by injection according to the MIM method in which a molding material composed of a mixture of metal powder and a binder is injected into a die for molding, after which a second compact (12) is molded by injection in close contact with the joining surface (110) of the first compact (11) thereby to fabricate a metal composite compact (1). The second compact (12) is molded by injection by making it flow and fill a die (8) in such a manner as to obtain a flow component (R) in the direction parallel to the joining surface (110) of the first compact (11) on the same joining surface (110). In a method according to another embodiment, cavity surfaces (60, 61) formed on a reference die (50) and a first replacement die (51), respectively, are placed in opposed relation to each other thereby to form a first cavity (71), in which the first compact (11) is molded by injection.

Abstract: A catalytic converter is disclosed, which incorporates an improved mechanism to supply a part of a make-up gas for temperature control. A plurality of stages of a gas injection device are provided in the main body of the catalytic converter, each of the stages of the gas injection rings consisting of a plurality of gas injection rings concentrically arranged therein. Each of the gas injection rings is interconnected through connecting tubes to each of the small chambers which corresponds to each of the stages of the gas injection rings and is provided in a make-up gas supply chamber.