THROTTLE BODY AND METHOD OF MANUFACTURING THE SAME

• Main Authors: TATSUKAWA, MASAMI, YOSHIZAKA, MIKIHARU, MASUI, TOSHIYUKI, OZEKI, MASASHI, ASANUMA, HIROSHI, TSUGE, TAKASHI
• Format: Patent
• Language: English; French; Japanese
• Published: 08.12.2005
• Edition: 7
• Subjects: ACTUATING-FLOATS; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; COCKS; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TAPS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A throttle body and a method of manufacturing the throttle body. The throttle body comprises a resin body (3) in which a bore (7) for flowing a suction air therein is formed, a shaft part (20) rotatably supported on the body (3) through a pair of bearing members (24), and a valve body (60) having a resin valve part (4) opening and closing the bore (7). The end faces (67) of the valve part (4) are brought into slidable contact with the end faces (69) of the bearing members (24). At least one end faces (67) and (69) of the valve part (4) and the bearing members (24) brought into slidable contact with each other are formed into easily sliding end faces. The end faces (69) of the bearing members (24) are formed to have a radius (69r) equal to or larger than the radius (68r) of rotating routes (68) drawn by the radial outer ends (67a) of the end faces (67) of the valve part (4). Corps de papillon et procédé de fabrication du corps de papillon. Le corps de papillon comprend un corps en résine (3) dans lequel est formé un alésage (7) permettant l'écoulement d'un air aspiré, une partie d'arbre (20) supportée rotative sur le corps (3) par une paire d'élément d'appui (24) et un corps de soupape (60) comportant une partie de soupape en résine (4) ouvrant et fermant l'alésage (7). Les faces d'extrémité (67) de la partie de soupape (4) sont amenées en contact glissant avec les faces d'extrémité (69) des éléments d'appui (24). Au moins une des faces d'extrémité (67) et (69) de la partie de soupape (4) et les éléments d'appui (24) amenés en contact glissant les uns avec les autres prennent la forme de faces d'extrémité glissant facilement. Les faces d'extrémité (69) des éléments d'appui (24) sont formées de façon à présenter un rayon (69r) supérieur ou égal au rayon (68r) de chemins rotatifs (68) dessinés par les extrémités extérieures radiales (67a) des faces d'extrémité (67) de la partie de soupape (4).