CATALYST CASE INTEGRATED TYPE EXHAUST MANIFOLD AND MANUFACTURING METHOD OF THE SAME

• Main Author: UCHIKAWA YOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 30.03.2015
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; STEAM ENGINES; TRANSPORTING; WEAPONS; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PROBLEM TO BE SOLVED: To provide a catalyst case integrated type exhaust manifold having a fewer number of components than a conventional one and capable of reducing production cost by reducing welding points and the like, and a manufacturing method of the same.SOLUTION: A catalyst case integrated type exhaust manifold (manifold converter) includes an exhaust manifold part 1 and a catalyst case part 5. The catalyst case part 5 includes: a substantially cylindrical case body 6 for holding a catalyst carrier; a cone 7 for connecting the case body 6 and the exhaust manifold part 1; and an outlet side shell 8 connected to a downstream side of the case body 6. The exhaust manifold part 1 and the catalyst case part 5 are formed by press working of a tailored blank material 30 comprising by welding at least two pieces of metal blank sheets (31, 32) different in material quality and/or plate thickness. In addition, the exhaust manifold part 1 and the cone 7 of the catalyst case part are formed by the same metal blank sheet (31) out of the plurality of metal blank sheets configuring the tailored blank material 30. 【課題】従来よりも部品点数が少なく、溶接箇所を減らす等して製造コストを低減可能な触媒ケース一体型排気マニホルドおよびその製造方法を提供する。【解決手段】触媒ケース一体型排気マニホルド（マニホルドコンバータ）は、排気マニホルド部１および触媒ケース部５を備える。触媒ケース部５は、触媒担体を保持するための略円筒状のケース本体６、当該ケース本体６と排気マニホルド部１とを連結するコーン７、および、ケース本体６の下流側に連結された出口側シェル８を備える。排気マニホルド部１および触媒ケース部５は、材質及び／又は板厚が異なる少なくとも二枚の金属素板（３１，３２）を溶接してなるテーラードブランク材３０のプレス加工により形成される。加えて、排気マニホルド部１と触媒ケース部のコーン７とが、前記テーラードブランク材３０を構成する複数の金属素板のうちの同一金属素板（３１）で形成されている。【選択図】図５