EXHAUST MANIFOLD

• Main Author: MIYAJI YOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 03.08.2015
• 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; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To provide an exhaust manifold which can suppress an increase in a pressure loss in an exhaust system of an engine.SOLUTION: In an exhaust manifold 1, branch pipes 1a to 1d connected to cylinders #1 to #4 of an in-line four-cylinder engine 2 are connected to an aggregate part 5, and a sensor 6 is inserted into the aggregate part 5. The branch pipes 1a to 1d are divided into a first group composed of the branch pipes 1a, 1b, and a second group composed of the branch pipes 1c, 1d which are different from the branch pipes 1a, 1b of the first group. Then, the branch pipes 1a, 1b are arranged while adjoining each other in parallel in an insertion direction of the sensor 6. Furthermore, the branch pipes 1c, 1d are arranged while adjoining each other in parallel in the insertion direction of the sensor 6 in positions symmetric with respect to the branch pipes 1b, 1c of the first group with a straight line L extending in the insertion direction of the sensor 6 as a center. An interval between the branch pipes 1a, 1d is set wider than an interval between the branch pipes 1b, 1c. 【課題】エンジンの排気系における圧力損失の増大を抑制することができるエキゾーストマニホールドを提供する。【解決手段】エキゾーストマニホールド１では、直列四気筒のエンジン２の気筒＃１〜＃４に接続される枝管１ａ〜１ｄが集合部５に繋がり、同集合部５にはセンサ６が挿入される。枝管１ａ〜１ｄは、枝管１ａ，１ｂからなる第１組、及び、その第１組の枝管１ａ，１ｂとは別の枝管１ｃ，１ｄとからなる第２組に分けられる。そして、枝管１ａ，１ｂは、センサ６の挿入方向について並列に且つ隣接するように設けられる。また、枝管１ｃ，１ｄは、センサ６の挿入方向に延びる直線Ｌを中心とした第１組の枝管１ｂ，１ｃに対する対称位置にて、センサ６の挿入方向について並列に且つ隣接するように設けられる。枝管１ａ，１ｄ同士の間隔は、枝管１ｂ，１ｃ同士の間隔よりも広くされる。【選択図】図１