EXHAUST MANIFOLD FOR MULTIPLE CYLINDER ENGINE

• Main Author: OTSUKA KIMITERU
• Format: Patent
• Language: English
• Published: 13.05.1997
• Edition: 6
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To restrain the shrinkage and warpage of the collecting pipe of an exhaust manifold by adding a rib type and/or corrugated reinforcement member lengthwise to at least one or more parts of the manifold pipe. SOLUTION: The exhaust manifold 7 of a 5-cylindered engine has branch pipes 5 for the inflow of exhaust gases from each cylinder head, and a manifold pipe 2 for collecting exhaust gases from each branch pipe 5. Also, the exhaust manifold 7 has mounting flanges 4 for connection to the cylinder heads and a manifold part 6 for an exhaust component such as a turbine housing. Regarding such a manifold 7, a rear rib 3 is provided on the upper part of the manifold pipe 2, together with a jointing rib 1 beneath between the mounting flanges 4 along the lengthwise direction of the manifold pipe 2, respectively as reinforcement members. As a result, the bending of the manifold part 6 is restrained and the warpage of the mounting flanges 4 is also restrained, thereby keeping proper airtightness between the exhaust manifold 7 and the cylinder heads over a long term.