EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust manifold assembly for an internal combustion piston engine employs one exhaust tube for each cylinder and a collection chamber for each pair or larger group of exhaust tubes. Each collection chamber is connected to a plurality of exhaust tubes so that the exhaust timing spacing is the same in each collection chamber. The extended axes of the exhaust tubes connected to any one collection chamber intersect within that collection chamber. A single exhaust reaction chamber is fed from pipes carrying the discharge from each collection chamber, and the extended axes of the pipes intersect within the exhaust reaction chamber. The effect is to reduce backpressure and to improve scavenging efficiency while maintaining relatively high exhaust gas temperature for purification efficiency.