Exhaust manifold for multi-cylinder engine with secondary air input, in which secondary air is introduced into exhaust gas via several venturi sectors

摘要

The exhaust manifold (1) includes a flange (2) and several exhaust tubes (3). The secondary air is introduced into the exhaust gas via a number of venturi sectors (4) to improve the flow and reduce losses. The venturi sectors may be fitted in the flange, forming a projection (10), which at least partly projects into the exhaust tube.