Manifold system

摘要

Herein disclosed is a manifold system for an internal combustion engine of the type having an auxiliary combustion chamber associated with each main combustion chamber and connected by a torch passage. The manifold system includes a main intake manifold for distributing a lean air-fuel mixture to all of main combustion chambers of the engine, an auxiliary intake manifold for distributing a rich air-fuel mixture to all of auxiliary combustion chambers of the engine; and a cooling liquid passage extending in contact with the main and auxiliary intake manifolds to heat the lean and rich air-fuel mixtures.