Intake and exhaust manifold device of an internal combustion engine

Claim 1

An inlet and exhaust manifold device for an internal combustion engine of the type having an auxiliary combustion chamber associated with each main combustion chamber and connected by a torch nozzle, the improvement comprising, in combination: a main intake manifold in communication with the main combustion chamber, an auxiliary intake manifold in communication with the auxiliary combustion chamber, an exhaust manifold in communication with the main combustion chamber, a riser laterally spaced from the engine, a first carburetor supported by the riser for supplying a lean mixture to the main intake manifold, a second carburetor supported by the riser for supplying a rich mixture to the auxiliary intake manifold, means on the riser for placing the main intake manifold in thermal communication with the cooling system of the engine for heating the lean mixture to a minor extent, and a means for placing the auxiliary intake manifold in thermal communication with the exhaust manifold along the length thereof for heating the rich mixture to a greater extent.