Engine manifold with air gap insulator carburetor mounting

Abstract From the Canadian patent

Abstract of the Disclosure --, The intake manifold of an internal combustion engine has incorporated therein a bottom mixture plenum in heat transfer relationship for heating thereof by exhaust gases discharged from the engine. The plenum receives the induction mixture for the engine through at least one inlet bore in the form of a tube perforated through its side wall to distribute air and crankcase ventilation fumes from an air chamber located directly under the carburetor pad of the intake manifold and to distribute recirculated exhaust gases from a second chamber positioned between the plenum and the air chamber the second, chamber being supplied with exhaust gases for recirculation the …