Means for increasing fuel efficiency in internal combustion engines

Claim 1

IN AN INTERNAL COMBUSTION ENGINE HAVING AN INTAKE MANIFOLD INCLUDING A HOUSING ENCLOSING AN UPRIGHT CYLINDRICAL CHAMBER OPEN AT THE TOP UPON WHICH IS MOUNTED A CARBURETOR TO DISCHARGE FUEL MIXTURE INTO THE CHAMBER AND BELOW WHICH IS MOUNTED AN EXHAUST MANIFOLD HOUSING TO HEAT THE CHAMBER, THE INTAKE MANIFOLD FURTHER INCLUDING CONDUITS LEADING FROM SAID CHAMBER TO THE ENGINE CYLINDERS, THE IMPROVEMENT CONSISTING IN ADJUSTABLE MEANS FOR MODIFYING THE HEATING EFFECT OF EXHAUST GASES IN THE EXHAUST MANIFOLD HOUSING UPON THE FUEL MIXTURE DISCHARGED FROM THE CARBURETOR CONSISTING IN THE PROVISION OF A HIGH HEAT CONDUCTING METALLIC INSERT IN SAID CHAMBER AND OF ADJUSTABLE MEANS FOR VARYING THE FLOW OF EXHAUST GASES UNDER SAID CHAMBER IN SAID EXHAUST MANIFOLD HOUSING IN A RANGE BETWEEN COMPLETE FLOW OF THE GASES AGAINST THE BOTTOM OF THE CHAMBER AND COMPLETE DIVERSION OF THE GASES AWAY FROM THE BOTTOM OF THE CHAMBER, AND HIGH HEAT CONDUCTING MEMBERS MOUNTED IN SAID CONDUITS AT THE JUNCTIONS OF THE CONDUITS WITH THE ENGINE CYLINDERS.