Fuel-economy and emission-control device for internal combustion engines

An improved fuel-economy and emission-control device for internal combustion engines, of a type having at least one spiral mixer element, and means for mounting said element downstream of a carburetor and upstream of an inlet manifold internally of an coaxial with a passage through which a fuel-air mixture is directed, wherein the mixer element is a spiral element having a given number of turns which gradually decrease in diameter along the fuel-air mixture passage, and means for mounting the spiral mixer element, said means comprising a mounting flange having a tapered central opening which supports the mixer element, the improvement comprising:

• a radial bore coplanar with and passing through the mounting flange so as to communicate with the central opening, through which a fluid supplied by an external intake means may be directed into the central opening and into the inlet manifold,
• wherein the intake means connected to the radial bore comprises, in turn, a solenoid-operated cleaner valve, a solenoid-operated metering valve, and a bypass valve connected to both an air cleaner and a blow-by system for adding vaporized oil to said fluid, said intake means components being connected and in fluid communication via small-bore hoses.