F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/108
F02M 31/08 (2006.01)
Patent
CA 1047860
FUEL INDUCTION SYSTEM ABSTRACT OF THE DISCLOSURE This invention relates to an improvement in the induction system of an internal combustion engine. More particularly, the invention comprises an improved com- bination with or addition to an induction system wherein the primary barrel of a carburetor releases a fuel-air mixture to an intermediate conditioning chamber, which in turn is connected to deliver the conditioned fuel-air mixture to the usual intake passage or manifold. Of recent years there has been a trend toward operating spark-ignited internal combustion engines at leaner air/fuel ratios in order to decrease the amount of hydrocarbon and carbon monoxide in the exhaust. One limiting factor in going towards leaner operation is gasoline maldistribution from cylinder-to-cylinder. The induced air/fuel ratio must be kept lean enough such that the cylinder supplied with the leanest mixture will still fire, otherwise exhaust hydrocarbon and carbon monoxide emission will increase rather than decrease. In our earlier Canadian applications Serial No. 218,950 and Serial No. 218,951, we have described fuel in- duction systems for and in combination with multicylinder engines in which fuel maldistribution is substantially lowered. In said system a container is provided in the exhaust gas flow path. The carburetor barrel, or venturi, delivers an air/fuel mixture directly into this container in which it is heated and subjected to great turbulence forming a uniform air/fuel mixture. This uniform air/ fuel mixture is then conducted into the intake manifold and thence into the individual cylinders. - 2 -
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