EFFECTING FUEL ECONOMY BY INDUCTION AIR IN PETROL ENGINES.

This paper describes a method to effect fuel economy in spark ignition automobile engines under part-load conditions. It has been observed that most of the time automobiles ply at part-load conditions, especially within the city limits, and seldom run at their rated load and speed. The efficiency of the engine under such conditions is low. The ability of conventional carburetors to vary the air-fuel ratio to suit all conditions of load and speed is limited. This can be improved by induction of air which also results in reduction of objectionable exhaust emission and increases thermal efficiency by 2 to 6%.