Abstract:
Initial studies of the effect of air-fuel mixture preparation
on piston engine performance have been conducted on a four cylinder
1600 cc petrol engine using conventional carburation and ultrasonic
fuel atomisation. The performance of the engine, under various
conditions of operation, has been assessed on the basis of specific
fuel consumption and brake mean effective pressure.
Whereas only minor differences in performance were found
under full power condition at part throttle running of the engine
with ultrasonic fuel atomisation improvements in fuel consumption
in excess of 10% were observed. These improvements appear to be
the direct result of better mixture preparation. Indirect benefits
of improved mixture preparation may be a reduction in exhaust
smoke and hydrocarbon emission from the engine.
