Abstract:
This paper investigates the effects on engine performance by using different camshaft profile and ethanol gasoline blend on SI engine. A four stroke, small SI engine (Honda EX 5) was used for conducting this study. All output parameters were taken for torque, specific fuel consumption, and brake thermal efficiency, using unleaded gasoline (RON97)-ethanol blends with different percentage of ethanol wide-open throttle (WOT) opening position and variable engine speed ranging from 2000 to 8000 rpm. The results showed that blending unleaded gasoline with ethanol decrease the torque, specific fuel consumption, and brake thermal efficiency. The 10% volume of ethanol and standard camshaft profile gave the best result for all measured parameters at all engine speed.
