Correlation between Camshaft Overlap Degree and Power, Torque and Fuel Consumption on 150 CC Four Stroke One Cylinder Otto Engine

摘要

The performance of a one-cylinder four-stroke engine can be improved by changing camshaft overlap degree. In this paper will be presented the performance of one cylinder four stroke 150 cc otto engine with parameters to be considered are power, torque and fuel consumption on various degrees of camshaft overlap of 17°, 23°, 27° (OEM Value) dan 30°. The test is done on one-cylinder four-stroke 150 cc otto engine. At 27° (OEM Value) condition, maximum power is 13.6 hp @ 9,500 RPM, maximum torque is 11.84 Nm @ 8,000 RPM, and fuel consumption is 30 km/L. Test results show that 30° condition produces maximum power at 14.15 Hp @ 10,000 RPM and it is the largest among the variations of camshaft overlap degree tested. The 23° condition produces maximum torque at 12.15 Nm @ 7.500 RPM and it is the largest among the variations of camshaft overlap degree tested. For fuel consumption, the condition of 17° spent 1 Liter of fuel for 34 km distance.