ANALISIS CELAH KATUP INTAKE DAN PANJANG INTAKE MANIFOLD TERHADAP PERFORMA MESIN YANMAR L48N6

Abstract

The purpose of this study was to determine engine performance at various rotational speeds through variations in the intake valve clearance and intake manifold length. To do this, researchers conducted experiments by changing the intake valve clearance and the length of the intake manifold. The dependent variable is specific fuel consumption, torque and power, the fixed variables are Dexlite CN 51 fuel and Yanmar L48N engine. Each test on each variable and engine rotation was carried out 3 times. Variations in the length of the manifold used are standard length (4cm), 10cm, 15cm and 20cm. Variations in the valve clearance used are 0.1mm, 0.1mm and 0.2mm. The results of this study showed that the performance of the Yanmar L48N6 with the greatest torque was produced by a 10cm intake manifold with an inlet valve clearance of 0.1 at 2800 rpm of 15.04 Nm. The biggest power is generated by the intake manifold 10cm valve clearance of 0.15mm, namely at 3800 rotation of 5.36 kWh. The smallest specific fuel consumption is produced by an intake manifold of 10cm with a valve clearance of 0.1mm at 3300 rotation of 261.87 g/kWh. It can be concluded that variations in intake manifold length and valve clearance affect the performance of the Yanmar L48N6 engine. The intake manifold length of 10cm produces the lowest BSFC compared to the standard intake manifold and the intake valve clearance setting of 0.1mm produces the lowest BSFC. 

Keywords: Intake Manifold Length, Intake Valve Clearance, Diesel Engine L48N6, KMHE.