TY - JFULL AU - Osama H. Ghazal and Isam H. Qasem and M.Riyad H. Abdelkader PY - 2012/10/ TI - Modeling the Effect of Inlet Manifold Pipes Bending Angle on SI Engine Performance T2 - International Journal of Mechanical and Mechatronics Engineering SP - 1834 EP - 1838 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/14118 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 69, 2012 N2 - the intension in this work is to investigate the effect of different bending manifold pipes on engine performance for different engine speed. Power, Torque, and BSFC were calculated and presented to show the effect of varying bending pipes angles on them for all cases considered. A special program used to carry out the calculations. A simulation model for 4-cylinders spark ignition engine with turbocharger has been built and calculated. The analysis of the results shows that for 120o angle the torque increases about 40% at 3000 rpm and 25% at 4000 rpm without changing in fuel consumption. For 90o angle the increment in torque is about 10 %. For the same bending angle the increment in brake power is around 40% at 3000 rpm and 25% at 4000 rpm. The increment in fuel consumption is about 12% for 60o and 30% for 90o between (6000- 7000) rpm. ER -