Mostafa Khajezade Roodi - Department of Mechanical Engineering, Payame Noor University (PNU), Tehran, P.O.BOX, ۱۹۳۹۵,۳۶۹۷, Iran
Ali Jalali - Department of Mechanical Engineering, Payame Noor University (PNU), Tehran, P.O.BOX, ۱۹۳۹۵,۳۶۹۷, Iran
Ali Hedayati - Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad‎
Amin Amiri Delouei - Department of Mechanical Engineering, University of Bojnord, Bojnord ۹۴۵ ۳۱۵۵۱۱۱, Iran

In this study, the effect of different intake manifold geometries on the performance of a spark-ignited engine is investigated both numerically and experimentally. ۱D and ۱D-۳D simulations are carried out to find the optimal dimensions of different intake manifold designs. The numerical simulations are successfully validated with real data. The results show that the manifold design utilizing two-valve throttle has a better performance. The superior design is constructed and mounted on the engine to compare the output result with the base design. The operation tests are performed at various rotational speeds in the range of ۱۰۰۰-۶۰۰۰ rpm. Regarding the experimental tests, the superior double intake manifold increases the engine brake power and torque by ۶.۸۱۴%. 

Double intake manifold, ۱D-۳D numerical simulation, Experimental test, Optimization, SI engine