International Journal of Applied Research in Mechanical Engineering


Fuel economy remains the prime factor favoring the application of the diesel engines and the need to improve performance regarding power output or lower fuel consumption or preferably both, has led to research in the engine systems. This research includes design and orientation of the inlet manifold, which is a major factor effecting the performance of the engine.A four stroke air cooled compression ignition engine with power 9 H.P and rated speed 1500 rpm was selected to investigate the performance characteristics. The swirl motion of the air is an important parameter in optimizing the performance of an engine. For better turbulence the surface of the inlet manifolds (C.I Engine) will be made rough and unpolished. Here, for obtaining better turbulence the helical threads were arranged in the inlet manifolds. The performance test was performed on the engine with the normal manifold and helical threaded manifolds of pitch 10mm, 15mm, 20mm, and 25mm. The performance characteristics with normal manifold and helical threaded manifolds were calculated and compared.





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