PERFORMANCE EVALUATION OF A FOUR STROKE COMPRESSION IGNITION ENGINE WITH VARIOUS HELICAL THREADED INTAKE MANIFOLDS

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

Performance Characteristics of an Four Stroke Compression Ignition Engine by Arranging Convergent Divergent Nozzle in the Intake Manifold

Growing demands on reduction of Internal Combustion Engine fuel consumption with increase of its performance new designs and optimization of existing ones are introduced. Air motion in CI Engine influences the atomization and distribution of fuel injected in the air charge. Better atomization of Injected fuel allows for a more complete burn and helps to reduce the engine Knock. A four stroke compression ignition engine with power 9 H.P and rated speed 1500 rpm is selected for the present work to investigate the performance characteristics. The swirl motion of the air is an important parameter in optimizing the performance of the engine. In order to increase the air velocity in the inlet manifold a convergent-divergent nozzle is used. The rise in velocity with the use of nozzle generates turbulence at the exit of the manifold which facilitates for better combustion of injected fuel. The Performance characteristics were calculated without nozzle and with out nozzle in the inlet manifold and compared