إنشاء الموديل الرياضي لتصميم بروفيل حدبات أعمدة الحدبات من النوع من دون الضرب على قاعدة الصمام لمحركات الديزل

The camshaft is considered as the most sensitive aspect of the diesel engine, because the difficulty of cam lubrication increases its wearing percentage. The most important parameters of the camshaft are the diagram of the valve rising, the suction strokes and the time-section valves. These parameters will, directly and sharply, affect the suction strokes, fresh charge, heat exchange as well as the economic, environmental and power parameters of the engine. The mathematical model proposed in this research facilitates designing a camshaft profile without knocking on the valve base. The referred to profile will be less prone to wear down. Thus, its investment duration will be longer, compared to normal profiles. The profile reliability has been proved through the impalare velocity and acceleration diagrams, in the hope of improving the engine's quality and efficiency.