en موتور احتراق داخلی Internal Combustion Engines (ICE, ...) پژوهشي Research Nowadays, automakers have invested in new technologies in order to improve the efficiency of their products. Giant automakers have taken an important step toward achieving this objective by designing continuously variable transmission systems (CVT) to continuously adapt the power of the engine with the external load according to the optimum efficiency curve of engine and reducing fuel consumption beside, making smooth start up and removing the shock caused by changing the gear ratio and making more pleasurable driving. Considering the specifications of one of Iranian automaker products (the Saipa Pride 131), a CVT with a metal pushing belt and variable pulleys have been designed to replace its current manual transmission system. The necessary parts and components for the CVT have been determined and considering the necessary constraints, its mechanism and components have been designed. CVT, metal belt, pulley, Pride with CVT, design 699 717 http://ase.iust.ac.ir/browse.php?a_code=A-10-63-72&slc_lang=en&sid=1 E. Maleki Pour 180031947532846001061 180031947532846001061 Yes S. Golabi 180031947532846001062 180031947532846001062 No