The upliftment of hybrid vehicles leading to a cleaner environment and better fuel economy is not possible without the applicability of the Atkinson cycle in vehicle engines. The Atkinson cycle's viability for usage in hybrid cars is demonstrated through time-dependent thermodynamics. This cycle engine accomplishes full combustion at constant volume and has an enhanced grade of ignition. These insights can be utilized to create new Atkinson cycle engines as guides. With the help of research articles, researchers investigate the performance of the Atkinson cycle to identify what changes in parameters maximize the Atkinson cycle's operation..