Influence of cylinder deactivation technology on fuel consumption and emissions of four-cylinder spark ignition engine

Cylinder deactivation is one of recent technologies that reduce the fuel consumption and exhaust emissions. This technology deactivates some cylinders; when there is no need to their output torque. Increased fuel efficiency، decreased emissions from deactivated cylinders and better breathing capacity are results of deactivation. In this paper، a four-cylinder spark ignition (SI) engine has been chosen as a case study. First، all parts of the engine were modeled in the GT-POWER software and then، the model was validated. The second part of this study includes deactivating of cylinders. Results showed advantages in the fuel efficiency and exhaust emissions.