Cylinder deactivation technique in multi-cylinder engines for fuel consumption reduction

Abstract Cylinder deactivation is well-known in spark-ignited (SI) engines and compression-ignited (CI) engines. The major reason why the efficiency of these decreased at part load due to flow restriction intake system caused by partially closing throttle valves, which causes increased pumping losses. In order resolve this issue, cylinder can be implemented SI with four cylinders developing a suitable control system. Half engine's had their fuel injectors valve trains turned off, enabling (CDA). Fuel consumption was reduced reducing engine impelling work decreasing heat transmission walls cylinder. CDA techniques are tested for impact on in-cylinder pressure loss. This reveals that all solutions minimize losses thereby enhancing thermal efficiency. These findings suggest both exhaust valves most effective way triggering CDA, lowering BSFC (Brake-specific consumption).