Effect of a novel mechanical CVVL system on economic performance of a turbocharged spark-ignition engine fuelled with gasoline and ethanol blend

In order to improve the fuel economic performance of the gasoline engine, a novel mechanical continuously variable valve lift (CVVL) system with self-regulation of the valve timing (CVVLT) is proposed. The bench tests are conducted on the original and prototype engines with the ethanol blend fuel. Then, a simulation model is developed to evaluate the benefits of the proposed CVVLT system. Moreover, theoretical analysis of intake pumping losses...