Electronic Fuel Injection systems are very important components in today’s automotive industry. Its use on modern engines allows manufactures to develop new engine designs while increasing engine efficiency and lowering fuel consumption and exhaust gas emissions. EFI systems also increased engine reliability by providing a smooth start and run under most weather conditions. This paper presents the state-of-the-art of direct fuel injection in spark-ignition (SI) engines, the current technology to make possible its accomplishment, the characteristics of the engines using this system and a comparative experimental study between this system
