Development of An Electronic Controlled Fuel Injection System Which İs Compatible with Different Alternative Fuels in Order to Use a Spark Ignition Engine Test

Volkan Çavuş


In this study, a port type fuel injection system compatible with alternative fuels has been developed. The system is adapted for gasoline, ethanol and isobutanol fuels. Moreover, the system is programmed to provide the use of these fuels at the desired air excess coefficient (AEC). This system, which is prepared for experimental purposes, can be adjusted in accordance with all kinds of fuel and engine features with minor changes. For this purpose, the carburetor fuel system of a single cylinder, spark ignition and air-cooled engine with a displacement of 390 cc was converted to a port-type injection fuel system. For this, an electronic control unit has been developed and some sensors and auxiliary apparatus have been added to the engine. In addition, it is designed in such a way that the desired AEC value in the engine can be adjusted during the experiments. The installed system has been tested with gasoline, ethanol and isobutanol and has been found to work successfully. It was observed that the system was delayed in responding only to sudden loads and some problems occurred partially. Due to the absence of an exhaust emission device, only gasoline fueled results are given due to the possibility of disrupting the calibration of the exhaust emission tests performed with a device supplied by a private company. Hydrocarbon (HC), carbon monoxide (CO) and carbon dioxide (CO2) emission results of the engine were obtained in the experiments performed at 1500 rpm and 3000 rpm without load.


Spark ignition engine; fuel injection system; ethanol; isobutanol; excess air coefficient; exhaust emission

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