The Effect of Gasoline Volatility and Ambient Temperature on Hot Fuel Handling

Hot fuel handling is becoming a more important factor for passenger car driveability because of the trends toward increased gasoline volatility and higher fuel temperature in the engine comportment. However, passenger car development work is very short term and vehicles under development are used under a variety of conditions, employ several types of fuel supply systems and exhibit different fuel supply pressures. Therefore, it is necessary to find a index that can expect the hot fuel handling performance for use in passenger car development work. This report describes the results of tests carried out to find a new index called the fuel handling index. These tests were performed under using passenger cars with different types of fuel supply systems and pressures, different temperatures, using gasolines of different volatility and under different driving conditions.