A novel experimental test rig for simulating of the fuel injection system components behavior under cold conditions

In recent years diesel direct injection engines have been received more attention due to their high fuel efficiency and torque characteristics compared with gasoline engines. However, the cold start difficulties and cold diesel fuel behavior are still important issues which need improvement. In this study, a novel experimental facility has been developed using Stirling engine for fuel cooling and estimating the gel point and CFPP of diesel fuel and evaluating of the very cold diesel fuel behavior inside high-pressure common rail diesel fuel injection system. The results showed that the diesel fuel that is produced inside Iran has the capability to flow inside fuel injection system at temperature of -250C without using anti-freeze. The results also provided a good understanding of cold diesel fuel behavior and the test rig can be used for evaluating the fuel injection system components under ultra-cold conditions.