12 types of commercially available diesel detergents are chosen for detergency evaluation by a simulation bench test. Some metal components they contain are analyzed with atomic emission spectrometry. There are also some impacts of these detergents on the power, fuel consumption and soot emissions of diesel engines as investigated profoundly here. Test results show that various types of detergent products in the market take on greatly different performances; the mass of deposits formed on the parts decreases and then increases as more detergent is added; the ash-based detergent can effectively reduce the soot emissions of the engine; the addition of the detergent has no significant impact on the engine power and economy.
