A diesel engine can work hard for a variety of reasons. This causes vibration. There may be a clatter, ringing, knocking. Also a diesel engine can smoke white and black (soot). The main reasons are early ignition, poor atomization of the nozzles, as well as jamming of the sprayer needle (needle freezing). The quality of diesel fuel is also important. In addition to impurities, low-quality diesel fuel has a low cetane number. The cetane number greatly affects the quality of combustion and ignition of diesel fuel. When the cetane number 55 diesel fuel very quickly lights up and burns correctly. If the cetane number is less than 41-45, then a certain time elapses after the injection (more than necessary for proper combustion) and only then the diesel fuel ignites, but already in the form of an explosion. Because of this, the diesel rings. Especially in the cold, when both diesel fuel and the engine have a low temperature and it is just this parasitic time appears. Hot diesel fuel ignites faster, but its temperature is limited by the comfortable operation of fuel equipment. As nozzles are cooled by the same diesel fuel. In winter, a diesel engine with a higher cetane number of diesel fuel will start up faster and smoke less.
31 мар 2020
