Diesel Has Good Combustion Performance
Diesel and petrol are also made from oil. Diesel oil is heated to the temperature 2600c-3500c, from the oil extracted from hydrocarbons, diesel is generally divided into light diesel, Biodiesel heavy diesel and military diesel, vehicles are selected light diesel.
Diesel has five quality requirements: good evaporation and atomization performance, good low-temperature flow performance, good combustion performance, good stability and corrosion resistance and low wear resistance.
1, evaporation and atomization in order to ensure the normal operation of high-speed diesel engine, light diesel oil should have good evaporation, Biodiesel in order to form a homogeneous combustible mixture with the air, the evaporation of diesel oil by distillation and flash point of two indicators to assess. (1) Distillation process: The distillate of diesel oil is within 200~365°c range. (2) Flash point is also called flash fire Point, it is under the prescribed conditions, heating oil from the vapor of the escape of the mixture and flame contact instantaneous flash fire when the minimum temperature, in °c. The flash point of diesel is not only a project to control the evaporation of diesel oil, Biodiesel but also a project to ensure diesel safety.
2. Fluidity of diesel oil is mainly indicated by viscosity, coagulation point and cold filter point (1) viscosity is the important performance index of diesel oil, in the standard viscosity range, we can guarantee the good lubricity of diesel engine fuel system, Biodiesel ensure that diesel has good atomization performance and supply quantity, so that diesel has better combustion performance. (2) The condensate point is the limit temperature of diesel oil storage, transportation and sending and receiving operation, which is the highest temperature that the diesel oil loses its fluidity when the cold starts to solidify under the prescribed conditions. (3) The cold filter point refers to the maximum temperature of a diesel engine which is not able to pass through the filter net. The same kind of diesel oil, Biodiesel cold filter point is higher than the condensate point 4-6°c.
3, combustion of diesel fuel is also called ignition, it indicates the ability of diesel spontaneous combustion. The index of diesel fuel combustion performance is 16 alkane value. Biodiesel The 16 alkane value refers to the volume percent of N-16 alkanes in standard fuels with the same combustion performance as diesel fuel. Diesel oil with a high value of 16 is easy to start, homogeneous and complete combustion, high engine power and low fuel consumption.
4. Stability of diesel oil is the ability of diesel to resist oxidation during storage and transportation. The indexes of evaluating the stability of light diesel oil are mainly expressed by total insoluble matter and 10% residual carbon residue, the greater the value, the less the stability of diesel oil, Biodiesel the more easily oxidized and deteriorated, the color deepened to black, gum increased, the more easily in the engine to generate carbon, the storage and use of diesel oil has a great impact.
5, corrosive property whether light diesel or heavy diesel, can not have a large corrosive, otherwise it will corrode the engine, shorten the service life. Biodiesel The corrosiveness of diesel oil is controlled by three indexes including sulphur content, acidity and corrosion of copper sheet.
The light diesel oil is divided into 20th grades including 10th, 5th, No. 0, 10th,-35th, 50th and-seven. The use of diesel brands must be to ensure that the diesel cold filter point is higher than the operating environment of the minimum temperature principle, according to different regions, Biodiesel temperatures and seasons, the use of different brands of light diesel oil. Low temperature, light diesel oil with lower condensate point, conversely, light diesel oil with higher coagulation point is selected. In general, you can use the following conditions:
10th # Light Diesel--suitable for use in high speed diesel engines with preheating equipment
Light Diesel 5th----------------------10% minimum temperature for use in 8°c areas
Light Diesel No. 0--------suitable for the lowest temperature of 10% in 4°c area
-10th light Diesel oil----------------------10% minimum temperature for -5°c
-20th # Light Diesel--The minimum temperature for a risk rate of 10% is used in areas above -14°c
-35th # Light Diesel--The minimum temperature for a risk rate of 10% is used in areas above -29°c
-50th Light diesel oil--------------------------10%-- -44°c