- Also known as "AUS 32" in Europe, "DEF" or "Urea Solution" in the USA, it is registered with the “AdBlue®” brand at the Verband der Automobilindustrie (VDA), and must comply with the following ISO standards:
- ISO 22241-1 Quality requirements
- ISO 22241-2 Test Methods
- ISO 22241-3 Handling, transportation and Storing
- ISO 22241-4 Refilling Interface
- The DEF tank must be filled by means of the specific automatic filling nozzle at the authorised distributors, refer to the car manual for refilling operations.
- Upon refilling, comply with the MAX level indicated on the tank.
- During the refilling operations prevent any impurity from entering the tank.
- At tank inlet there is a filter that must be periodically cleaned or replaced (see maintenance and replacement table - for tank supplied by Kohler only).
- DEF quality must comply with the specifications described in Table 2.5.
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Warning
- Do not mix DEF with fuel or other liquids (including water) and do not fill the fuel tank with DEF.
- The presence of DEF inside the specific tank is required to start the engine.
- Purchase in containers: the container, even if opened, can be stocked with the same conditions of a sealed container.
- Do not stock the container with a temperature higher than 35°C as this could alter the DEF.
- In case of DEF freezing inside the container (< -11,5 °C | 11,3 °F), DEF can be used when it returns to its liquid state.
- Do not expose DEF to direct sunlight.
- In case of opening and closing of the original purchase container, DEF must be checked through a spectrometer to check its quality before use.
- Do not insert altered DEF in the tank as the engine could not respect the emission parameters, generate DCU errors and as a consequence turn off or fail to start the engine.
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2.5
| PARAMETERS |
UNIT OF MEASUREMENT |
VALUE |
| Title |
Weight % |
31,8 ÷ 33,2 |
| Density at 20°C |
kg/m3 |
1.087 ÷ 1.093 |
| Refraction index at 20°C |
°C |
1,3814 ÷ 1,3843 |
| Alkalinity like NH3 |
Weight % |
< 0,2 |
| Biuret |
Weight % |
< 0,3 |
| Aldehyde |
mg/kg |
< 5 |
| Insoluble |
mg/kg |
< 20 |
| Phosphates like PO4 |
mg/kg |
< 0,5 |
| Calcium |
mg/kg |
< 0,5 |
| Iron |
mg/kg |
< 0,5 |
| Copper |
mg/kg |
< 0,2 |
| Zinc |
mg/kg |
< 0,2 |
| Chrome |
mg/kg |
< 0,2 |
| Nickel |
mg/kg |
< 0,2 |
| Aluminium |
mg/kg |
< 0,5 |
| Magnesium |
mg/kg |
< 0,5 |
| Sodium |
mg/kg |
< 0,5 |
| Potassium |
mg/kg |
< 0,5 |
| Freezing point |
°C |
-11
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