About: Diesel exhaust fluid   Sponge Permalink

An Entity of Type : owl:Thing, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

SCR systems are sensitive to potential chemical impurities in the urea solution, therefore the solvent is demineralised water. The solution is clear, non-toxic and safe to handle. However, it can corrode some metals and so must be stored and transported in vessels made of materials not so affected. DEF is stored in a tank onboard the vehicle, and injected into the exhaust stream by a metering system at a rate of 3–5% of diesel consumption volume. This low dosing rate ensures long fluid refill intervals . An Electronic control unit adjusts the addition of fluid in accord with such parameters as engine operating temperature and speed to ensure that the emmisions levels are with permitted limits.

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  • Diesel exhaust fluid
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  • SCR systems are sensitive to potential chemical impurities in the urea solution, therefore the solvent is demineralised water. The solution is clear, non-toxic and safe to handle. However, it can corrode some metals and so must be stored and transported in vessels made of materials not so affected. DEF is stored in a tank onboard the vehicle, and injected into the exhaust stream by a metering system at a rate of 3–5% of diesel consumption volume. This low dosing rate ensures long fluid refill intervals . An Electronic control unit adjusts the addition of fluid in accord with such parameters as engine operating temperature and speed to ensure that the emmisions levels are with permitted limits.
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dbkwik:tractors/pr...iPageUsesTemplate
abstract
  • SCR systems are sensitive to potential chemical impurities in the urea solution, therefore the solvent is demineralised water. The solution is clear, non-toxic and safe to handle. However, it can corrode some metals and so must be stored and transported in vessels made of materials not so affected. DEF is stored in a tank onboard the vehicle, and injected into the exhaust stream by a metering system at a rate of 3–5% of diesel consumption volume. This low dosing rate ensures long fluid refill intervals . An Electronic control unit adjusts the addition of fluid in accord with such parameters as engine operating temperature and speed to ensure that the emmisions levels are with permitted limits. These systems are required on trucks, modern high power tractors and construction plant under the Tier 4 emissions standard that were introduced in 2011 ? in most major countries. From 2012 smaller delivery vehicles will also have to meet this standard in some areas (i.e. within the "London Low Emission Zone").
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