![]() ![]() If this does happen, it’s best to consult your insurance company for advice before undertaking any repairs. The fluid will need to be drained and disposed of correctly, and any contaminated components will need flushing out or may even need replacement to avoid long term corrosion issues. To minimise contact damage, never start the engine or, better still, don’t turn the ignition on to the start position, as this will only send the fluid through the pumps toward the engine and the potential for serious damage is accelerated. The separate filler nozzle is usually coloured blue and designed to have a smaller filler tube as to not confuse it with the diesel fuel filler nozzle at filling stations.ĭue to the corrosive properties on steel, it is a very big deal if exhaust fluid is ever put into a fuel tank (petrol or diesel) by mistake. These can be washed away with water.ĭEF must only be poured into the vehicle’s separate tank, and must not be put into the fuel tank and is not to be mixed with any additives or diluted with water. If you leave it to dry it will turn into white crystals. If you spill a small amount of DEF, it can be washed away with water or wiped up. The fluid is, however, corrosive for some metals such as carbon steel, aluminium, copper and zinc. This is how modern diesel engines are able to meet the latest worldwide emission standards (Euro 5 & 6, EPA10, JLT05, etc.).ĭEF is not toxic, harmful or dangerous, but needs to be stored and used correctly. This fluid is stored in a separate container and is sprayed into the exhaust stream of diesel vehicles to cause a chemical reaction that, again, breaks down dangerous NOx emissions into nitrogen and water. ![]() Nowadays, urea is used as the reducing agent.ĭiesel engines with SCR systems fitted use a special Diesel Exhaust Fluid (DEF), known by terms such as Z DEC, AlliedBLue, GoClear, or AdBLue, which is a non-toxic solution of 32.5 per cent urea in deionized water. This was originally only found on large ships, gas turbines, and is now used in automobiles. Development continued in Japan and the US in the early sixties, with research focusing on less expensive and more durable catalyst agents. SCR systems were first patented in 1957 by Engelhard Corporation using ammonia as the reducing agent. This means that it deals with emissions (often without the need for exhaust gas recirculation), and has allowed manufacturers to tune their engines to improve efficiency and increase the amount of torque. ![]() SCR is an after treatment technology, where fluid is sprayed into the exhaust stream of diesel vehicles to cause a chemical reaction that breaks down environmentally dangerous NOx emissions into harmless nitrogen and water. SCR systems can currently be found on some Mercedes-Benz BlueTEC models, as well as diesel vehicles from Volkswagen, Peugeot and Citroen. The majority of light and heavy-duty diesel vehicle manufacturers have found that the only way to meet these rules without compromising engine performance and fuel efficiency is through Selective Catalytic Reduction (SCR). We’ve put together a guide to help you with some of the jargon surrounding DEF.ĭue to the Environmental Protection Agency (EPA), rules for diesel vehicles are some of the most stringent emission standards in the world. We are likely to see the bulk of these vehicles arriving from European countries due to the strict emissions regulations already in place there. With vehicle emissions very much in the New Zealand spotlight currently, there’s likely to be more diesel vehicles arriving using Diesel Exhaust Fluids (DEFs), which is a liquid used to reduce the amount of air pollution created by a diesel engine. Smart Charge – Intelligent Battery Charger. ![]()
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