Diesel Particulate Filter Diesel Particulate Filters (DPF) And How They Work If you follow an old diesel vehicle that's accelerating away, you know what’ll happen – a small black cloud of soot will puff out of the exhaust. That'll soon be a thing of the past though because, thanks to their new DPF technology, modern diesel vehicles are cleaner than ever before. What is a Diesel Particulate Filter? The DPF is a filtration system, located within the exhaust system, which filters out harmful soot particles from the exhaust gases. The maintenance-free filter normally consists of a silicon carbide core, perforated by microscopic channels. The exhaust gas passes through the channel walls, on which the particulates collect. Does the DPF need changing regularly, like an air filter? No, the DPF is entirely self-cleaning, a process which is controlled by the engine management system and pressure and temperature sensors which detect when the filter must be cleaned. The exhaust temperature is then increased by deliberate multiple fuel injections into the engine, raising the temperature of the DPF to 600°C, which burns the soot particles without leaving any residue. The regeneration process takes place periodically, under normal driving conditions, without the driver noticing that it’s in progress. Vehicles that spend much of their time on short trips or in urban environments may require a longer journey at higher speeds to complete the regeneration cycle – in these instances a dashboard reminder light will inform the driver when this is required. If the driver ignores the warning light and waits too long to operate the vehicle at a higher speed over a longer distance, the DPF may not regenerate properly. If this continues it can damage the DPF completely, meaning it will need to be replaced at an authorised garage.
SOLUTION Cleaning the particulate filter instead of replacing: Efficient & fast. PROBLEM The electronic indicator lights, the vehicle has no more power and an extremely high fuel consumption? The diesel particulate filter has only a limited capacity to store particulates. From a certain amount of soot, the soot particles must be burned in a regeneration process to CO2 and ashes. Different reasons can mean the regeneration process does not start and in consequence the DPF gets clogged with soot particles. Possible causes: Defective or not fully functioning injectors Sooty or coked EGR valve Different qualities of fuel or Bio fuels Short distance driving profile SOLUTION: TUNAP is the first manufacturer to have developed a patented particulate filter cleaning system with which clogged particulate filters can be cleaned in an installed condition, rapidly, simply and significantly more economically than replacing them. Used when regeneration is no longer possible Cleaning to almost new condition possible No expensive new installation Cleaning without disassembly of the particulate filter Non-flammable Neutral ash and metal-free formulation Evaporates completely Compatible with other materials An overloaded DPF: That is expensive. For replacement of the part customers have to pay a lot of money. For a new diesel particulate filter between £600 and £4000 would be charged. In addition a prolonged stay in the workshop and a rental car has to be organised. TUNAP Solution: Cleaning instead of replacing Optimal customer service DPF functional again in the shortest possible time DPF cleaning without expensive new installation Technical approvals from leading car manufacturers Huge cost savings Preventive measure to keep your customers permanently mobile Already more than 100,000 times successfully applied.
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