![]() ![]() In fact, more often than not, the amount of ash in the filter can significantly exceed the amount of soot the DPF was initially designed to trap. ![]() Unlike these idealized cases, the DPF always contains some amount of ash in real-world operation. Despite considerable emphasis and work in understanding and optimizing DPF performance for soot accumulation alone, the reality is quite different. The accumulation of ash in diesel particulate filters is one of the most important factors limiting the filter’s service life and has been described as one of the most important problems facing diesel engine manufacturers. The composition and properties of ash can also be affected by the lubricant chemistry, the exhaust gas conditions and filter regeneration strategy. A number of studies have been conducted and test methods have been developed to investigate the properties and morphology of ash, as well as its impact on DPF flow restriction. ![]() The main sources of ash are engine lube oil additives, as well as fuels and engine wear and corrosion. Abstract: The accumulation of ash in diesel particulate filters is an important factor limiting the filter’s service life, increasing its pressure drop and having an adverse effect on fuel economy. ![]()
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