The particulate filter is a system introduced since 2000 to reduce pollution from diesel engines, particularly the component of PM10. The patent belongs to the PSA group (Citroen and Peugeot). This type of engine emits more particulates than gasoline engines, especially in the case of six older engines (especially euro1). Of course, it also said that gasoline engines emit infinitely higher values \u200b\u200bwith respect to other toxic substances (phenols), but this is not the topic of this post.
emissions are filtered with appropriate filters, which are internally filled with microscopic channels where trapping occurs PM10: it is periodically burned automatically when the car reaches a certain speed for a certain number of miles . To allow the diesel combustion must be added the ' oxide cerium (also called glycerine ) that allows you to be burning the lower temperatures. The glycerine is stored in a separate tank, which must be replenished periodically - every 80,000 miles.
When the controller detects that the filter is clogged, an indicator is lit and the driver must keep a certain speed for a certain period of time, to allow the achievement of an appropriate temperature (450 ° C) and the completion of regeneration cycle.
There are filters that work without glycerine, stainless steel, but to work they require higher temperatures (800 ° C).
speeds be achieved are between 60 and 90 km / h: If you are unable to maintain a constant speed the process is repeated.
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