Cleaning of a DFP

EvacuBake™ is designed to facilitate the cleaning process of dirty filters. In some cases a filter may need to be baked due to high levels of wet soot, unburned hydrocarbons, etc. and must be baked in order to regenerate the soot to ash. The controller is programmed to ramp up the temperature at a rate that will not crack the substrate of the filter and holds the temperature constant for two hours to ensure a complete regeneration of the filter. The controller then automatically decreases temperature at a controlled rate to protect the filter’s substrate.

The EvacuBlast™ equipment was carefully designed to be manually operated for specific reasons such as:

Allows cleaning to be focused on certain areas of the filter. Many filters will not have a consistent color and often times will have dark spots where the soot build up is heavier. Manual operation allows us to focus on the darker areas to ensure the filter is efficiently cleaned.

Has a built in viewing window to show the soot flowing out of the filter. This also allows us the means to determine if there are any problems with the filter such as clogged cells i.e. no visual flow of soot departing the filter when vacuum/air pressure is applied.

Summary: All Diesel Particulate Filters (DPF’s) including on road, off road, and stationary diesel engines, supplied by the factory’s original equipment manufacturers as of 2007, need to be cleaned at regular intervals as small amounts of inert debris, mainly ash and other debris from lubricating oil, engine wear metals, additive and air-induced dust build up in the filter substrate.

To ensure that an optimum level of performance is maintained, the filter must be cleaned. The backpressure monitor will indicate when the filter needs to be cleaned, on average, the filter should be cleaned on a yearly basis. Service also may be required when back pressure exceeds maximum manufacturers recommended limits clearly indicated in all DPF provider service manuals. Premature indicators of potential increased maintenance are: poor fuel economy, reduced power, or slow RPM response.

Historically poor engine performance could be noted by the exhaust i.e. black, blue, or white smoke. With a DPF system installed there is no longer any visible smoke. Some filters may need to be cleaned in shorter intervals depending upon vehicle maintenance and duty cycle.