The present invention is directed to a filter cleaning device, in particular,
diesel particulate filters. In one embodiment, the device comprises a source of
high pressure fluid and means to transport the fluid to a nozzle or nozzles; an
actuator for moving the nozzles; a controller with logic for instructing the actuator
to automatically move the nozzle or nozzles across the surface of the filter; a
collection device and suction device downstream of the filter; and ducting to transport
the fluid between parts of the system. In one embodiment, a second collection device
is used downstream of the suction device to provide additional particulate removal.
There are three methods proposed for providing high pressure cleaning fluid to
the filter face: 1) rotating the filter and rotating the jet about an axis outside
of the filter; 2) moving a nozzle in two perpendicular directions (i.e., x-y);
and 3) rotating a rectangular nozzle about the central axis of the filter.