Kubota WSM L3560, Workshop Manual

Page: 144 / 801

ENGINE
L3560, L4060, L4760, L5060, L5460, L6060, WSM
1-M29
Diesel Oxidation Catalyst (DOC)
An oxidizing catalyst set in front of the Diesel
Particulate Filter (DPF) step that uses post injection
unburned fuel to actively regenerate the DPF.
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Diesel Particulate Filter (DPF)
The Diesel Particulate Filter (DPF) is a device that
captures and combusts PM in the exhaust gas.
Physically captures the PM using a filter which
spontaneously combusts when exhaust gas temperature
is high.
However, while exhaust gas temperature is low PM
does not spontaneously combust the pressure
differential between the inlet and outlet of the DPF is
detected and the PM is combusted using a heat source
generated using DOC to regenerate the filter.
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Function of Diesel Particulate Filter (DPF)
The Diesel Particulate Filter (DPF) is a filter to
capture fine particles (soot and ash) contained in the
exhaust gas of a diesel engine.
The ash content is mainly metallic additives
contained in burnt lubricating oil.
The filter has a honeycomb structure with adjacent
cell holes alternately closed.
In addition, by alternately closing the inlet side and
the outlet side of the exhaust gas, the thin ceramics wall
is used as a filter.
As shown in the figure, fine particles in the exhaust
gas are captured when they pass through this thin wall,
and the exhaust gas is discharged as clean gas.
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(1) Diesel Oxidation Catalyst
(DOC)
(1) Diesel Particulate Filter
(DPF))
KiSC issued 03, 2016 A