Toro Groundmaster Series Service Manual page 68

Regeneration (continued)
Engine: General Information
normal engine operation, the pressure differential will increase. The increase
in pressure will signal the engine to begin a process called regeneration.
Regeneration increases the exhaust temperature and the length of time the
engine operates at a higher than normal exhaust temperature, incinerating the
built up soot and turning it into ash. The different types of regeneration used are
listed in order based on the amount of particulate matter in the soot filter (least to
most). The length of time the engine will operate at a higher than normal exhaust
temperature to burn out the soot is also related to the amount of particulate
matter in the soot filter.
Types of regeneration that are performed automatically (while the machine is
operating)
Type
Passive
Assist
Reset
Conditions
Occurs during normal
operation of the machine
at high engine speed or
high engine load
Occurs because of
prolonged operation
at low engine speed, low
engine load, or when the
engine ECU detects the
soot filter is becoming
obstructed.
Occurs every 100 hours
of engine operation
Occurs after an assist
regeneration if the engine
ECU determines the
assist regeneration did
not sufficiently reduce the
soot level
Page 4–6
Description
The DPF processes high heat exhaust
gasses, oxidizing harmful emissions
and incinerating soot to ash.
Passive regeneration occurs as part of
normal engine operation.
The display screen does not display an
icon during passive regeneration.
While operating the machine, run the
engine at full-engine speed and high
load when possible to promote DPF
regeneration.
The engine ECU adjusts the exhaust
intake throttle to raise the exhaust
temperature.
The display screen does not display an
icon during assist regeneration.
The display screen displays
the high exhaust temperature icon.
The engine ECU adjusts the exhaust
intake throttle and the injector timing to
raise the exhaust temperature.
Do not shut off the engine or reduce
the engine speed while the reset
regeneration is processing.
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A