Sices HS 315, Техническое руководство

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Technical Handbook 101
o
SCR:
▪ spn 4331: “SCR Actual Dosing Reagent Quantity (instantaneous)”.
▪ spn 4334: “SCR Dosing Reagent Absolute Pressure”.
▪ spn 4360: “SCR Intake Gas Temperature”.
▪
spn 4363: “SCR Outlet Gas Temperature”.
o
DEF:
▪ spn 1761: “DEF Tank Level”.
▪
s
pn 3031: “DEF Tank Temperature”.
▪
spn 3
515: “DEF Temperature 2”.
▪ spn 3516: “DEF Concentration”.
▪ spn 5963: “Total DEF Used”.
o
EST:
▪ spn 3241: “Aftertreatment 1 Exhaust Gas Temperature 1”.
The same measurements are available as internal measurements AM_153, AM_154,
AM_155, AM_156, AM_157, AM_158, AM_159 e AM_180.
Furthermore, the specification requires the display of some icons. The controller
supports them:
o
Indicates that the regeneration of the DPF is inhibited following
explicit command. It is usually displayed in solid yellow (it is a state, not an
anomaly). If, however the condition remains for a long time and the soot level
in the filter becomes extremely high, the ECU activates a diagnostic code with
red lamp (icon with a STOP sign shape) and stops the engine: in this case the
icon becomes red (fixed or flashing, like red lamp).
o
Indicates that regeneration of the DPF is required. It is yellow. It is
fixed (not blinking) if the quantity of particulate in the filter is above the
"regeneration request" threshold but below the warning threshold. It becomes
flashing if it is above the warning threshold.
o
It signals a high temperature (real or possible) in the emissions
management system (HEST
– High Emission System Temperature), probably
because regeneration is in progress or about to start: the ECU could apply a
reduction in engine performance (derating). It is yellow, not flashing.
o
Indicates a low level of the Diesel Exhaust Fluid (DEF) tank. It could
be:
▪
Fixed yellow: level below normal.
▪
Flashing yellow: level below normal, derating in progress.
o
Indicates that the engine emissions system has a malfunction or is
working outside the standard operating conditions. It is yellow, it can be fixed
or flashing.
Note : The controller forces the display of this page every time an icon is activated.
•
Commands. The specification provides two separate commands, to be sent to the
ECU, to influence the regeneration of the DPF:
o
Inhibition of regeneration. This command should only be activated when the
full power of the generator is required. Regeneration, in fact, involves
temperature increases that may require a derating of engine performance. It