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2.9 Inducement strategy of SCR system
The inducement is the operation aimed at reducing the engine performance due to a malfunction or
tampering with the SCR system detected by the DCU.
The inducement degree is decided by the ECU according to the error detected by the DCU.
The inducement can have the following 2 levels:
•
Level 1: 25% reduction of the MAX available torque.
•
Level 2: 50% reduction of the MAX available torque and 40% reduction of MAX rpm available.
Before activating the inducement (level 1 or level 2) the ECU activates a warning or a warning light on the
car panel (refer to the car documentation for the warning type).
The information on the car panel or the activation of the inducement can occur for the following reasons:
•
®
Low AdBlue
level
•
®
Poor AdBlue
quality
•
Interruption of AdBlue
•
EGR valve malfunctioning
•
Tampering with the monitoring systems of the SCR system.
The inducement strategy is applied according to:
•
detected problem
•
hours passed.
NOTE: Hours are reset after 40h if the DCU does not detect any fault, otherwise the hours are
added to those already counted. For low AdBlue
liquid inside the AdBlue
The strategy for the different faults is listed below:
®
Low AdBlue
level
•
information activation on car panel: <10% of MAX level
•
Level 1 inducement: <2.5% of MAX level
•
Level 2 inducement: 0% of MAX level
®
Poor AdBlue
quality
•
information activation on car panel: upon fault detection
•
Level 1 inducement: after 10h from fault detection
•
Level 2 inducement: after 20h from fault detection
Interruption of AdBlue
•
information activation on car panel: upon fault detection
•
Level 1 inducement: after 10h from fault detection
•
Level 2 inducement: after 20h from fault detection
EGR valve malfunctioning
•
information activation on car panel: upon fault detection
•
Level 1 inducement: after 36h from fault detection
•
Level 2 inducement: after 100h from fault detection
Tampering with the monitoring systems of the SCR system
•
information activation on car panel: upon fault detection
•
Level 1 inducement: after 36h from fault detection
•
Level 2 inducement: after 100h from fault detection
TECHNICAL INFORMATION
®
supply
®
tank, and the fault hours are not counted.
®
supply
®
level, activation depends on the percentage of
2
25
EN
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