Iveco EUROCARGO, Instructions Manual

Page: 156 / 226

22
EUROCARGO Euro 6
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POWER TAKE-OFFS
POWER TAKE-OFFS
4.7
STANDARD CONFIGURATIONS
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Printed 603.95.747
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1st Ed. - Base 12/2013
Accelerator pedal enabled/disabled
In normal driving mode (PTO mode 0), the accelerator pedal is always enabled. In PTO modes 1, 2 and 3, the accelerator pedal
may be disabled. In this mode, the PTO speed regulator function of the engine ignores the accelerator pedal. If the accelerator
pedal is active in these modes, the engine speed may be increased using the pedal up to the maximum N
max
rpm value in effect.
Allison gearbox
With the Allison transmission, engagement of the PTO is coordinated by the transmission control unit and the Expansion Module
ECU, and consists of the following stages:
●
request for engaging PTO (the transmission control unit verifies that the internal conditions necessary for performing the
operation safely are met: engine speed <900 rpm and transmission output speed <250 rpm);
●
solenoid valve activated by ECU to engage PTO;
●
if the PTO and parking brake are engaged simultaneously, the transmission is automatically shifted into neutral and PTO mode
2 is activated (the relay on the relay carrier board of the transmission control unit on the rear cab bulkhead is powered);
●
verification of safe PTO operating conditions (transmission output speed <300 rpm).
The button for engaging the PTO is situated on the centre of the dashboard.
Note Before activating the PTO, the transmission control unit verifies a number of different parameters (engine speed <900
rpm and transmission output speed <250 rpm). If all the internal transmission conditions required are met, the Allison
transmission control unit automatically engages the PTO. Any limitations applicable for the active PTO mode (final speed,
maximum torque etc.) are also valid during the entire engagement process.
Certain parameters may be modified by the Allison Customer Service to meet the requisites of the bodybuilder.
Usage of PTO with vehicle in motion
If no limitations are required (e.g. torque limiting, max. rpm etc.) while a PTO is engaged, it is not necessary to activate a PTO
mode.
In this case, the engine power available for driving the vehicle is reduced (as part of the power is absorbed by the superstructure),
which may lead to difficulties when setting off from a standstill. In certain specific applications (concrete mixer, refuse collection
etc.), this problem may be resolved by increasing the idle speed value (”low idle”).
If limitations are necessary (e.g. torque limiting, max. rpm etc.), a PTO mode must be activated.
▶
Especially with the vehicle in motion, always bear in mind that activating a PTO mode also re-
calls the stored intermediate engine speed, which may result in unrequested vehicle accelera-
tion. The bodybuilder must ensure the safety of the vehicle during operation.
The conditions for PTO engagement and disengagement depend on the PTO itself and on the requisites of the bodybuilder.
For example: vehicle driving (up to max. 30 Km/h) with increased engine speed and PTO engaged.
Certain applications (tipper beds, concrete mixers, refuse collection etc.) also require higher engine speeds for manoeuvring. This
may be achieved as follows:
storing intermediate engine speed setting
N
RES
fixed programming
intermediate engine speed setting N
RES
defined by bodybuilder
deactivating intermediate engine speed deactivating with clutch or brake
accelerator pedal Active
CC buttons: disabled