ELECTRONIC SYSTEM OF ENGINE CONTROL AND NEUTRALIZATION OF EXHAUST GASES
The electronic systems have the installed self-diagnostic system and don’t need any technical service but the general check after their repair
and control or after the repair and adjustment of the units connected with them.
Purpose and structure of the electronic system of the engines Deutz (Euro 4)
The engine has the electronic system of fuel delivery (EDC) of Common Rail type, which is used for controlling the dose and lead angle of the
injected fuel. Additionally, in order to ensure the ecological level, the neutralization system of exhausted gases (SCR–Selective Catalytic Reduction)
with the AdBlue injection is fixed on the truck.
Arrangement of the system elements on the chassis is shown in the Fig. 22 (a, b), the arrangement of the elements on the relay board and safety device,
the placing of electronic blocks and signaling indicators (lamps) -- in the Fig. 23. Electrical schemes are shown in the Fig. 24, 25 and 26. Possible
defects and their remedies are shown in the Fig. 7.
Electronic module 6 of the engine (Fig, 22) is connected with the accelerator -pedal position (13), with the switch (TSET), and also with the
indicators of the cover devices and lamps (signaling indicators) through the front-end electronic block 1 or block VECU of the truck, fixed in the cabin,
which forms the CAN bus of the data transmission together with the block of the engine.
Information about speed of the truck is delivered from the terminal B7 of the tachograph 2 to the block VECU and goes through the CAN bus to
the electronic block 6 of the engine.
In the capacity of the sensor which shows the working state of the motor brake the electrical switch VKP –2 (item 14, Fig. 22) is used and it is
activated by driver’s left leg.
Maintenance of rules and safety standards when running the truck with the electronic
system UPS and SCR.
1. Before starting the engine, visually control the lamps on the equipment board, make sure that battery is joined safely and that all systems are
in good conditions.
2. It is categorically forbidden to turn the key of the switch lightning in the position «switched off» during running the truck.
3. Exploitation of the radiotelephones and transmitters, which antenna is inside the truck, can lead to failures of the electronic system and to
disturbance of safe exploitation of the truck.
4. It is forbidden to disengage the battery while engine is running.
5. It is necessary to avoid polarity changing of the battery.
6. Signal lamp of the battery charge mustn’t be alight on the working engine.
7. It is forbidden to use charging station and starting facility for launching of the engine.
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