Flame-start system indicator lamp Flame-start system indicator lamp (example)
(example)
Following the preglow time, which is Following the preglow time, which is de-pendent on t
pendent on the outside temperaturhe outside temperature e (max- (max-imum 20 seconds), the flame-start system imum 20 seconds), the flame-start system is activated and the flame-start indicator is activated and the flame-start indicator lamp goes out.
lamp goes out.
Once the engine has been s
Once the engine has been statarted, therted, the flame-start system is supplied with f flame-start system is supplied with fuuel byel by the fuel pump.
the fuel pump.
The flame-start system is only enabled if The flame-start system is only enabled if the engine is started within 30 seconds of the engine is started within 30 seconds of the flame-start system indicator lamp the flame-start system indicator lamp go-ing out.
ing out.
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If the flame-start system indicat
If the flame-start system indicator lampor lamp does not go out after mor
does not go out after more than 20 sec-e than 20 sec-onds, there is a malfunction in
onds, there is a malfunction in thethe flame-start system.
flame-start system.
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For operation at low outside For operation at low outside temper-atures, see also the “
atures, see also the “Diesel fuelsDiesel fuels””
((papagege 661)1) and “ and “CoolantCoolant””
((papagege 666)6) sections. sections.
Before commissioning
To increase the
To increase the brakibraking power, the enginesng power, the engines can be equipped with an exhaust brake can be equipped with an exhaust brake valve on the exhaust gas turbocharger in valve on the exhaust gas turbocharger in conjunction with constantly-open throttle conjunction with constantly-open throttle valves on the
valves on the cylicylinders.nders.
Where
Whereas as exhaust gas exhaust gas backbackpressurepressure, a, actingcting through the exhaust brake valves, can be through the exhaust brake valves, can be used to increase the braking power, used to increase the braking power, the constantly-open throttle valves cause the constantly-open throttle valves cause a reduction of compression in the power a reduction of compression in the power stroke (3rd stroke), leaving compression stroke (3rd stroke), leaving compression (2nd
(2nd stroke) prastroke) practically ctically unaffectedunaffected..
The constantly-open throttle valves are The constantly-open throttle valves are valves in the cylinder head. When open, valves in the cylinder head. When open, they connect the combustion chamber they connect the combustion chamber to
to the exhathe exhaust duct, wust duct, which ghich generates enerates thethe required decompression in the power required decompression in the power stroke.
stroke.
Activ
Activation of ation of the constantly open throttlethe constantly open throttle valves
valves
When the engine brake is activated, the When the engine brake is activated, the constantly-open throttl
constantly-open throttle valves are openee valves are openedd by compressed air. At the same time, the by compressed air. At the same time, the exhaust brake valve on the exhaust gas exhaust brake valve on the exhaust gas turbocharger is closed.
turbocharger is closed.
The engine brake is controlled by the drive The engine brake is controlled by the drive control unit
control unit ((papagege 32)32) or the ADM.or the ADM.
The engine brake always remains The engine brake always remains deacti-vated at
vated at engine speeengine speeds of belods of below 900w 900 rpmrpm to prevent the engine from stalling. The to prevent the engine from stalling. The engine brake
engine brake is also automaticallis also automatically deay deacti- cti-vated if the
vated if the positposition sensor is triggeredion sensor is triggered (e.g. if
(e.g. if the accelerthe accelerator pedal is depressed).ator pedal is depressed).
Engine brake*/constantly-open Engine brake*/constantly-open throt
throttle valtle valves*ves*
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In t
In the emergenche emergency ry runninunning prg prograogramm (constant engine speed), the engine (constant engine speed), the engine brake can only be
brake can only be activated in overrunactivated in overrun mode at an increased engine speed.
mode at an increased engine speed.
The engine
The engine brakbrake e is automaticalis automatically dly deac- eac-tivated again once a constant engine tivated again once a constant engine speed has been reached.
speed has been reached.
Before commissioning
The engine has a fully electronic cofully electronic controlntrol system, which, in addition to t
system, which, in addition to the enginehe engine and associated sensors, also comprises:
and associated sensors, also comprises:
an MR (engine control) unit andan MR (engine control) unit and
an FR (drian FR (drive control) unit ve control) unit andand //or otheror other
vehicle-vehicle-specific control units, specific control units, e.g. Ae.g. ADMDM Both are interconnected via a CAN Both are interconnected via a CAN (Con-troller Area Network) line, on which all the troller Area Network) line, on which all the necessary d
necessary dataata//information is einformation is exchanged.xchanged.
The engine control monitors itself as well The engine control monitors itself as well as
as the engine. A safety and emergencthe engine. A safety and emergency run-y run-ning
ning proprogram igram is selected automaticalls selected automatically,y, depending on the malfunctions/system depending on the malfunctions/system failures that occur
failures that occur ((papaggee 4141).).
MR (engine control) unit
MR (engine control) unit(mounted on(mounted on the engine)
the engine)
The MR (engine contr
The MR (engine control) unit is mounted onol) unit is mounted on the right-hand side of the e
the right-hand side of the engine.ngine.
MR (engine control) unit MR (engine control) unit
The MR (engine control) unit processes The MR (engine control) unit processes data from the drive
data from the drive contcontrol unit or rol unit or thethe ADM, indicating for example the position ADM, indicating for example the position of the position sensor (accelerator pedal), of the position sensor (accelerator pedal), the engine brake* or engine start/stop, the engine brake* or engine start/stop, etc.
etc.
Telligent
Telligent®® engine system engine system
Before commissioning General information
2
This data is evaluated along with data from the sensors on the engine, such as those for:
charge-air pressure and temperature
coolant temperature
fuel temperature
oil pressure
The data is compared with the maps and characteristic curves stored in the engine control unit.
Injection timing, period and volume are calculated based on these comparisons and the solenoid valves are actuated to
adjust the unit pumps accordingly. Control unit type plate
1
Data record2
Certification no.3
Engine number4
Equipment codei
All the information on the control unit type plate is required to obtain a re-placement engine control unit.
Before commissioning General information
2
FR (drive control) unit or ADM(mounted on the equipment)
The engine can be adapted to meet various application-specific requirements by means of the drive control unit or adapta-tion module (ADM).
FR (drive control) unit
The FR (drive control) unit or the ADM stores a range of application-specific data, such as idling speed, maximum working speed or speed limitation.
The FR (drive control) unit or the ADM re-ceive data from the:
operator (position of the position sen-sor, engine start/stop)
engine brake switch*
other systems (e.g. acceleration skid control system)
MR (engine control) unit (e.g. oil pres-sure and coolant temperature)
This data is used to determine the instruc-tions for engine control (MR control unit), which are then sent to the engine control on the CAN line.
The FR (drive control) unit or the ADM con-trols various displays, e.g. the electronics warning lamp, the engine brake* and the constantly-open throttle valves*.
If the Telligent® engine system detects a fault, this is stored in the control units as a fault code, which can then be read using appropriate diagnostic equipment (STAR DIAGNOSIS or minidiag2).
In addition, the electronics warning lamp lights up.
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The DaimlerChrysler diagnostic ment can be connected to the equip-ment-mounted 14-pin diagnostic sock-et or using the EU-compliant service connector. This equipment can be used to read both the malfunction memory and the stored engine data.
Before commissioning General information
2
Diagnostic socket
EU-compliant service connector
Organisational measures
The Operating Instructions and Mainte-nance Booklet must be given to the per-sonnel responsible for operating or car-rying out work on the engine, and should be kept in an easily accessible location where the engine is used.
These Operating Instructions must be used to instruct personnel how to handle the en-gine. In particular, the notes concerning safety must be explained. This is especially important for personnel who only work on the engine occasionally.
All universally applicable, country-specific, legal and other mandatory regulations for accident prevention and protection of the environment must be observed in addition to these Operating Instructions.
Risk of injury
G
Before operating the engine, please read these Operating Instructions and other rele-vant documentation, such as the operating instructions for the vehicle or the machine the engine is installed in.
You could otherwise fail to recognise dan-gers and could injure yourself or others.