Operation Manual / A130-M.. - A145-M..
5 Monitoring operation / 5.1 Oil pressure, oil temperature
© Copyright 2022 ABB. All rights reserved.
HZTL4031_EN
Rev.P
February 2022
5
Monitoring operation
5.1
Oil pressure, oil temperature
Lubricating oil pressure, oil inlet
To limit the oil flow rate through the turbocharger to the admissible values with the engine
at full load, an oil orifice is mandatory or already fitted at the turbocharger oil inlet if the oil
inlet pressure is > 3 bar.
CAUTION
Assuring lubricating oil pressure
Serious damage to the engine or property can result from a missing or insuf-
ficient lubricating oil supply.
u
The lubricating oil pressure must be monitored during operation and the
necessary pressure assured at the oil inlet.
Status for operation
Pressure at oil inlet upstream of
the turbocharger
[bar] Overpressure
Normal operation
2.0 < p
oil
≤ 4.5 *)
Engine start: Cold oil, admissible for a maximum of 15
minutes
< 8.0
Engine idling, admissible for a maximum of 1 hour
0.5 < p
oil
≤ 2.5
Pre-lubrication and post-lubrication (engine stopped)
0.5 < p
oil
≤ 1.0
Warning signal: (n ≥ 0.5 x n
Bmax
)
< 1.25
Alarm signal: Not admissible. Stop the engine immedi-
ately.
< 0.6
Table 8: Lubricating oil pressure at oil inlet before turbocharger
*) Depending on use of an oil orifice in accordance with the enginebuilder’s specifications.
Arrangement of temperature and pressure measuring points
01 Turbocharger contact surface
02 Oil inlet
03 Oil outlet
P
Oil pressure measuring point
T
Oil temperature measuring point
For monitoring the lubricating oil pressure, Turbo Systems recommends installing a "P"
manometer immediately upstream of the turbocharger oil inlet before the orifice. If the
pressure is controlled electronically, the relevant signals should be triggered at the warning
and alarm values.
*) If the drain pipe is vented, the lubricating oil temperature measuring point can be installed
at the outlet in the vent tank. Otherwise the measurement should be taken in the drain pipe
as close to the turbocharger as possible.
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