Volvo D13, Руководство по установке

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Governor mode select
When several engines are used together, divergences
in engine performance may result in an uneven load
share.
If the engine is running in 'Engine speed mode', a small
offset from demanded engine speed will over time
result in a large change in engine output torque.
When the 'Governor mode select' is changed from
'Engine speed mode' to 'Torque mode', the target
engine speed will be automatically changed for all
engines individually, to achieve an equal load share.
Depending on Variable speed or Genset configuration,
'Torque mode' has different effects on the target
engine speed.
For single engine control or when the 'Governor mode
select' signal is not used, it must be set to 'Not availa-
ble'.
Variable speed
In Variable speed engines, 'Torque mode' will add a
negative offset to the target speed when increasing the
torque.
n
target
= n
dem
- n
delta
n
delta
= Trq
output
[Nm] / GovGradient [Nm/rpm]
GovGradient is a fixed value that can be set using an
aftermarket tool.
Example: If the GovGradient is set to 100, every 100
Nm torque increase will result in a 1 rpm decrease in
target speed in the engine speed controller.
When the engine torque output is very high, the aver-
age engine speed will drop slightly, and the demanded
speed may need to be adjusted.
n
dem
n
delta
=
1 rpm
n
target
B
=
Trq
output 100
C
Engine torque (Nm)
Engine speed (rpm)
0
}
A
P0020852
Example: GovGradient for Variable speed engines.
A Engine speed (rpm)
B Torque output
C Engine torque (Nm)
Engine control interface, Governor mode select
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