Volvo D4, Руководство оператора

Страница: 54 / 126

52
Operation
Cruising speed
Avoid operation at full throttle, for best fuel economy. We
recommend a cruising speed which is at least 10% below
the maximum engine speed at full speed (full throttle). The
maximum engine speed will vary due to propeller choice,
load and sea conditions, but it should be in the full throttle
range.
Full throttle range:
D4 ...................................................... 3400–3600 rpm
D6 ...................................................... 3400–3600 rpm
If the engine does not reach the full throttle range, this
could be caused by a number of factors which are noted
in the “Fault tracing” chapter. If the engine speed exceeds
the full throttle range, select a coarser pitch propeller. Ask
your Volvo Penta dealer for advice.
Synchronizing engine speed
When driving with twin engines, both the operating eco-
nomy and comfort can be increased when the engines are
operating at the same engine speed (rpm).
The synchronization function is indicated by a blue equals
sign (1) on the EVC control panel.
When the synchronization function is activated, the engine
speed (rpm) of the starboard engine is automatically adjus-
ted to that of the port engine. The synchronization function
is activated automatically if the following conditions are met.
1. The engine speed levers for both engines are in (approx-
imately) the same position.
2. The engine speed on both engines must exceed 800
rpm.
NOTE! The synchronizer is disengaged as soon as the
conditions are no longer met.
1