Volvo D4, Operator'S Manual

Page: 17 / 126

15
Presentation
The EVC system
The Electronic Vessel Control (EVC) system is a so
called distributed system. The principle of a distrib-
uted system is to have many small electonic units,
called nodes, located on suitable places in the boat.
The EVC nodes are the Powertrain Control Unit
(PCU) and the Helm station Control Unit (HCU).
Nodes are located close to the components they
control. A helm node is located close to the helm. A
powertrain node is mounted in the engine room.
Each node controls a number of adjacent compo-
nents, for example sensors, controls, instruments and
actuators.
Each PCU and HCU is programmed for a specific
engine individual. On the PCU and HCU there is a
sticker with chassis no. The chassis no. shall corre-
spond to the sticker on the engine.
A data bus, a CAN bus, connects the nodes to each
other. Together they form a network and exchange
information and take advantage of each others’ serv-
ices. The principle of forming a network of nodes to
which all components are connected reduces wiring
radically.
CAN stands for Controller Area Network, an industry
standard for communication between nodes in distrib-
uted systems.
A distributed system supports a growing multiplicity
of system configurations and optional features. New
nodes can be connnected to the network with mini-
mal wiring redesign. New effective functionality can
be created by letting the nodes interact and combine
their capabilities, creating a more useful and safe
product.
Functionalities
Engine speed and gear shift
Speed and gear shift contol is handled electronically.
The reverse gear or stern drive has high speed shift-
ing protection. Dual function electronic controls works
in the EVC system as well as mechanical controls
with control adapters.
Engine synchronization
Engine synchronization results in better comfort,
good fuel ecomomy and minimized wear due to less
vibration and reduced noise level. To enable syn-
chronization the master (port) and slave (starboard)
systems must be able to communicate. Therefore a
synchronization cable has to be installed at the each
helm.
Instrumentation
New types of instruments are introduced with EVC.
The instruments use a serial communication bus. The
serial comminication bus in combination with EVC
radically reduces wiring and simplifies installation.
The gauges are available with white or black dial face
and chromed or black bezel.
Power Trim
The function is considerably improved compared
to non EVC governed PowerTrim systems. EVC in-
troduces a new trim panel with the same design as
other EVC control panels. If you have a twin engine
installation the stern drives can be both individually
and simultaneously controlled.
Trimming in and out can be calibrated to suit the spe-
cific installation. To protect the drive it cannot be tilted
when engine is running above a certain rpm.
The PowerTrim control panel shall be connected to
the multilink bus and the gauge to the instrument
cable harness from the HCU. The cable harness for
stern drives has connectors for the power trim angle
sensor and the power trim pump.
Extra optional equipment
Display
The EVC display is a complement or replacement for
the instruments. The functionality of the EVC display
reminds of the functionality of the EDC display but
the information has been extended.
The EVC display must be connected to the HCU.
Fuel level
EVC enables easy installation of the fuel level indica-
tion. All you need is a fuel level sensor in the fuel tank
and a fuel level gauge or a display at the helm. If a
fuel level gauge is used it shall be connected to the
instrument serial communication bus. The PCU–en-
gine cable harness has an input for the fuel level
sender.
Boat speed
Boat speed can be shown in a display and in a
speedometer, if you have a NMEA 0183 compatible
GPS.