AD31/DP

AD31/DP
VOLVO PENTA AQUAMATIC DUOPROP
AD31/DP
4-cylinder, 4-stroke, direct-injected turbocharged marine diesel engine
with aftercooler and Duoprop drive. 96–110 kW (130–150 hp)*
* Crankshaft power according to ISO 8665
Reliable marine engine
AD31L/P is a reliable and economic marine
engine with considerable power resources,
developed for planing craft. With its compact dimensions, it is excellent for twin installation.
Direct injection
Direct injection (DI) results in a low thermal
load and low fuel consumption compared
with swirl chamber engines (IDI) with the
same cylinder capacity.
Turbocharging
The engine is turbocharged with an exhaust-driven turbocompressor. More air
can be forced into the cylinder in this way
with the result that more fuel can be injected and the engine runs more efficiently.
Since combustion takes place in a turbo
engine with excess air, the exhaust gases
are cleaner than in a naturally-aspirated engine.
The turbo also acts as an additional silencer both on the induction side and on
the exhaust side.
AD31L/P with DP-E
Duoprop drive
Aftercooler
The air heats up and expands when it is
compressed. In other words, it takes up
more space. The aftercooler cools the compressed and heated air and raises its oxygen content so that the engine can use the
fuel more efficiently.
Low exhaust emission levels
The direct injection, turbocharging and aftercooler contribute to minimizing noxious
exhaust emissions and enhancing overall
enjoyment of boating.
DP drive
The DP drive with its twin counter-rotating propellers produces a harmonious drive unit with
unbeatable characteristics in the boat in terms
of speed, acceleration and fuel economy.
It also produces less noise and vibrations, better steering and maneuvering
characteristics, better grip in the water and
a shorter time to planing compared with
single propeller systems.
The drive features standard power steering for maximum driving comfort.
Comprehensive service
network
Lubrication system
— Pressure lubrication system with easily replaced full-flow oil filter on the side of the enVolvo Penta has a well-established network
gine
of authorized service dealers in more than — Tubular oil cooler that can be cleaned
100 countries throughout the world. These Fuel system
service centers offer Genuine Volvo Penta — Rotor-type injection pump with a mechanical governor for accurate speed control
Parts as well as skilled personnel to ensure
— Smoke limiter
that you enjoy the best possible service.
Technical description:
Engine and block
— Cylinder block and cylinder head made of cast
iron for good corrosion resistance and long
service life
— Oil-cooled pistons with two compression rings
and one oil scraper ring
— Replaceable wet cylinder liners
— Replaceable valve seats
— Five-bearing crankshaft
— Fine filter with water separator
— Feed pump with hand primer
— Electrically operated stopping device
Inlet and exhaust system
— Inlet system designed to produce optimal
air rotation which provides perfect combustion. This results in high power and low fuel
consumption
— Inlet silencer with replaceable filter
— Closed crankcase vent system
— Seawater-cooled exhaust elbow of cast iron
with a stainless steel insert
Engine mounting
— Complete connection for exhaust outlet
through the drive
— Flexible mounting which provides sound and
vibration insulation. The engine has two adjust- — Exhaust-driven freshwater-cooled turbocharger
able rubber mounts in front of the engine and
rubber suspension between flywheel housing
and transom shield
AD31/DP
Cooling system
Instrument panel:
Accessories
— Thermostatically regulated freshwater cooling
— Tubular heat exchanger with separate transparent expansion tank
— Gear-driven seawater pump with rubber
impeller
— Coolant system prepared for hot water outlet
— Seawater strainer
Separate instruments and harness or complete
panel fitted with:
— Key switch
— Voltmeter
— Temperature gauge — Rev counter
— Instrument lighting
— Hour meter
— Alarm for temperatu- — Oil pressure gauge
re, oil pressure and — Alarm test
charging
Electrical system
Drive
An extensive range of accessories for:
— Fuel system
— Cooling system
— Control system
— Steering system
— Instruments
— Electric system
— Comfort & Safety
— Propeller & Drive
— Maintenance
For detailed information, please see Accessory
catalogues.
— 12V corrosion-protected electrical system,
complete with instrumentation
— 14V/60A marine alternator
— Charging regulator with battery sensor for
voltage drop compensation
— The alternator is prepared for a bulkheadmounted double-diode set which automatically distributes the charge current to two
separate battery circuits
— Automatic fuse with manual reset
— Starter motor power 3.0 kW
— Extension cable harness with plug-in connection available in various lengths
— Complete with transom shield, flywheel cover and installation components
— The drive can be tilted up by 42°
— Protective zinc anodes prevent corrosion
— The coolant water inlet at the front of the
drive provides a reliable coolant water supply to the engine
— Built-in kick-up function to reduce possible
damage, in the event the drive strikes an underwater object
Power Trim
— Power Trim is an electrically-operated hydraulic system for trimming the drive angle
while in use. The actual trim angle is indicated with five LEDs and a digital display on
the CD Trim instrument
— An analog instrument is also available
Contact your local Volvo Penta dealer for further information.
Not all models, standard equipment and accessories are available in all countries. All specifications are subject to change
without notice.
The engine illustrated may not be entirely identical to production standard engines.
Technical Data
Engine designation ............................................
Crankshaft power, kW (hp) ..............................
Propeller shaft power, kW (hp) .......................
Engine speed, rpm .............................................
Displacement, l (in3) ...........................................
Number of cylinders ...........................................
Bore/stroke, mm (in.) .........................................
Compression ratio ..............................................
Volvo Penta Duoprop drive ..............................
Ratio ......................................................................
Dry weight with DP, incl. prop., kg (lb) ..........
Duty rating ............................................................
AD31P
110 (150)
104 (141)
3900
2.4 (146)
4
92/90 (3.62/3.54)
17.5:1
DP-E
2.3:1
443 (977)
R5–R4
AD31L
96 (130)
90 (122)
3800
2.4 (146)
4
92/90 (3.62/3.54)
17.5:1
DP-E
2.3:1
443 (977)
R5–R3
Technical data according to ISO 8665. Fuel with a lower calorific
value of 42,700 kJ/kg and density of 840 g/liter at 15°C (60°F).
Merchant fuel may differ from this specification which will influence engine power output and fuel consumption.
N.B. The product can also be used in an application with a higher
rating than stated, e.g. R3 can be used for R4 or R5.
Dimensions
AB Volvo Penta
SE-405 08 Göteborg, Sweden
© 2000 AB Volvo Penta.
Not for installation
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