Excellence in Custom Marine Equipment and Propulsion Systems

BENTLEY Marine Aluminum Diesel / LNG Engines & Gear Boxes

 
    BENTLEY MARINE recently unveiled a unique line of custom built Marine Aluminum Diesel engines and gear boxes with no parallel in the world. The ultra compact and lightweight aluminum Diesels boost high horsepower to weight ratio and are ideal for commercial and military applications where speed, space and weight savings are paramount.

        The engines are designed to run on either Diesel, Biodiesel or non-flammable cryogenic Liquefied Natural Gas (LNG) with equal outstanding performance. The LNG versions are based on an innovative sparkless technology which instead of using spark plugs to ignite the mixture, uses 3% to 5% of Diesel fuel, thus retaining the maximum design performance of the engines through the entire power band with no power losses. BENTLEY MARINE Aluminum engines are not only environmentally friendly, they are the cleanest marine engines on the market today, exceeding all IMO and EPA future emission requirements.

    With three basic configurations - a four stroke turbocharged and intercooled V-12 with cylinder banks inclined 60 to each other with output power up to 1500HP and the extraordinary Radial series, the only Marine Radial Diesel engines available on the market, which come in two configurations: a four stroke turbocharged and intercooled 42 cylinders with seven banks containing six cylinders each, for up to 4000HP and a 56 cylinders version with eight cylinders per bank for up to 5350HP. Over thirty models are available in total, with integral or non–integral aluminum gear boxes, to suit the most demanding applications, including a twin 56cylinders engine for a brute 10,000HP output. All engines are custom built to order and delivered turn-key.

      Unlike production Diesel engines, in order to insure maximum quality BENTLEY MARINE custom built Aluminum Diesel engines and gear boxes have all its integral parts manufactured in the same plant. After assembly, all engines are vigorously tested, then completely disassembled for inspection under the strict BENTLEY MARINE Total Quality Control Program and reassembled before delivery and installation by a team of certified factory technicians. A two year full warranty coverage is standard on all BENTLEY MARINE Aluminum Diesel engines and gear boxes.

   BENTLEY MARINE Aluminum Gearbox

    BENTLEY MARINE understands well, how important it is for its clients to have peace of mind and total dependability on the engines. Therefore it offers a personalized around the clock maintenance and repair service 365 days a year and, because the engines are not mass produced, clients enjoy having onboard the same technician that originally installed or commissioned the engines, thus enabling quicker diagnosis and repairs. "It’s that simple, the client calls us in and in 48hs we guarantee a technician will be onboard anywhere in the world" - explains John F. Rodrigues, President & CEO of BENTLEY MARINE. 


John F. Rodrigues with the unique BENTLEY MARINE Radial 42 cylinders and V-12 Aluminum engines


Electronic drive-by-wire throttle control with integrated digital engine monitoring & alarm display
(available for fixed or variable pitch propellers)

V-12 Series: (Four-stroke, turbocharged, 12-cylinder, V-engine 60, B=180mm, S=200mm)

Engine Model Rated power (ISO 3046/1) - kW, (RPM) Dimensions LxWxH,
(mm)
Dry weight,
(kg)
Continuous power Fuel stop power
BM470 990kW @ 1550RPM

1100kW @ 1600RPM
(1500HP)

2730x1150x1285 2700
BM470M 2950x1250x1455 3000
BM-DRA470M 3545x1150x1285 3200
BM-DRA472 (*)x1260x1270 3150
(*) - depends on the intermediate shaft length

NOTE: All BENTLEY MARINE engine dimensions & weight are calculated with their respective integral gearboxes.


    BENTLEY MARINE V-12's are  4 stroke engines with blocks inclined 60 to each other, with direct fuel injection, turbocharged and intercooled. Bore is 180mm and Stroke 200mm, in a total displacement of 62.4 Liters.

The engines operate at a low 1600RPM which provide for much quieter operation and a extremely long service life of up to 8000 hours (TBO) time before the first overhaul and up to 20000 hours before major overhaul. Fuel consumption for the 1600HP (1100kW) models are a mere 200 g/kW-h.

     The innovative and modern design of the  BENTLEY MARINE V-12 Series incorporates a dry sump crankcase lubrication system and  the possibility of mounting the turbo compressor and gas exhaust manifold in either side of the engine to facilitate installation. Another main advantage of the V-12 Series is that all auxiliary systems are integrated into the engine, such as oil filters, oil coolers, thermostatic valves and control actuators, making it into a one very compact and easy to service unit. The incorporation of all auxiliary systems into the engine help prevent and avoid possible leaks and malfunction commonly associated with remotely mounted auxiliary systems like most
production Diesel engines.

BENTLEY MARINE Aluminum V-12 Series can be ordered with either left (clockwise) or right (anti-clockwise) rotation, thus balancing the rotational forces of the propellers for a much more efficient propulsion.

     Several custom gear box configurations are available to be either incorporated into the engine itself or externally mounted, with a range of reduction gear ratios and V-drives with inclinations up to 15. For applications that demand maximum torque at various speeds, an automatic four speed gear box is also available.

Delivery is generally 3 to 4 months from the order's date.

Dare to Compare!
(Comparable engines must have similar displacement & horsepower rated at continuous duty)

The closest comparable, Caterpillar 3512 Series, has either a 52 or 59 Liters displacement and weights more than double than BENTLEY MARINE's V-12 Series with integral gearbox. The new light duty Caterpillar C30 with a displacement of only 30 Liters, which is less than half of the displacement of BENTLEY MARINE's V-12 Series (62.4 Liters) is not really a contender, but weights the same as BENTLEY MARINE V-12 series (only 153 kg less) and is still wider and taller.
  The closest MTU comparable is the 12V 4000 M60R which still has a much lower displacement than BENTLEY MARINE's V-12 Series and even than Caterpillar 3512 Series, at only 48.7 Liters, and yet weights almost three times more than BENTLEY MARINE's V-12 Series and consumes more fuel, with a fuel consumption of 205 g/kW-h. Although the other two MTU engines rated at the same power are absolutely no contenders, as the 12V 2000 M91 has a displacement of only 24 Liters and the 8V 4000 M70 a displacement of only 32.5, yet both of them weight more than BENTLEY MARINE V-12 Series Aluminum Diesels (actually the 8V 4000 M70 weights double) and yet consume way more fuel, at 227 g/kW-h for the 12V 2000 M91 and 213 g/kW-h for the  8V 4000 M70. 

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
CATERPILLAR
3512
- 1119kW @ 1800RPM
(1500HP)
2895x1703x2052 6532
CATERPILLAR
3512B
- 1380kW @ 1600RPM
(1850HP)
3038x1988x2073 5892
CATERPILLAR
C30
- 1156kW @ 2300RPM
(1550HP)
1997x1412x1378 2547
MTU
12V 2000 M91
  1103kW @ 2350RPM
(1479HP)
2350x1400x1230 3440
MTU
8V 4000 M70
  1160kW @ 2000RPM
(1556HP)
3065x1318x1985 6195
MTU
12V 4000 M60R
  1050kW @ 1600RPM
(1408HP)
4185x1520x2105 8685

 

RADIAL 42 Cylinder Series:
(Four-stroke, supercharged & turbocharged, with heptagonal radial scheme, B=160mm, S=170mm)

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
BM503A-3 2425 (2000) 2940kW @ 2200RPM
(4000HP)
3700x1555x1560 5450
BM532A 2350 (1900) 2650kW @ 1780RPM 3700x1555x1560 5450


The BENTLEY MARINE 42Cylinder Series Radial Aluminum engines are the only one of its kind in the world!

The 42 Cylinder Series produce up to 2940Kw or about 4000HP in a very compact and lightweight envelope unmatched by any other Diesel engine.

    This technology masterpiece is a 4 stroke radial engine with seven blocks of six cylinders each inclined 5125'43" to each other, with direct fuel injection, turbocharged and intercooled. Bore is 160mm and Stroke 170mm, in a total of 147 Liters,   turning smoothly at 2200RPM for a service life of up to 4000 hours before the first overhaul and up to 10000 hours before major overhaul. They also have a low fuel consumption of only 226 g/kW-h.

     As all BENTLEY MARINE Diesel engines, the 42 Cylinder Series incorporate a dry sump crankcase lubrication system with all its auxiliary systems integrated into the engine (oil filters, oil coolers, thermostatic valves and control actuators).

    The outstanding BENTLEY MARINE 42 and 56 Cylinder Series are the only Diesel engines in the world available with integral reversible gearboxes or hydraulic transmission for parallel operation with gas turbines.

Dare to Compare!

The comparable 148 Liters Caterpillar engine weights 13,550kg more without the respective gearbox. That is over three times  the weight of BENTLEY MARINE's 42 Cylinder Series Aluminum engines with the integral gearboxes. MTU, with less than half of the displacement (65 Liters) is not really a comparable engine, but still weights almost double of the weight of   BENTLEY MARINE's 147 Liters engine with the integral gearbox. Additionally, Caterpillar and MTU are also much longer, wider and taller than BENTLEY MARINE's 42 Cylinder Series Aluminum Diesel engines.

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
CATERPILLAR
3608
- 2710kW @ 1000RPM
(3634HP)
5561x1722x2641 19000
MTU
16V 4000 M90
  2720kW @ 2100RPM
(3648HP)
4525x1520x1890 9505

    

RADIAL 56 Cylinder Series:
(Four-stroke, supercharged & turbocharged, with heptagonal radial scheme, B=160mm, S=170mm)
 

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
BM520 3600 (1900) 3970kW @ 2000RPM
(5320HP)
4400x1675x1675 7250
BM533 3676 (2000) 3970kW @ 2000RPM 4400x1675x1675 7300

 

The BENTLEY MARINE  56 Cylinder Series Radial Aluminum engines boost up to 3970kW or about 5320HP.

     The world's highest power to weight ratio Diesel engines feature 4 stroke radial configuration with seven blocks of eight cylinders each inclined 5125'43" to each other, with direct fuel injection, turbocharged and intercooled. The BENTLEY MARINE 56 Cylinder Series share the same 160mm Bore and 170mm Stroke of the 42 cylinder Series, but with an additional two cylinders per block (eight instead of six), giving a total displacement of 196 Liters.

     They operate quietly and smoothly at 2000RPM. The moderate operational speed gives them a service life of up to 4000 hours before the first overhaul and up to 10000 hours before major overhaul. As all BENTLEY MARINE Diesel engines they can burn Diesel or clean fuels such as Biodiesel or LNG (natural gas), for an environmentally friendly propulsion system.  The 56 Cylinder Series has a low fuel consumption of   225 g/kW-h.

Dare to Compare!

Caterpillar's closest competitor, with a displacement of  222 Liters  weights a whopping 18730 kg more without the respective gearbox or, over three times the weight of BENTLEY MARINE's 56 Cylinder Series Aluminum engines with their integral gearboxes, while MTU has no comparable engines in this horsepower range.

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
CATERPILLAR
3612
- 4060kW @ 1000RPM
(5444HP)
4861x1741x3550 25980


   

RADIAL 112 Cylinder Series (2x 56 Cylinder combined):
(Four-stroke, supercharged & turbocharged, with heptagonal radial scheme, B=160mm, S=170mm)

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
BM507A-2 - 7360kW @ 2000RPM
(10000HP)
7000x1820x2490 17100

Dare to Compare!

The comparable 333 Liters Caterpillar engine without the respective gearbox weights a massive 20,800kg more than BENTLEY MARINE's 112 Cylinder Aluminum engine, while the MTU with almost half of the displacement (232 Liters) still weights 8210 kg more than BENTLEY MARINE's 392 Liters engine with the integrated gearbox. Additionally, Caterpillar and MTU are also much wider and taller than BENTLEY MARINE's 112Cylinder Series.

Engine Model Rated power (ISO 3046/1) - kW, (RPM)

Dimensions LxWxH
(mm)

Dry weight,
(kg)

Continuous power Fuel stop power
CATERPILLAR
3618
- 7200kW @ 1050RPM
(9655HP)
6113x2161x3462 37900
MTU
20V 1163 TB93
- 7400kW @ 1300RPM
(10000HP)
5140x1880x3780 25310


HIGH-POWER PTO DRIVEN GENSETS

   NEW: All BENTLEY MARINE Aluminum Diesel engines can be ordered with new ultra compact and lightweight variable speed computer-controlled Gensets of 65kW, 85kW and 350kW. The units are connected to the engine via the PTO (Power-Take-Off) gearbox. The innovative energy efficient system enables the ship to automatically shut-down the auxiliary Genset when the main propulsion engines are running, thus saving lots of fuel.


For more information on BENTLEY MARINE Aluminum Diesel Engines and Gearboxes, please contact us.

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