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Power Take Off

Marinediesel offers various PTO options with all of the engines we manufacture. In fact, the list of applications would be quite large, were we to list them all. Some examples of PTO options we have provided in the past, for both marine and industrial uses include:

  • Alternators
  • Pumps
  • Hydraulic Motors
  • Fire Control Systems
  • Blower Systems
  • Lifts, Davits, and Cranes

In fact, PTO is a standardized option, and a variety of shafts and couplings can be provided, depending on the use. You need merely ask your dealer or distributor to add it to your purchase and we will do the rest!

MD VGT + Jackshaft closeup

Arctic Trucks, Iceland

Short posting today. We were recently in Iceland meeting with Arctic Trucks. A very interesting application for Marinediesel engines. Iceland has both challenging terrain and a challenging environment for any engine. Outside of the capitol, Reykjavik, there are mostly gravel roads, rivers to be forded, and many areas unsuitable for standard passenger cars. Marinediesel allows customized power and torque that can easily meet these challenges.

Arctic Trucks has produced vehicles specifically designed to conquer the environment for over 25 years. Visit their website for more information about their unique products.

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How long will an engine last?

 

How long will an engine last?

This is a fair question, and one which can be fairly difficult to answer given the number of variables involved. Some of the factors that influence engine life include:

Type of engine. Is the engine marine or industrial? Industrial, or on-road engines have a much longer life span than marine engines. Why? Several reasons: Better efficiency of cooling; Less variation in RPM; Typically, much lower resistance (water gives much more resistance than friction from four small tires, in addition to vessels being subject to wind resistance also); Fewer devices that can “go wrong” or break (particularly with the cooling system); Typically higher quality and more consistent quality fuel; Much, much less environmental stress, such as corrosion.

Use. Marine engines typically use higher throttle with more variation than engines used on land. Engines used as gensets, in particular, with a low, continuous RPM tend to last a very long time.

Maintenance. Maintenance performed according to the manual’s maintenance schedule have a significantly longer lifespan and service life.

Environment. The marine environment is harsh. Salt air, corrosion, rust, and contact with water all reduce engine life cycle.

In general, using our Marinediesel 6.6L engine as an example, customers can generally expect to receive a service life from their engines:

Marine: 10,000 to 15,000 hours.

Land: Approximately 1,000,000 km.

Genset: Approximately 80,000 hours.

 

 

 

 

Genset Engines

 

 

Here at MarineDiesel, we often receive inquiries as to whether or not we manufacture generators. The answer is “no”, though we do manufacture engines that can be used to power gensets. Why would someone who needs a generator just purchase an engine?

Quite simply: We can customize the engine for the application.

Most (though not all) generator manufacturers do not manufacture the engines used in the generator. The reason is because providing electrical power is a different specialization than providing mechanical power. There are dozens of different variables in power generation, and the production of standalone models requires many different options and a different manufacturing process.

So, when asked to provide an engine for a generator, we nearly always receive this type of inquiry from either a generator manufacturer or from someone who needs a very specialized generator with needs that “off the shelf” models cannot meet. For instance, we can manufacture engines with customized levels of continuous power or multiple engine maps for different uses of the same genset.

MarineDiesel has, over the years, provided both marine and industrial engines for gensets and applications as widely varied as for electricity on large mining equipment to small fishing boats. We also can often refer people to our customers who are generator manufacturers and specialize in electrical power.

 

 

Our VGT Series for Industrial Use

 

 

As we’ve written in the past, MarineDiesel manufactures engines for both marine use and industrial use. we are licensees of General Motors’ entire line of available engine blocks, and can modify those blocks to meet many different applications.

Our VGT Series is a standardized, marine version of the GM 6.6 L V-8 block. We manufacture these engines as the premier part of our product line.

However, we can also manufacture this engine for industrial use, through our MDPT subsidiary, providing a wide range of power, torque, control, and cooling options. We have manufactured this engine in the past for the following types of projects:

1. Tanks

2. Amphibious vehicles

3. Airboats

4. Generators

5. Pumps

6. Winches

7. Railroad

Take a look at the specifications below, and contact us today with any projects where this engine could provide a solution.

Specifications:

Engine Model: VGT

Displacement: 6.6 litre

Cylinders: 8

Bore X stroke: 103 X 99 mm

Power: 100-280Kw depending on rpm and application

Compression ratio: 16,0

Turbocharger type: VGT

Fuel type: Diesel

Min working temp: -30C

Fuel system: Bosch common rail 1800bar

Weight: approx 360kg (dep on accessories)

Size (LXWXH): 812 X 680 X 780 mm

Scope of Supply:

  • Starter motor and alternator
  • Exhaust manifold and turbocharger
  • Intake manifold and basic air filtration system
  • Integrated oil cooler
  • Integrated oil filter
  • Integrated fuel filter
  • Belt system and tensioner
  • Flywheel
  • Engine wiring harness and ECU (J1939)
  • BTU data for sizing radiator and intercooler
  • Diagnostics software

Options:

  • SAE #3 bell housing and matching coupler
  • Cooling package including radiator, intercooler, electric fan, hoses etc
  • Engine monitoring displays of different sizes
  • Multiple engine mounting options
  • Multiple calibration options for continuous and variable speed applications and different duty cycles.
  • Multiple air intake option
  • Multiple exhaust system options
  • Private label diagnostics software (with your company logo)
  • Diagnostics and mechanical training
  • Hardware CAN cable for diagnostics software
  • Emissions certifications
  • NATO Milspec certification
  • After treatment components

 

 

Engine Comparisons: MDPT 6.6L Land Vehicles

 

 

Recent comparison of the MDPT 6.6L engine modified for off-road land vehicle use in extreme climates:

Specifications:

Engine Model: MDPT VGT

Displacement: 6.6 litre

Cylinders: 8

Bore X stroke: 103 X 99 mm

Power: 100-280Kw depending on rpm and application

Compression ratio: 16,0

Turbocharger type: VGT

Fuel type: Diesel

Min working temp: -30C

Fuel system: Bosch common rail 1800bar

Weight: approx 360kg (dep on accessories)

Size (LXWXH): 812 X 680 X 780 mm

Scope of Supply:

  • Starter motor and alternator
  • Exhaust manifold and turbocharger
  • Intake manifold and basic air filtration system
  • Integrated oil cooler
  • Integrated oil filter
  • Integrated fuel filter
  • Belt system and tensioner
  • Flywheel
  • Engine wiring harness and ECU (J1939)
  • BTU data for sizing radiator and intercooler
  • Diagnostics software

Options:

  • SAE #3 bell housing and matching coupler
  • Cooling package including radiator, intercooler, electric fan, hoses etc
  • Engine monitoring displays of different sizes
  • Multiple engine mounting options
  • Multiple calibration options for continuous and variable speed applications and different

duty cycles.

  • Multiple air intake option
  • Multiple exhaust system options
  • Private label diagnostics software (with your company logo)
  • Diagnostics and mechanical training
  • Hardware CAN cable for diagnostics software
  • Emissions certifications
  • NATO Milspec certification
  • After treatment components

 

BENEFITS OF MDPT ENGINES:

1. Extended Life Cycle: MDPT engines have a much longer life cycle than competing engines. There are several reasons as to why. First, the GM block has been produced in the millions of units, and is currently used by military organizations around the world. The reliability is unmatched. The MTBO of MDPT engines can range from 2,500 hours to over 5,000 hours depending on rating, climate, use, and engine MAP. At an average cost of a rebuild exceeding 60% of the cost of replacement, this long life cycle translates into thousands of Euros per year in savings. Additionally, the power and torque curves of competing engines show “spikes” that increase strain and wear of not only engines, but other vehicle components, and thus significantly shorten the life cycle and service intervals necessary to keep the engines running. Competing engines typically start with larger engines that are de-rated in order to provide a longer life cycle. The MDPT engines are designed specifically for compact, light, long life applications. The VGT Series is NATO compliant and certificates can be issued.

2. Customizable: Truck engines are designed to provide a huge amount of torque at the outset, and gradually decrease as momentum is maintained on a highway. This situation rarely occurs with off-road vehicles. The NIRA ECU in MDPT engines is completely customizable. Cummins and other manufacturers tend to use Bosch ECUs for engine controls that cannot be changed without significant extra expenditures (If it can be done at all. The Bosch ECU itself is limited in functionality.) What does this all mean? For instance, MDPT can “shift” the power and torque curves based on customer requirements. For example, with amphibious vehicles, MDPT engines can be programmed to allow more torque and power while operating amphibious, all at a touch of a switch by the operator. This functionality is known as an engine MAP, and MDPT can allow multiple MAPs that can easily be altered based on customer requirements. Other examples:

  • Use of the vehicle in urban settings
  • Use under extreme environmental conditions
  • Optimized for speed on-road
  • Optimized for use off-road
  • Extra torque for rapid acceleration

3. Reduced Vibration and Noise: MDPT engines are a V-8 configuration that, due to the laws of physics, produce far lower levels of torsional vibration than inline 6-cylinder engines.  As to noise, MDPT engines are among the quietest in the market. MDPT has extensive experience with noise reduction and control. Engine noise can be minimized before shipment in our test bays and labs, and further reduced by engineering design and aftermarket silencing systems that we can package with the engine.

4. Light Weight: The MDPT VGT Series of engines weigh a mere 360 kg, compared to the Cummins ISB at 485 kg or the QSB5.9 at over 500 kg. The MDPT engines were designed for high power to weight ratio. Competing engines are de-rated from higher horsepower, and are thus much heavier.

5. Torque: Competing engines have torque curves that sharply spike on the low end of the RPM range and then sharply decrease. MDPT engines feature torque curves that evenly distribute the torque produced at a high level along the entire curve.

6. Engineering: MDPT provides a complete turnkey package. Factory supervision and consultation will be provided from initial engineering, to drawings, to installation, commissioning, mechanical training, and operations training.

7. Rating for Climate: MDPT engines come rated for the local climate. Customers in tropical climates will not see the power loss that is commonly seen with competing engines.

8. Emissions: MDPT engines are in compliance with Tier IV off-road requirements in the EU or USA.

9. Fuel Efficiency: The VGT turbochargers on MDPT engines provide high power while minimizing fuel consumption, to a far greater extent than older, mechanical engines.

10. Compact Size: MDPT engines are designed to fit in compact engine compartments. We are one of the smallest engines in terms of size on the market.

11. Extended Warranty: An extended warranty is available.

engine comp

MD:                                       812 X 680 X 780

Cummins:                       844 X 950 X 857

Scania:                               1406 X 861 X 1113

CAT:                                     1089 X 986 X 970

Iveco:                                  1017 X 805 X 790

 

Curves:

MDPT:

vgt torque

Cummins:

cummins torque

Scania:

scania torque

scania power

CAT:

cat torque

 

Iveco:

Iveco torque

Cost / Benefit Analysis: LPG Engine to Power Generator

 

 

The following article is a cost / benefit analysis we prepared recently for a MarineDiesel customer showing a financial case for using LPG instead of diesel to power a medium  sized generator. The customer name has been removed, and costs are converted to Euros at local rates (prices will vary, based on your region, but this is a good, general comparison). The engine p

roposed is based on the 5.7L GM Vortec engine block.

Initial benefits of the MarineDiesel product line include:

  1. The ability to use LPG instead of gasoline or diesel for power.
  2. Customer payback time in a matter of months through fuel cost savings.
  3. Multiple markets for the engines, ranging in use from small generators to irrigation, mining, marine, pumps, or small vehicle power.
  4. Factory conversion to LPG, as opposed to cheap converter kits commonly found in the market. A primary benefit of this procedure is seamless integration of the LPG kit into the engine’s ECU. Aftermarket conversion kits often do not integrate fully, voiding the warranty or rendering engine fault warnings incorrect. For this reason, aftermarket conversion kits, such as are currently being sold cannot be recommended for proper installation and life cycle. Furthermore, MarineDiesel engines have been designed specifically with alternate fuels taken into account. Though there are some immediate cost savings associated with aftermarket conversions, they simply are not an accurate substitution for a proper OEM design.
  5. Full MarineDiesel warranty terms apply.
  6. Government financing may be available. 

 

Life Cycle

General Motors has been manufacturing the Vortec block configured to LPG for nearly thirty years.

Thousands of units have been sold and the engine has proved to be extremely reliable.

The MTBO is at 10,000 hours of use, however, it is highly dependent on climate and continuous RPM.

 

Cost to Operate

The 5.7L LPG consumes fuel based on engine load.

100% Load:         9.3 m3 / hour

75% Load:            7.1 m3 / hour

50% Load:            5.4 m3 / hour

25% Load:            3.8 m3 / hour

 

<<COMPARE VS EQUIVALENT DIESEL>>

100% Load:         27 L / hour

75% Load:            20 L / hour

50% Load:            12 L / hour

25% Load:            8 L  / hour

 

Current prices of fuel (local converted to Euros):

LPG:   0.30 / litre

Diesel: 0.79 / litre

Average annual use of 4,400 hours per year, assuming 75% load at 1,800 RPM.

LPG consumption 3.85 Liters / m3

27.335 Liters LPG / Hour

LPG annual cost of fuel consumption: 33,075

Diesel annual fuel consumption: 65,978

Cost of ownership, year one

Diesel:

Cost of Engine:                                                  5,000

Operating Cost:                                                                65,978

Service and spares (oil filters, etc):          2,900

Total Cost Year One:                73,878

LPG:

Cost of Engine:                                                  7,250

Operating Cost:                                                                33,075

Service and Spares:                                         2,500

Total Cost Year One:                42,825

 

Payback Time: 3 months

 

Amount of Power Produced

This is a difficult question to answer, since it will vary greatly based on the alternator chosen. In order to keep everything consistent, the same Kohler alternator 4P10X, will be used. This same alternator is used by numerous other manufacturers to produce the same amount of electricity, using LPG, Diesel, or CNG.

This alternator will produce 52 kW of power at 110 / 220 50 hz, using the 5.7L engine.

To put this amount in context, 52 kW is roughly enough to power 20 medium to large window unit air conditioners, or a medium-sized restaurant.

Therefore, given the usage described above, using LPG,

One Hour: 4.37

One Day: 91.88

One Month: 2756

One Year: 33,075

Cost per kWH: 0.147

 

A diesel genset produced by Baifa, using a Deutz engine made in China, producing 48kW using the same alternator would cost to run continuously:

One Hour: 10.35

One Day: 124.15

One Month: 3,725

One Year: 44,696

Cost per kWH: 0.216

 

A similar diesel genset, produced by John Deere using a four cylinder, John Deere diesel engine and using, again, the same alternator,

One Hour: 26.93

One Day: 323

One Month: 9,690

One Year: 116,276

Cost per kWH: 0.518

 

Tank Capacities

For small home / commercial use, portable LPG tanks come in the following sizes: 4 kg, 7 kg, 15 kg, and 48 kg.

The standard size for tanks installed in vehicles (permanently mounted, even on trailers, for safety reasons) is 58L (30.39 kg).

For commercial or industrial use, particularly when the engines will be used to power continuously, rather than as standby, typically large, above ground or underground tanks are used. The most common sizes of above ground tank are 1T (1,908 L) and 4.3 T (8,204 L).

Which tank that should be used and how long the generator will provide power on a single tank are really highly dependent on how the genset will be used. The smaller LPG “cooking gas” cylinders will occasionally “freeze” due to the atmospheric pressure difference if too much is drawn from the tank. Therefore, the smaller 4kg and 7kg tanks should not be used with the 5.7L. Remember additionally, 100% of the tank volume will never be able to be removed, again due to pressure. Therefore, a factor of 15% is reduced for simple numbers on LPG.

 

5.7 L Vortec with 4P10X, 12 hours per day continuous RPM use (1,800 RPM)

Tank Size Diesel Equivalent Cubic Meters LPG Reduce 15% below Full on LPG (Usable Amount in tank) Time between Fill-ups LPG Time between Fill-ups Diesel
15kg (Cylinder) 28.6L 8.085 7.03 m3 59 minutes 1 hour, 20 minutes
48 kg (Cylinder) 91.6 L 25.872 22.5 m3 3 hours, 10 minutes 4 hours, 40 minutes
30.39 kg (Taxi standard) 58 L 16.38 14.24 m3 2 hours 2 hours, 50 minutes
73.36 kg (Trailer max) 140 L 43.5 37.83 m3 5 hours, 30 minutes 7 hours
1,000 kg (above ground) 1,908 L 539 468.7 m3 5.5 days 8 days
4,300 kg (above ground) 8,204 L 2,317.7 2,015.4 m3 23.5 days 34 days

 

Bespoke Engine Services

 

 

Bespoke engine services are certainly a specialty of MarineDiesel. We can design, build, and customize virtually any engine in virtually any application, marine or industrial. Of course, through our partnership with GM, we have a wide range of blocks and engine types to provide us a basis from which to start. Additionally, we have connections in the engine market to purchase a wide variety of engine blocks (sometimes even from competitors) to modify for specific customer applications.

Engineering is really our specialty. We have designed power solutions for many different applications, often where an “off the shelf” engine does not exist. Some examples of previous applications we have designed:

  1. UAVs
  2. USVs
  3. Tanks
  4. Submarines
  5. Alternative, or Dual Fuel
  6. Cranes
  7. Prototype Boats
  8. Prototype Automobiles
  9. Customized Gensets
  10. Trains
  11. Off Road Vehicles

Our dedicated engineering team in Sweden can customize just about any project.

Contact us today for more information.

 

 

 

 

Tight spaces and tighter places

 

 

MarineDiesel engines are the lightest, and most compact, of any engine on the market in our class. That is indisputable fact.

Why does this matter?

Quite simply, MarineDiesel engines can fit into tight places that simply do not have the space for our larger competitors. On boats, especially RHIBs or small high speed craft, this is a very important product feature. RHIBs, in particular often have tiny engine compartments located immediately under the deck, with little excess room. The vessel pictured above is a recreational vessel with three engines. Engines made by our competitors would not only never fit in the limited space, but their extra weight would shift the LCG of the vessel considerably.

With catamarans or trimarans, a different problem emerges. The beam on each hull. Port or starbord, engine compartments are narrow, with little extra room.

This can be an issue in industrial applications, too. Our MDPT subsidiary is currently involved in a re-powering project involving armored vehicles. These vehicles are designed with precisely zero excess space, and the smaller, lighter MDPT engines make a big difference in vehicle performance and ease of operation.

In fact, the biggest problem we face in these cramped quarters is providing adequate cooling for the engines, whether on land or at sea. Engines produce a lot of heat, and that heat must be dissipated. Through years of experience, MarineDiesel has learned practices and techniques that provide adequate cooling, such as louver design, blowers, and engine placement.

To illustrate, see the ventilation diagram below:

A - Air should exit the engine bay and the upper section B – Air should enter the engine bay at the lower section

A – Air should exit the engine bay and the upper section
B – Air should enter the engine bay at the lower section