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Marine Jet Advantages

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					For Watercraft that work like your Car,
   You need Intelligent propulsion.
            Jeff Jordan, President
            IntelliJet Marine, Inc.
                  Supported by
           Art Anderson Associates
                               What If . . .
             What if your car had only one gear?

            It would work like a Model “T” . . .
                                                    . . . Or   like a
             boat.

            You couldn’t change gears to operate more efficiently
             at different speeds or when you had a greater load.

            You couldn’t use a computer to shift gears to minimize
             fuel consumption at your current speed and load.

2 Jun 08                                                                2
                           Now . . .
           imagine a boat that works like your car.

                    Where a computer controls the motor
                             and the transmission,
                   so the system operates at peak efficiency
                              over wide ranges of
                         acceleration, speed, and load.

             This is what IntelliJET provides,
                                          and more . . . . .
2 Jun 08                                                       3
           This Presentation will show you


            What the benefits of IntelliJet are
            Why IntelliJet works
            How IntelliJet works
            How IntelliJet provides its benefits

2 Jun 08                                            4
           What the Benefits of IntelliJet Are
            Very high fuel efficiency
            Both high-speed and heavy-load capable
            Maneuverable at all speeds and conditions
            Size and weight savings
            High reliability and maintainability
            Safe operations
            Shallow draft capability
            Stealth characteristics

2 Jun 08                                                 5
           Why IntelliJet Works




2 Jun 08                          6
                           Formula Discussion
       • Thrust force is proportional to the dynamic power of the jet divided by
         the velocity of the jet.
       • To double the force, you can either double the power or reduce the
         velocity by 50%.
       • Marine propulsion has traditionally relied on a bigger motor.
       • IntelliJet concentrates on reducing the velocity, and it is in good
         company.
       • Reducing the velocity has been a winning strategy for the increasingly
         high-bypass turbofans on Boeing’s airplanes. The higher the bypass
         ratio, the lower the velocity of the jet, the lower the noise, and the lower
         the fuel consumption.
       • Modern jet fighters commonly use variable bypass turbojets and
         variable nozzles to reduce the jet velocity.
       • Even NASA’s rockets employ convergent/divergent nozzles to reduce
         velocity and maximize thrust.



2 Jun 08                                                                            7
              Why IntelliJet Works
                 Design Objectives

            Operate the motor efficiently
            Maintain pump efficiency
            Maintain inlet efficiency
            Minimize jet velocity



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           How IntelliJet Works
              Design Features

           Variable-pitch spherical pump
           Variable nozzle
           Variable inlet
           Microcontroller
           Minimizes jet velocity.

2 Jun 08                                   9
           How IntelliJet Works




2 Jun 08                          10
                      How IntelliJet Works
                 Variable-pitch Propeller Pump

            Continuously Variable Power Transmission
            Reduces velocity up to 50% - doubles thrust
            Quick, smooth shifting forward/neutral/reverse
            Eliminates need for reversing “bucket”


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           How IntelliJet Works




2 Jun 08                          12
           How IntelliJet Works




2 Jun 08                          13
           How IntelliJet Works




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                     How IntelliJet Works
            Variable Rectangular Steering Nozzle

            Computer maintains efficient pump operation
             by adjusting nozzle area.
            Provides steering in both forward and reverse.
            Allows elimination of reversing bucket.



2 Jun 08                                                      15
           How IntelliJet Works




2 Jun 08                          16
           How IntelliJet Provides Its Benefits
           Both High Speed and Heavy Load Efficiency




2 Jun 08                                               17
                        Explanation of Graph
       • The previous graph illustrates the selection of a
         conventional marine jet to meet boat speed requirements in
         a given application. The selected “Conventional Jet
         Thrust” curve is adequate to the speed requirements. This
         curve is approximate to the full power of the motor and is
         the only line on which the conventional jet system operates
         the motor efficiently with its one gear.
       • The propulsion system is actually required to operate
         anywhere in the cross hatched area. Running the
         conventional jet in the lower part of the area is like driving
         your car down the highway in second gear.
       • The IntelliJet operates efficiently over the whole hatched
         area by minimizing motor rpm, just like a continuously
         variable transmission in a Toyota Prius or Ford Taurus. In
         minimizing rpm it also minimizes jet velocity to achieve
         the highest possible thrust from any give power input.
2 Jun 08                                                                  18
             How IntelliJet Provides Its Benefits
           Both High-speed and Heavy-load Efficiency
       The embedded microcontroller program regulates:

            The pump to maintain motor efficiency and low velocity.
            The nozzle to maintain pump efficiency.
            The inlet to maintain recovery efficiency.

       So the total system operates at peak efficiency
           at all speeds and under all loads and accelerations.

2 Jun 08                                                         19
             How IntelliJet Provides Its Benefits
           Both High-speed and Heavy-load Efficiency
                Motor efficiency increased 20% +/-
                Exhaust emissions minimized
                Twice as much thrust for any given motor power
                Fuel consumption vs. fixed-vane pump
                    Up to 20% reduction in motor fuel consumption
                    50% reduction in power demand by reduced velocity
                    Up to 60% reduction in fuel consumption
                Advantage reduced with higher boat speed
2 Jun 08                                                                 20
           How IntelliJet Provides Its Benefits
                    Size and Weight Savings

           Larger diameter pump, yet smaller envelope
           without a reversing bucket
           Inlet molded or welded into hull
            Eliminates casting and machining of massive inlet duct
            Thrust bearing in stator behind propeller
            Regular inboard motor mounting


2 Jun 08                                                          21
               How IntelliJet Provides Its Benefits
                High Maneuverability at All Speeds

              Familiar single-handle control or any other
              Shift quickly without reducing RPM
              Quick steering response
              Multiple program selection – set it & forget it modes
                  Maximum performance when detection is unavoidable
                  Suppress Cavitation Noise when avoiding detection
                  Maximum fuel economy for cruising

2 Jun 08                                                               22
           How IntelliJet Provides its Benefits




2 Jun 08                                          23
           How IntelliJet Provides Its Benefits
           High Reliability and Maintainability

              Out of harm’s way, like a conventional jet
              Bearings immersed in pressurized oil
              Radial labyrinth around mechanical oil seal
              Crowned splines vs. U-joints on shaft
              Mechanical water seal vs. packing gland
              Modular pump units quickly exchanged

2 Jun 08                                                     24
           How IntelliJet Provides Its Benefits




2 Jun 08                                          25
           How IntelliJet Provides Its Benefits

                  Safe Operations
                     Enclosed Propeller
                     No Reversing Bucket
                     Nothing protrudes below the hull
                     No Pinch points
                  Shallow Draft



2 Jun 08                                                 26
           How IntelliJet Provides Its Benefits
                    Stealth Characteristics

            Cavitation suppressed at operating speeds
            Jet velocity is low relative to the wake
                 No rooster tail
                 Reduced wake luminescence
                 Reduced noise



2 Jun 08                                                 27
           For Watercraft that work like your Car,
              You need Intelligent propulsion.
           IntelliJet is the Intelligent Propulsion that Provides:

                     Very high fuel efficiency
                     Both high-speed and heavy-load capability
                     Maneuverability at all speeds and conditions
                     Size and weight savings
                     High reliability and maintainability
                     Safe Operations
                     Shallow draft capability
                     Stealth characteristics

2 Jun 08                                                             28
 Jeff Jordan, President
 Intellijet Marine, Inc.
     www.iiJet.com

       Supported by
Art Anderson Associates

				
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posted:5/11/2011
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