Motorcycle Dynamometer

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Motorcycle Dynamometer

• Group members
• Ariff farhan Ibrahim (0512653)
• Mohd hazwan MohdHasali(0511947)
• Mohd Asyraf Hafizi Mohd Abidin(0438037)

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Introduction

• A dynamometer, "dyno","dyn'r" or "pump" for
  short, is a machine used to measure torque and
  rotational speed (rpm) from which power produced
  by an engine, motor or other rotating prime mover
  can be calculated.
• A dynamometer can also be used to determine the
  torque and power required to operate a driven
  machine such as a pump.

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• In addition to being used to determine the torque
  or power characteristics of a machine under test
  (MUT), Dynamometers are employed in a number of
  other roles
• beyond simple power and torque measurements,
  dynamometers can be used as part of a testbed for
  a variety of engine development activities such
  as the calibration of engine management
  controllers, detailed investigations into
  combustion behavior and tribology.

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Types Of The dynamometer(dynojet)

• MODEL 200i
• Through the use of state-of-the-art computer
  technology, Dynojet's MODEL 200i Dynamometer
  allows you to quickly and accurately diagnose
  performance problems. By simulating the best
  "seat-of-your-pants" road testing right in the
  shop, problems are easily diagnosed in a fraction
  of the time. Shop sales, service work, and
  credibility all benefit with a Dynojet Chassis
  Dynamometer.

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MODEL 250i

• The MODEL 250i Load Control Dynamometer is
  perfect for engine break-in, durability testing
  and fuel injection mapping. It's like getting two
  Dyno's in one package as all the features of the
  Dynojet Inertia Dynamometer are maintained.

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Dynamometer hardwares

• AIR/FUEL RATIO SYSTEM
• With the addition of the new Wideband air/fuel
  ratio module, every dyno run can show you not
  only horsepower and torque, but also exact
  air/fuel ratio. This takes the guesswork out of
  fueling adjustments. The air/fuel ratio graph
  shows a rich/lean condition at each RPM range
  during the dyno run.Retrofittable to any
  existing Model 200 dynamometer, as well as any
  upgraded Model 100 or 150 dyno utilizing the new
  hardware upgrade and WinPEP software.

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ATMOSPHERIC SENSING MODULE

• The Atmospheric Sensing Module measures absolute
  pressure, air temperature, and relative humidity.
  These measurements are used by the WinPEP
  dynamometer software to correct power and torque
  measurements to standard atmospheric conditions
  according to an SAE, DIN, or EEC formula.

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RPM MODULE

• The RPM Module receives and processes signals
  from up to 2 inductive pickups for measurement of
  engine RPM. Each input has an automatic gain
  circuit to compensate for a wide variance of
  ignition systems.

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DYNAMOMETER I/O MODULE

• The Dynamometer Input/Output Module sends and
  receives data from the dynamometer and the
  handheld pendant. The module also contains a
  buzzer and light which are activated when either
  the tire or dynamometer speed limit is approached

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The Rototest Dynamometer

• Rototests dynamometers have repeatedly pushed
  the boundaries of what to expect from chassis
  dynamometers. The Rototest dynamometer has over
  the years helped auto manufacturers, research
  organisations, OEMs, tier-one suppliers, race
  teams, performance specialists and numerous
  others - to increase the quality of their
  products, make their cars win more races and to
  perform at a higher level.

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Design Of The motorcycle Dynamometer

• Description of dynamometer
• Dynamometer consists on a metallic structure in
  which the bikes are placed through a ramp. Bike
  is tied to the dynamometer by the front wheel
  through a clamp that can be moved ahead and back
  with the purpose of fitting the position of the
  back wheel. This wheel is placed over a solid
  roller of steel that is fixed on the structure
  with two bearings.

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• Design of the roller
• The roller acomplises a double mission, on the
  one hand it receive the power that provides the
  wheel to him and by another one it absorbs and it
  stores this energy in form of angular velocity,
  is to say acts of inertial wheel.
• The characteristics that must have an optimal
  roller are
• inertia must be maximum.
• roller RPM at the end of the test must be
  maximum.
• The roller is a drum with serious inertia, thus
  is better to build a roller of great diameter and
  with mass moved away of the axis, nevertheless,
  due to wheel is directly tractioning on the
  roller, the angular velocity of the roller is a
  function of the diameter, if diameter is smaller
  then angular velocity is greater.
• As can be deduced, that the two characteristics
  that we had marked ourselves are opposed and is
  necessary to reach a commitment solution.
• As we needed that the roller rolls very fast is
  evident that the tests must be made in last gear.
  Nevertheless the roller does not have to roll
  faster of 5000 rpm. by mechanical limitations,
  therefore the commitment solution is a diameter
  to which one bike never surpasses the 5000 rpm in
  last gear.

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• Under this criterion the following table has been
  made.

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• Dynamometer Plans
• The plans that contain a dyno with the basic
  elements so that it works, consists of a metallic
  frame of square tube of 60 x 60 mm that leans in
  the ground with rubber feet. The piece that holds
  the front wheel slides on two parallel bars and
  must have a system of blockade to fix it to a
  position. The roller is of massive iron of 325 mm
  of diameter reason why you will be able to try
  without problems any bike. This roller is due to
  make in a single mooring between points so that
  it is not necessary to balance it. Its central
  band this knurled so that tractioning the wheel.

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• Installation of sensors
• The main sensor that should be mounted on the
  dynamometer is the pickup to measure roller
  speed, and then torque and horsepower. This
  sensor generates an impulse whenever it passes a
  ferromagnetic body in front of its zone of
  sensitivity. We will can make a single mark per
  rev. by drilling the roller in one side.
• Also, a toothed gear from a starter engine can be
  mounted to generate a pulse train.

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• Data acquisition and Software
• Once we have the finished mechanical part we
  needed to acquire data and to process them to
  obtain the curves. For it we will use SmartPower
  SP-1.
• Final job is to test the motorcycle dynamometer
  on track.

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Conclusion

• In conclusion, the dynamometer is the machine
  that has been used to measure the speed, torque
  and power of the vehicles precisely. Thus, this
  machine is very practical to determine the
  performance and stabilized the engine of the
  vehicle especially the motorcycle.
• The End