Motorcycle
Dynamometer
Group members:
Ariff farhan Ibrahim (0512653)
Mohd hazwan
MohdHasali(0511947)
Mohd Asyraf Hafizi Mohd
Abidin(0438037)
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.
 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.
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.
MODEL 250i

The MODEL 250i Load Control
Dynamometer is perfect for engine breakin, 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.
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.
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.
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.
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
The Rototest Dynamometer

Rototest’s 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.
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.

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.
 Under
this criterion the following table has
been made.


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.
 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.
 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.
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……