Pramana Research Journal ISSN NO: 2249-2976
A REVIEW ON DYNAMOMETER
1
Sourav Roy,2Shyamji Agnihotri and 3Harsimran Singh Sodhi
1,2
B.E, student, Mech. Engg. Department, Chandigarh University, Mohali, India
3
Assistant Professor, Department of Mechanical Engineering Department
Abstract
In this review of dynamometer, we will discuss about what dynamometer is,
history of dynamometer, principle, function and applications of dynamometer,
types of dynamometer, invention of dynamometer. We will discuss the principle
and working behind the simple basic dynamometer to the advanced dynamometer
with the help of a diagram. We will discuss the applications of Chassis
Dynanometer and Engine Dynamometer and how they work and why we use them
in automotive industries.
Keywords: principle, torque, speed, hydraulic, shaft, working, study, brakes,
types, testing, advancements, heat, machine.
Introduction
Dynamometer is a device for measuring torque, speed or braking power of a
rotating machine or engine. Dynamometers are basically designed for both power
absorption and power transmission. Some dynamometer absorbs power and
release or dissipated them in the form of heat and some helps power transmission
which is helpful in measuring torque of rotational machine. The first dynamometer
was built by French rifle maker and engineer Edme Reigner in 1798 and hence
known as Reigner dynamometer. From then, dynamometers are use and various
types of dynamometer are made to perform various functions like chassis
dynamometer is used for complete vehicle testing, hydraulic dynamometer, AC
and DC dynamometer etc.
Invention of Dynamometer proved very useful to the automotive and
mechanical industries. Dynamometers are used for the study and testing of load
variations in turbines, solar power plants, wind mills, damps for different wind
variations, solar energy extraction, generation of electricity at higher rate.
Automotive industries use dynamometers for testing the automotive motors and
engine and enhance their performance and durability to set new standard
benchmark in the field of Automobiles. Engine dynamometers are used for
checking the breaking system, verify engine operation at the given standard rates
and performance and diagnosing engine power loss, vibration etc.
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Pramana Research Journal ISSN NO: 2249-2976
Principle & Working
The principle of working of a basic dynamometer is that they turn the rotating
force or torque into an electrical signal which can be easily amplified and
converted and displayed with the help of a transducer,strain guage and display
screen. Some dynanometer use electric motors as motor testers connected with
wires supplying current which are connected to voltmeter,ammeter and ohmmeter
for display of reading. Advanced Dynamometers used sensors that can sense the
speed of the rotating shaft and calculate their torque by number of rotations the
shaft is making per minute.
figure 1. Diagram of dynanometer
Chassis & engine dynamometer
Chassis Dynanometer and Engine Dynamometer is the two most commonly used
dynamometer in automobile industries and for vehicle testing. chassis
Dynamometer use advanced computerised method basically the one with sensors
to calculate the wheel rotational angle to determine engine or motor torque.
ChassisDynamometer ensures optical performance with heavy-duty vehicles and
with high horse power engines used in supercars or formula cars for race.
Whereas, Engine dynamometers uses more conventional way to take
measurements from the engine to any other system present.The result or
measurement produced by the Engine dynamometersare highly accurate. They are
quite famous among engine rebuilders,automobiles manufacturer and companies
that produces high performance vehicle. Engine dynamometer drive productivity
and ensure total system check-up which delivers the best overall value for
performance, validations, diagnostics and engine break-ins. Every dynamometer
has different functions, but some components orunits of all dynamometers remains
the same- an absorption unit, section for developing or producing torque(basically
Volume 8, Issue 8, 2018 496 https://pramanaresearch.org/
Pramana Research Journal ISSN NO: 2249-2976
done by friction, electromagnetic power or hydraulic fluid) and a measuring
device to calculate torque or speed which uses sensors connected with a display
showing measurements or readings.
Conclusion
Dynamometers are of great benefit to the manufacturer of automobiles engine or
vehicles. they help to determine the power of their newly produced engines and
motor before they release them in the market for commercial purposes.They help
manufacturer to repeatedly go through the system of the vehicles which may have
issues and identify the problems which may be like faulty brakes, excessive wheel
rotation, low acceleration of the engine and ultimately help them to take care of all
these things and improve their engine based on their industrial standards.By the
passage of time, Dynamometers are becoming more advanced which reduces the
error rate and we can build a more efficient machine or engine with more improve
safety, power and performance of engines or motors.
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