10-11-2012, 03:58 PM
ELECTRO MAGNETIC CLUCH
ELECTRO MAGNETIC CLUCH.pdf (Size: 1.8 MB / Downloads: 39)
ABSTACT:
A clutch is a device used to make and brake contact from the transmission. When it engages,
then power is transferred from engine to gear box and when it disengage, power flow is stop,
hence it is called free running of engine. There is an innovation done in automobile industry,
called electro magnetic clutch, which is recently used by Renault Car Company, which uses the
basic principle of electrical energy as well as magnetic forces.
This project revels the manufacturing of electro magnetic clutch. In place of Engine, shaft is
directly attached to variance (variable motor) and clutch disc as well as pressure plate is used, in
between them friction material called “Asbestos” used to grip between the pressure plate and
clutch plate. This project shows, experimental analysis of Electro magnetic clutch, and at last at
which speed clutch engage as well as disengage is measured and when clutch disengage, at that
time speed of flywheel is also measured.
ORGINAL VIEW OF PROJECT:
(Figure 1-layout of project)
1
PROJECT REPORT ON ELECTRO MAGNETIC CLUCH
INTRODUCTION:
Definition of clutch:
The clutch is an important part in the transmission system of automobiles. It transmits
power from the engine to gear box at various speeds. No shock is caused during this
transmission of power.
Purpose:
The function of the clutch is to temporarily disconnect the engine from the gear box unit.
When the gear has to be changed from the first to the second ,it should be done after
disconnecting the engine from the gear box. If this is not done ,the gear teeth might
break. The clutch is thus helpful when starting, shifting gears and idling.
Principle of operation:
The clutch works on the principles of friction. When two friction surfaces are brought in
contact with each other and pressed they are united due to the friction between them. If
now one is resolved, the other will also revolve. The friction between the two surfaces
depends upon the area of the surfaces, pressure applied upon them and co-efficient of
friction of the surface materials. The two surfaces can be separated and brought into
contact when required. The driving member is kept rotating. When the driven member is
brought in contact with the driving member, it also starts rotating. When the driven
member is separated from the driving member it does not revolve. This is the principle on
which a clutch operates.
Requirement of a clutch:
1. Torque transmission: - The clutch should be able to transmit maximum torque of
the engine.
2. Gradual engagement:- The clutch should engage gradually to avoid sudden jerks.
3. Heat dissipation: - The clutch should be able to dissipate large amount of heat which
is generated during the clutch operation due to friction.
4. Dynamic balancing:- The clutch should be dynamically balanced. This is
particularly required in the case of high speed engine clutches.
PROJECT REPORT ON ELECTRO MAGNETIC CLUCH
5. Vibrating damping: - The clutch should have suitable mechanism to damp
vibrations and to eliminate noise produced during the power transmission.
6. Size:- The clutch should be as small as possible in size so that it will occupy
minimum space.
7. Free pedal play: - The clutch should have free pedal play in order to reduce effective
clamping load on the carbon thrust bearing and wear on it.
8. Easy in operation: - The clutch should be easy to operate requiring as little exertion
as possible on the part of the driver.
9. Lightness:- The driven member of the clutch should be made as light as possible so
that it will not continue to rotate for any length of time after the clutch has been
disengaged.