IRJET- A Review on Design and Development of Modified Differential Gearbox

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1638
A Review on Design and Development of Modified Differential Gearbox
Mr. Nikhil Kishor Toke1, Mr. Girish C Kurkure2, Mr. Shubham S Waghumbare3,
Prof Avinash S Jejurkar4
1,2,3Student, Department of Mechanical Engineering, SVIT Nashik, Maharashtra, India
4Assistant Professor, Department of Mechanical Engineering, SVIT Nashik, Maharashtra, India
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Abstract:- The present study addresses the issues of the
differential at the time of different conditions and solutions of
every problem by changing its material, design and using
another system is done. In this paper the view of every
researcher is to improve efficiency by increasing its strength
decreasing its weight and by changing its structure either
chain differential or spur gear differential. This development
of differential improves its efficiency from cracking expired it
load acting on it
Key Words: design, development, chain differential,
efficiency, spur gear differential
1. INTRODUCTION
When the vehicle is moving on a road and when it takes a
turn both the outside and inside wheel need to travel
different distance so herethe differential gearboxcomesinto
role. The transmission system used in the vehicle contain a
component which is used to transfer power from propeller
shaft to both the wheels is called as differential. It is an
assembly of gear in an epicyclic train which permit the
rotation of two shaft at two different speed, used at the rear
side of the vehicle to rotate the wheel faster than the other.
The differential is used in two ways, one is that it receives an
input and creates two outputs whereas other is that It
receives two inputs combined it and gives one output. The
differential is located in between the two-rear wheel of the
vehicle to rotate one wheel faster than the other. When the
vehicle takes a turn, the inner wheel covers less distance
than the outer wheel, so it means the speed of inner wheel
has to be less than the outer wheel. But when the vehicle
goes straight both the wheel rotate at the same speed. To
provide both the condition differential gearbox is used.
When the vehicles one wheel is in mud, snow, slippery,
potholes or stucked to the obstacle the two problem is that
the wheel which is stucked rotates twice the normal speed
while the other wheel is stationary. This is due to the wheel
which is stucked does have enough traction force acting to
the road surface. To avoid this problem the development in
the gearbox is to be done and the solution to have
differential locking system which provide engagement or
disengagement. The design of the differential effect on the
failure of the differential. As it makes with the assembly of
the bevel gear it is good for taking load of the vehicle. So, the
enhance the overall differential and to avoid failure due to
loading. The design of such differential gear is given to this
paper. Some development of differential is to decrease a
weight of the differential by replacing bevel gear with spur
gear. So overall design and development to reduce the
limitations and to increase the efficiency of differential gear
is carried out in this paper.
1.1 LITERATURE REVIEW
Author Utkarsh Patil et al. [1] discussed in this paper the
transmission system of the vehicle but they mainly focused
on the different type of the differential gearboxes. As the
vehicle gets stucked in the potholes, mud, slippery road,
snow or the obstacle etc. the torque provided to the stucked
wheel is more and the vehicles tyre rotate on the same place
and does not move forward so to minimize thislimitationthe
authors discussed various modification in the differential
gearboxes such as helical gear driven differential,limitedslip
differential, clutch pack differential, cykro gear differential,
electronic controlled differential, belt driven differential,
locking differential by centrifugal force etc. this many
differentialsaredesignedforspecialpurposesoperationsand
these are unable to eliminateallthelimitationsso,wecanuse
the combination of it and eliminate the limitation and use in
the vehicle for our required operation.
The Author Harsha Bhandaru et al. [2] discussed about
the differential gearbox and gearbox to reduce the
transmission system using differential gear and he also
discussed about various transmission system such as gear
array, toroidal CVT, CVT, Lock differential instead of
differential.
This all type of differential gears are shown in below
figuress. He also discussed about the problems related to the
parking faced by the peopleinthemetropolitanareastosolve
this he discussed the design in which thewheeldirectlyturns
in 90° or we can say in longitudinal axis so that the parking
problem in the compact spaces is solved. He also discussed
the alternative transmission system components and smart
parking system is fabricated friction losses in the
transmission components can be reduced by using oil which
is used in CVT. The transmission component can be used in
the passenger car. The smart parking can be easily
implemented in cars.

Fig -1 Planetary Gear System
Fig -2 Toroidal Transmission
Fig -3 CVT Transmission
Fig -4 Lock Differential
Bridjesh P et al. [3] proposed that the design, modelling
and the structural analysis of chain differential. They found
the results using solidworks on the different materials. He
analysed the differential stub axle, sprocket and involute
bevel gear by aluminium alloy, plain carbon steel and grey
cast iron. They observe the stress, strain and displacement
value and concluded that the aluminium alloy is safe for
differential body, grey cast iron for sprocket and for the gear
steel is the safe material.
Chandrakant Singh et al. [4] gives the information about
vehicle differential system. When one wheel of the vehicle is
stucked in the snow or mud and does not have enough
traction i.e. stationary then the other wheel rotates twice its
normal speed, so he studied and gave the solution of it by
introducingdifferentiallockingsystemwhichissensorbased.
Sensor senses the difference in speed of the vehicles wheels
and locks the differential so that the wheels have same
traction. This mechanism produces a stabilization force
acting though the rear axle, that resist a vehicle rotation. In
this paper the differential is going to locked and the shifter
mechanism used to move dog ring engage both wheel shaft
with drive and equal power is given to the both.
The Author Silvia Medvecka-Benova et al. [5] discussed
and have done optimization of the differential heavy truck
without a wheelreduction.Theuniqueconstructionsconcept
solution has a heavy truck because the distribution of the
drive torque is placed in the central distribution tube, as
shown in Fig. 5 The modified differential gearbox consists of
the Axial axle, bevel pinion, Bevel gear, half axle, Drive shaft
of the rear axle, Ring gear, Internal ring gear etc as shown in
fig. 5 & fig. 6. the modified differential gearbox is cylindrical
type. By doing the analysis the author found that the result
that the original differential gearbox there was increased
stress with the value exceeding the yield strength of the
material gearbox in the place of the notch at the head of the
gearbox, so by modification of the differential gearbox the
value of the stress will be reduced at the notch by 34% and

this is adjusted gearbox is useful for larger load carrying
vehicles such as heavy trucks.
Fig -5 Distribution of the drive torque to the axles
Fig -6 The basic centre differential in the rear-axle tube
Joseph Gerald et al. [6] give the ideaaboutthelightweight
spur gear differential system by introducing a spur gear at
half shaft of the vehicle which transmit the power to the
wheel. The carrier is mounted on the propeller shafts which
rotates the pinion in opposite direction. This pinion is
connected to the half shaft of the vehicle which rotate in the
same direction as propeller shaft. These differential claims
30% lighter than the bevel spur differential and 70% free
space available because of its slim design for this reason it
increases efficiency and reducing the cost compared with
others conventional differential. This is used for light duty
and commercial vehicles.
Gregory Antoni et al. [7] discussed in thus paper about
various mechanical losses in differential gearbox. In
differential gearbox friction losses is the major problem it
damages the surface of the gear tooth. The friction loss is
developed because of the lack of lubrication between
mechanical element or by defect in the gear design. He
discussed on the friction losses occurred using various
relationship graphs. In order to test the influence of these
parameters and determine the ability of modeltopredictany
mechanical losses asensitivity analysis was conducted using
numerical approach and experimental study he calculated
realistic values for some parameters.
The Author Amir Khan et al. [8] discussed about the four-
wheel drive. It cannot work without centraldifferential.They
studied the phenomenon of windup which is there in small
difference in between front and rear wheel produce extra
torque applied across the transmission. This case studyisfor
Maruti Suzuki Zypsy. It transfers torque ratio 50:50 for front
and rear axle but the torque develop by engine should ratio
60:40 which is ideal ratio for better handling. So, it need to
replace gearbox to modified central differential having two
different side gears. FEM method is used for analysis and
creo-2 is used for calculating design. They concluded that
modified central differential is better is better than transfer
gearbox.
C Veeranjaneyulu et al. [9] discussed and studied on the
on the design and analysis of differential gearbox. They
analyse using different material such as cast iron, cast steel
and aluminium alloy. The design is done with help of the
cosmos software which is used forthe finiteelement method
to stimulate the working condition of design of design and it
also predict the behaviour ofthe material.Fromthispaperhe
concluded that aluminium alloy has the stress value within
the permissible limit. So aluminium alloy is safe for
differential gearbox. After comparing stress value for speed,
they concluded that the value of permissible stress of
aluminium alloy is less than the other material. They also
observed the frequency analysis of the material. The
vibrations are less in the aluminium alloy rather than the
other cast iron and cast steel.Theyconcludedthataluminium
alloy has three times reduction in weight than other two
material which increases the mechanical efficiency of the
differential so aluminium alloy is the bestmaterialusedforit.
Nitin Kapoor et al. [10] design and developed a model of
differential gearbox with a material of glass filled polyamide
composite material by using CATIA-V5 under the different
speed and static loading condition. The stress and strains
result of glass filled polyamide composite and metallic
materials. glass filled polyamide have the better tensile
strength, recyclability, low density, high creep resistance
fatigue strength, low von-misses stress, less friction and low
cost. by relating composite material different gearbox with
conventional it is found to be stress and strains are lower for
the composite material which increases mechanical
efficiency.
G. Shrikant Reddy et al. [11] designed and analyzed the
gear assembly in the differential gearbox. the problem of the
failure at the contact regions minimized by modifying gear
material in static and dynamic condition. This modification
was done by using stresses and displacement at the pointthe
material used by them areNi-Crsteelandsteelandcompared
it in the ANSYS workbench. So, they got that Ni-Cr steel is the
best material in differentialgearboxmanufacturingasitgives

high strength also the material Ni-Cr has long life compared
to steel.
1.2 MATERIALS & METHODS
Design is trailed by researcher by usingsoftware’ssuchas
CATIA-V5, Solidworks, Creo-2, MATLAB, Ansys. The design
and analysis were done on different materials like
aluminium alloy, cast iron and cast steel, grey castiron,glass
filled polyamide using these software’s and by analytical
method they found some final results. Development was
done using spur gear in the place of bevel gear, chain and
sprocket, different modification in differential gearbox,
transmission system, different steering mechanism and
sensors instead of ordinary differential gearbox.
2. DISCUSSION
The material used for body of differential gearbox should be
aluminium alloy as it reduces the weight and the gear should
be madeup ofsteel due to itsstrength. In the development of
modified differential gearbox different system can be used.
Till now the differential used to take one input and two
outputs but by modifying and adding one extra bevel gear
adjustment on crown wheel we can take one input and three
outputs. And by analyzing using different materials we can
modify differential gearbox having three outputs. Also, there
are various special purpose differential gearbox but
individually they cannot overcome all the limitations so we
can use the combinationsofthesespecialpurposedifferential
gearboxes and reduce the limitations to some extent.
3. CONCLUSIONS
i. Use aluminium alloy forbodyofdifferential gearbox
as it has low weight and high permissible strain,
stress values as compared to other materials.
ii. Use spur gear differential insteadofbevel gearsasit
is 30 % lighter than the bevel differential as it
reduces the cost and increases the efficiency. It also
releases the space upto 70% as it makes the
differential slim. Due to this the Go Green conceptis
implemented.
iii. The use of composite materials like glass filled
polyamide having better tensile strength,
recyclability, less friction and low cost increases its
mechanical efficiency.
iv. Using combination of various special purpose
differential gearbox, sensors and different steering
mechanism the day to day parking problems can
also be solved
REFERENCES
[1] Utkarsh Patil, Vishal J. Savant, Rohit S. Bharamgonda,
Prof. P. N. Gore, “Recent Advances in differential drive
system for Automobile Propulsion”, International
Research Journal ofEngineeringandTechnology(IRJET)
Volume 05 Issue 05 May 2018.
[2] Sree Harsha Bandaru,“AlternativeTransmissionSystem
For 4-Wheeler” International Journal of Mechanical
Engineering and Robotic Research”, ISSN 2278 – 0149
Vol. 4, No. 1, January 2015.
[3] Bridjesh P, Vinayak J, Teja N and Madhu S, “Design of
Chain Differential for a Race Car”, International Journal
of ChemTech Research, CODEN (USA): IJCRGG, ISSN:
0974-4290, ISSN(Online):2455-9555 Vol.10 No.3, pp
225-228, 2017.
[4] Chandrakant Singh, Lalit Kumar, Bhumesh Kumar
dewangan, Prakash Kumar sen, Shailendra Kumar
bohidar, “A Study on Vehicle Differential System”,
International Journal of Scientific Research and
management, Volume2 Pages 1680-1683ISSN(e):2321-
3418, 2014.
[5] Silvia Medvecka-Benova, Frantisek Trebuna, Peter
Frankovsky, “Modification of the Centre Differential
Gearbox”, American Journal of Mechanical Engineering,
Vol. 3, No. 6,2015, pp 240-243.
[6] Joseph Gerald. M, Kannan. C, Karthick. B, Rajesh. C,
“Design and Fabrication of Spur Gear Differential”,
International Conference in Magna on Emerging
Engineering Trends 2015,IJIRSET, Volume 4, Special
Issue 2, February 2015,ISSN (Online) : 2319 – 8753
ISSN: 2347 - 6710
[7] Gregory Antoni, “On the Mechanical Friction Losses
Occurring in Automotive Differential Gear boxes e”, The
Scientific World Journal Volume 2014, Article ID
523281.
[8] Amir Khan, Sankalp Verma, “Design and Analysis of
Automobile Central Differential Having Two Different
Side Gear”, IJSRD - International Journal for Scientific
Research & Development| Vol. 3, Issue 04, 2015 | ISSN
(online): 2321-0613.
[9] C. Veeranjaneyulu and U. Hari Babu., “Design and
Structural Analysis of Differential Gear Box at Different
Loads”,IJAERS/Vol.I/IssueII/January-March,2012/65-
69.
[10] Nitin Kapoor, Virender Upneja, Ram Bhool and Puneet
Katyal, “Design and Stress Strain Analysis of Composite
Differential Gear Box”, International Journal of Science,
Engineering and Technology Research(IJSETR),Volume
3, Issue 7, July 2014.
[11] G. Srikanth Reddy and M. Promod Reddy,“Evaluationon
Failure of an Automobile Differential Gear Box”,
International Journal of Latest Trends in Engineering
and Technology, Vol. (8) Issue (3), pp.075-083, e-
ISSN:2278-621X.

AUTHOR
Nikhil Kishor Toke.
Mechanical Engineer.
SVIT, Nashik
Girish Chandrakant Kurkure.
Mechanical Engineer,
SVIT, Nashik
Shubham Sadashiv Waghumbare.
Mechanical Engineer.
SVIT, Nashik

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