Automatic Differential Unit Locking System 4f2h3m

AUTOMATIC DIFFERENTIAL UNIT LOCKING SYSTEM GUIDED by

P. KALIDAS B.E., LECTURER DONE by A.MUTHUKRISHANAN (10212499) M.MANIVANNAN (10212493) S. KISHOREKUMAR (10212485) P. MANIKANDAN (10212491) C. MUTHUKRISHNAN (10212498) P. NILAGANDAN (28223426)

INTRODUCTION  A differential is a device which is used in vehicles over a few decades and when a vehicle is negotiating a turn, the outside wheel travels a greater distance and turns faster than the inside wheel.  The differential is the device transmitting the power to each wheel, allows one wheel to turn faster than the other.  It splits the engine torque two ways, allowing each output to spin at a different speed.  The differential is found on all modern cars and trucks, and also in many all-wheel-drive (full-time four-wheel-drive) vehicles.

 These all-wheel-drive vehicles need a differential between each set of drive wheels, and they need one between the front and the back wheels as well, because the front wheels travel a different distance through a turn than the rear wheels.  Part-time four-wheel-drive systems don't have a differential between the front and rear wheels; instead, they are locked together so that the front and rear wheels have to turn at the same average speed.  The is why these vehicles are hard to turn on concrete when the four-wheel-drive system is engaged.  There are some drawbacks in the existing mechanism and we overcome it in the proposed project.

   Then when a heavy truck is struck in a pit or mud it is very difficult to recover the truck as the differential unit cuts the power which is to be transmitted to the wheel struck.  So in this project the unit is disengaged and power is directly given to the axle and so the recovery is made easier.  This is even made use in the vehicle to be driven in the dense forests and even in dessert.

OBJECTIVE The Manual force is required to locking the differential unit This pneumatic system is also working with the help of air tank Time Less consumption is less and noise are less More efficient system and simple in construction

ABSTRACT  The proposed mechanism is to lock the differential.  By locking the differential the differential is disengaged from the axle.  Thus the power is directly transmitted to the axle and hence to the wheels.  This will considerably reduce the power loss in some occasions when unwanted loss is happening due to the transmission if power from the shaft to the differential

 So in mechanism the unwanted power loss in the due course of transmission through the differential is reduced.  There are some drawbacks in the existing mechanism and we overcome it in the proposed project.  The first is while climbing in steep hills the differential is not really needed as the speed of the vehicle is low.  And also there are some transmission loses in the differential. So at this time the unit is locked and the loss is overcome.

DEFINITION OF PROBLEM

 There are some drawbacks in the existing mechanism and we overcome it in the proposed project.  The first is while climbing in steep hills the differential is not really needed as the speed of the vehicle is low.  And also there are some transmission loses in the differential. So at this time the unit is locked and the loss is overcome

SCHEMATIC DIAGRAM FOR AUTOMATIC DIFFERENTIAL UNIT LOCKING SYSTEM

METHODOLOGY (WORKING PRINCIPLE)  In this method , the main purpose of this project is to lock the differential or to disengage the differential at the time when it is needed to be  so to lock the differential we needed to connects to shafts on the either side so that the differential has no effect on the axle 

Now to connect the two shaft we use two circular plates on the either sides of the differential.

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Both are in such a way that they get mated as soon as possible even in their rotation.

 So when the pneumatic valve is actuated then one of the plates is pushed to the other so that the plates get mated and hence the shafts are connected.

 So thus the differential is disengaged. To engage the differential again a spring is used to push the plates apart.

DETAILS OF PARTS       

Differential unit Double acting cylinder. 5/2 DCV. Solenoid valve. Liver mechanism. Flow control valve. Compressor.

DIFFERENTIAL UNIT

The vehicle travels in a straight line , the two rear wheel turn on the road exactly at the same speed  But when the vehicle takes a turn, the outer wheel travels on a longer radius than the inner wheel It will cause rapid tyer wear, steering difficulties and poor road handling this can be avoided by a mechanism called differential. 

DOUBLE ACTING CYLINDER

In double acting cylinder, no return spring is used. Air pressure is applied to each side of the piston.

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 The pressure difference between the sides results in the movement of the piston.  A pneumatic circuit for the direct control of a double acting cylinder. 5/2 DCV;

 Direction control valves are used to control the direction of flow in a pneumatic circuit.  They are used to start, stop and regulate the direction

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of air and help distribution of air in the desired line. It has five ways and two positions.

FLOW CONTROL VALVE

 It is used for control the flow of air.  Also it allows some amount of air to the cylinder.

COMPRESSOR

 It is used for compress the air that enters form the atmosphere.  In our project we uses two hours power compressor.

WORK DONE NOV

DEC

JAN

FEB

WEEK Select the title 1

Collection of Material Details

Assemble

Transport

WEEK 2

Project Deg

Collection of Material Details

Assemble

Preparing Report

WEEK 3

Project Purchasing the Deg Material

Assemble

WEEK 4

Project Purchasing the Deg Material

Assemble

Preparing Report Report Completion

SPECIFICATION OF THE FITTING:  Body Material  Fluid Used  Max. Operating Pressure  Pneumatic cylinder 30mm  Wheel alloy

Iron Air - 10 Bar -

COST ESTIMATION    stand frame ----------- Double acting cylinder ----------- solenoid Switch, Screws ----------- VALVE CONNECTORS ----------- Differential unit ----------- Transportation Charge -----------------------9400.00 --------------

1500.00 1700.00 1300.00 300.00 3000.00 600.00