Ezeifeka department of mechanical engineering, university of port harcourt, p. I simplified it greatly as there may be more than 2. In this article, youll learn why your car needs a differential, how it works and what its shortcomings are. Pdf on apr 22, 2007, nilton raposo and others published design of the differential unit for the 20062007 pace vehicle find, read and cite. If youve read how car engines work, you understand how a car s power is generated. By m kautam prasanto815121 s rajiv kumar0815140 sai prashant k 0815146 differential a differential is a device, usually employing gears it is capable of transmitting torque and rotation through three shafts. In this chapter you will learn the fundamentals of operation and upkeep of the drive lines, differentials, drive axles, and power takeoffs. Here you can download the free lecture notes of automobile engineering pdf notes ae notes pdf latest study materials with multiple file links to download.
The basic parts of a differential is introduced first. Thus, a locking mechanism, or limited slip differential allows one wheel to slip or spin freely while some torque is delivered to the other wheel hopefully on dry land. Procedure involved in disassembly of differential unit is also. The evolution of these electronics has been so rapid that a book automotive fundamentals. The differential assembly can be removed from the axle housing as a unit. To prevent skidding in a curve the wheel on the outside of the curve has to turn faster than the wheel on the inside because it has to travel a greater distance in the same amount of time as the inner wheel. Requirement transfers power from driveshaft to the wheels provides final gear reduction splits amount of torque going to each wheel allow the. A relatively new technology is the electronically controlled active differential. A history of the automobile and its component parts.
The differential is a component in all cars and is designed to compensate for the difference in distance the inner wheels and outer wheels travel as the car goes around a corner. An electronic control unit ecu uses inputs from multiple sensors, including yaw rate, steering input angle, and lateral accelerationand adjusts the distribution of torque to compensate for undesirable handling behaviours such as understeer. Get details of differential unit in automobile ppt. Jun 11, 2014 differential helps in turning the drive wheels at different rpm while the vehicle takes a turn. Construction and working of a differential in automobile in my previous article we saw about how trains turn on curved tracks. Auburn gear differential disassembly assembly instructions these instructions are intended as an aid for the experienced automobile mechanic in properly servicing the auburn gear limitedslip differential. Sep 07, 2016 automobile differential unit a mechanical gear assembly unit which provide different speedtorque to same axle wheels by. The rear axle and differential is attached to automobile frame via springs. In one of these, it receives one input and provides two outputs. Understand basic service and repair of a differential. Well also look at several types of positraction, also known as limited slip differentials. The differential is the powerdividing unit in general form it is a mechanism with a single input and two output link. Requirement transfers power from driveshaft to the wheels provides final gear reduction splits amount of torque going to each wheel allow the wheels to rotate at different speeds.
Identify the parts and the functions of different types of drive lines. Pdf the term automobile or automotive stands for a vehicle which can be moved by itself. Thanks for watching this restoration a truck battery, how to make a battery in local work shops pakistani workers duration. Therefore, an automobile is a selfpropelled vehicle. Car differential massachusetts institute of technology. All of the systems listed above have been impacted by the introduction of electronics. Differentials and drive axles study notes purposes of a drive axle assembly to transmit power from the drive shaft to the wheels to turn the power flow 90degrees on rwd cars to allow the wheels to turn at different speeds while cornering rwd live axle components rear axle housing. Chapter 11 drive lines, differentials, drive axles, and.
It consists of two bevel gears sun gear and two bevel gears planet gear. A differential unit sometimes called the diff is a very special mechanism designed to feed the engines torque to the driving wheels. Differentials open, locked, limited slip, edl, quattro the open differential thats more or less the diagram of the inside of differential for a rear wheel drive car. Differential unit locking system when the car is taking a turn, the outer wheel will have to travel greater distance as compared to the inner wheel.
Recent advances in differential drive systems for automobile. B 5323 port harcourt nigeria abstract the dissertation presents differential unit failures on behalf of toyota vehicles assessed, built upon professionals judgment. It is also an application that demands the relay be able to operate with unequal ct. Therefore, distance between differential and gear box keeps on.
Automobile engineering pdf notes ae notes pdf smartzworld. Here we present a simplified explanation of how and why an automobile differential works. Well in automobiles, we cant use the same principle for turning around a corner as our cars dont run on tracks. Understand the different types of universal and constant velocity joints. In vehicles without a differential, such as karts, both driving wheels are forced to rotate at the same speed, usually on a common axle driven by a simple chaindrive mechanism. Pdf automotive differential dynamics marco barreto academia. One is driven by a shaft from the engine, the other drives a shaft to the differential unit and drive axles. In automobile and other wheeled vehicles, the differential allows the outer drive wheel.
Both pulleys are split so that their halves can slide. Differentials are a variety of gearbox, almost always used in one of two ways. How to care for your cars differential popular mechanics. In the differential, bevel pinion gear is fixed to the propeller shaft which rotates the crown wheel. Bus protection is an application that demands many sets of cts be connected to the relays. A study on vehicle differential system international journal of. The crown wheel has another unit called the differential unit. Procedure involved in disassembly of differential unit is also explained. Identify the parts of the rear drive axle and front drive axle. How a differential works and types of differentials youtube. Construction and working of a differential in automobile. The 2006 revision of introduction to automotive technology represents the instructional materials laboratorys commitment to the continual improvement of the automotive technology curriculum. Automobile differential unit a mechanical gear assembly unit which provide different speedtorque to same axle wheels by.
Differential mechanical device 1 differential mechanical device a cutaway view of an automotive final drive unit which contains the differential input torque is applied to the ring gear blue, which turns the entire carrier blue, providing torque to both side gears red and yellow, which in turn may drive the left and right wheels. Chapter 11 drive lines, differentials, drive axles, and power. Are you looking for differential unit in automobile ppt. Pdf me6602 automobile engineering ae books, lecture notes. Differential helps in turning the drive wheels at different rpm while the vehicle takes a turn. We collected most searched pages list related with differential unit in automobile ppt and more about it.
It is expected that the mechanic be equipped with the proper tools, equipment, and experience before attempting to service the differential. Failure assessment of differential unit of automobile. Automobile differential unit explained with the types and general maintenance. Differentials open, locked, limited slip, edl, quattro the. Apr, 2014 differential is an arrangement of gears which work together and allow the vehicle to take a turn smoothly. Objectives after studying this unit, you should be able to. Differential gear box, structural analysis, design and structural analysis of differential gear box cite this article. This is the reason for a device known as a limited slip differential or traction control. In most cars, the differential is where the engine torque goes through its last gearing mechanism before spinning the wheels. Sep 10, 2015 automobile differential unit explained with the types and general maintenance. Ds90lt012aq automotive lvds differential line receiver check for samples. Thus, because the two wheels are not driven with the same speed, a differential is necessary. Aug 29, 2007 the purpose of a differential is four fold. Professor, 2me design 2 abstract a conventional differential that is nonlocked differential always supplies close to equal torque to each side.
Ds90lt012aq automotive lvds differential line receiver. Sai trinadh, design and analysis of differential gear box in automobiles, international. Introduction to automotive technology is the first in the ninemodule series. Objectives when you have completed this chapter, you will be able to do the following. We collected most searched pages list related with differential unit.
Components of four wheeler automobile chassis and body power unit. Sundaravalli we are pleased to bring out our fully revised new edition automobile engineering book for engineering and technology studies. Chapter 11 drive lines, differentials, drive axles, and power train. Ae automobile engineering notes book starts with the topics covering introduction. A car differential is placed halfway between the driving wheels, on either the front, rear, or both axes depending on whether its a front, rear, or 4wheeldrive car. Car wheels spin at different speeds, especially when turning. G etting power from the engine to the wheels of an automobile has provided a seemingly endless challenge for rearwheeldrive, frontwheeldrive, 4wheeldrive, frontengine, rearengine, and midengine cars, longitudinal, transverse, vertical, slant, and flat engines, plus an amazing array of hardware in between. The automotive differential is designed to drive a pair of wheels while allowing them to rotate at different speeds. If one of the wheels attached to a differential decides to hit some ice, for example, it slips and spins with all of the speed the differential has to distribute. This article will explain differentials where the power, in most cars, makes its last stop before spinning the wheels the differential has three jobs. This was produced on a budget but its purpose is to explain the concepts and not be a pixarb. A front wheel drive car basically doesnt have a normal input shaft, but everything else is the same. Describe the principles of the limited slip differential. Apr 03, 20 the differential is a component in all cars and is designed to compensate for the difference in distance the inner wheels and outer wheels travel as the car goes around a corner.