ME 6602 Automobile Engineering lecture notes PDF

This Post covers the syllabus of ME6602 Automobile Engineering Unit 1 Vehicle Structure and Engines and the lecture notes of the vehicle structure and engines which was prepared as easy to understand the concepts. You can study this content you can get 80+ marks in university examinations.

ANNA UNIVERSITY,CHENNAI

DEPARTMENT OF MECHANICAL ENGINEERING

YEAR/ SEM:   III/VI
         SUBJECT CODE/NAME: ME 6602/AUTOMOBILE                                                                  ENGINEERING

REGULATION 2013

OBJECTIVES:

To understand the construction and working principle of various parts of an automobile.
To have the practice for assembling and dismantling of engine parts and transmission system.

The syllabus of unit 1 is given below.

Click to download: ME6602 Automobile Engg Unit wise important university questions

Click ME6602 Automobile Engg Anna University Question April May 2014

UNIT I VEHICLE STRUCTURE AND ENGINES 

CONTENTS:

• Types of automobiles, 
• vehicle construction and different layouts, 
• chassis, frame and body, 
• Vehicle aerodynamics (various resistances and moments involved), 
• IC engines –components, functions and materials, 
• variable valve timing (VVT).

Click:ME6602 Automobile Engineering Notes PDF

First of all the we are discussing about overall introduction of an Automobile Engineering. This content consists of types of Automobiles and how does it constructed and different layout of the vehicle is given.

Click:DME- Previous 5 years Anna University questions 

What is Chassis of an Automobile and How the chassis are classified?

Types  of Chassis frames

What do you meant by sub-frame of an automobile?

Frame less Construction:

The frame less construction of the vehicle is also called as unitized body design. The frame less construction of the vehicle is discussed here the following images.

What is Crumple one?

The vehicle body is shown in the figure. The figure shows that the components or parts of the vehicle. The parts of the body is discussed from the following images.

Main Parts of the body is listed below.

The body materials is made up of more efficient materials such cast iron, steel,glass,aluminium etc,.

Aerodynamics:

What do you meant by Aerodynamics and features incorporated into the vehicle design 

Importance of Aerodynamics:

  For all Mechanical Engineering subjects lecture notes PPT, lecture notes PDF, University questions, Important university questions bank of 2 marks and 16 marks are given in left side of this page.

The various aerodynamics forces of resistance and moments are discussed from the following figure.

  For all Mechanical Engineering subjects lecture notes PPT, lecture notes PDF, University questions, Important university questions bank of 2 marks and 16 marks are given in left side of this page.

Types of Aerodynamic forces is listed below.

Types of Aerodynamic moments are as follows.

Click to download: ME6602 Automobile Engg Unit wise important university questions

Click ME6602 Automobile Engg Anna University Question April May 2014

Click:DME- Previous 5 years Anna University questions 

Unit wise lecture notes are available in this site.

Download Lecture notes and question bank of unit 2 from the following link:

 http://annaunivstudymaterials.blogspot.in/2015/11/me6602-automobile-engineering-lecture.html

For more lecture notes of the unit 1 ,unit 2 ,unit 3 ,unit 4 and unit 5 and other mechanical engineering subjects lecture notes PPT, lecture notes PDF, University questions, Important university questions bank of 2 marks and 16 marks are given in your left side of this page or visit to our website.

  annaunivstudymmaterials.blogspot.com

ME6601 Design of Transmission Systems 2 marks with Answers

This post covers the unit wise important 2 marks questions with answers for the subject of Design of Transmission systems, Make it for your reference to study at the examination.

ANNA UNIVERSITY,CHENNAI
DEPARTMENT OF MECHANICAL ENGINEERING

SIXTH SEMESTER / III YEAR

ME6601 – DESIGN OF TRANSMISSION SYSTEM

Click: DME previous 5 years Anna University Questions

UNIT -I

PART-A

1.     How is a Wire rope specified?

Ans: They are specified by the no. of strands & the no. of wires in each strand.

2.     Sketch the cross section of a V-belt and label its important parts.

Ans: Refer pg. no. 2.1 Dots by V.Jayakumar

3.     Why is the face of a pulley crowned?

Ans: The crowning tends to keep the belt in centre on a pulley rim while in motion.

4.     What are the five parts of roller chain?

Ans: Pin link, Roller link, Pins, Bushes & Roller

5.     Give the relationship of ratio of tensions in a V-belt drive.

Ans: T₁/T₂ = e ^μα.cosecβ

6.     What is a silent chain? In what situations, silent chains are preferred?

Ans: i ) Inverted tooth chains are called silent chains because of their relatively quiet operation.

ii) They are preferred for high-power, high speed & smooth operation.

7.     Define maximum tension in a belt.

Ans: Tension on tight side of the belt + Centrifugal tension

8.     Give the condition for maximum power transmission in terms of centrifugal tension in case of belt drive.

Ans: The power transmitted shall be maximum when the centrifugal tension (T_c) is one third of the maximum belt tension (T).

9.     Why tight side of the flat belt should be at the bottom side of the pulley?

Ans: Because the driving pulley pulls the belt from bottom side and delivers it to the upper side. So it is obvious that the bottom side of the belt is tight.

10.                         What is meant by ‘chordal action of chain’?

Ans: When chain passes over the sprocket, it moves as a series of chords instead of a continuous arc as in the case of a belt drive. It results in varying speed of the chain drive. This phenomenon is known as chordal action.

UNIT -II

PART-A

1.     Mention a few gear materials.

Ans: Metallic gears – steel, cast iron

          Non-Metallic gears – wood, compressed paper & synthetic resins

2.     State an advantage and disadvantage of helical gear.

Ans: Advantage: Produce less noise than spur gears

  Dis Advantage: Subjected to axial thrust loads

3.     Why is tangential component of gear tooth force called useful component?

Ans: Because it transmits power.

4.     Compare the contact between mating teeth of spur and helical gears.

Ans: i) In spur gears the line of contact is parallel to the axis of rotation. The total length of contact line is equal to the face width.

ii) In helical gears the line of contact is diagonal across the face of the tooth. The total length of contact line is greater than the face width. This lowers the unit loading & increases load carrying capacity.

5.     What is backlash in gears?

Ans: It is the difference between the tooth space and the tooth thickness along the  pitch circle.

6.     What is the advantage of helical gear over spur gear?

Ans: i) Helical gears produce less noise than spur gears.

ii) Helical gears have a greater load capacity than equivalent spur gears.

7.     Why is a gear tooth subjected to dynamic loading?

Ans: Inaccuracies of  tooth spacing, Irregularities in tooth profiles, Misalignment between bearings.

8.     State the law of gearing or conditions of correct gearing.

Ans: It states that for obtaining a constant velocity ratio, at any instant of teeth the common normal at each of contact should always pass through a pitch point, situated on the line joining the centres of rotation of the pair of mating parts.

9.     What are the commonly used gear tooth profiles?

Ans: Involute & Cycloidal

10.                         State about herring bone gear.

Ans: The double helical gears connecting two parallel shafts are known as herringbone gears. They are used in heavy machinery and gear boxes.

UNIT -III

PART-A

1.     When do we employ crossed helical gear?

Ans: A pair of crossed-helical gears also known as spiral gears are used to connect and transmit motion between two non-parallel and non- intersecting shafts. As the contact between the mating teeth is always a point, these gears are suitable only for transmitting a small amount of power.

2.     Mention two characteristics of hypoid gear.

Ans: They are similar in appearance to spiral-bevel gears. Their pitch surfaces are hyperboloids rather than cones. Axis of pinion is offset from the axis of the gear.

3.     What are the various forces acting on a bevel gear?

Ans:Tangential force, Axial force & Radial force

4.     Usually worm is made of hard material and worm gear is made of softer material – justify.

Ans: A material strength is set so that an amount of wear of the worm becomes larger that of the worm wheel.

5.     When is bevel gear preferred?

Ans: They are used to transmit power between two intersecting shafts.

6.     Calculate the angle between the shafts of a crossed helical gears made of two right handed helical gears of 15˚ helix angle each.

Ans:Shaft angle, Ө = β1 + β2 = 2β = 2 (15˚) = 30˚

7.     State the use of bevel gears.

Ans: They are used to transmit power between two intersecting shafts.

8.     State the advantage of worm gear drive in weight lifting machine.

Ans:The worm gear drives are irreversible. It means that the motion cannot be transmitted from worm wheel to the worm. This property of irreversible is advantageous in load hoisting applications like cranes and lifts.

9.     Why is the crossed helical gear drive not used for power transmission?

Ans:As the contact between the mating teeth of crossed helical gears is always a point, these gears are suitable only for transmitting a small amount of power. That’s why mostly these gears are not used for power transmission.

10.                         Why is the efficiency of a worm gear drive comparatively low?

Ans: Because of power loss due to friction caused by sliding.

UNIT -IV

PART-A

1.     What are the points to be considered while designing a sliding mesh type of multi-speed gear box?

Ans: i) The transmission ratio in a gear box is limited by ¼ < i < 2

ii) Speed ratio of any stage should not be greater than 8.

2.     Which type of gear is used in constant mesh gear box? Justify.

Ans: Helical gears are used in constant mesh gear boxes to provide quieter and smooth operation.

3.     Compare sliding mesh and synchromesh gear box.

Ans: sliding mesh gear box: It derives its name from the fact that the meshing of the gears take place by sliding of gears on each other. With sliding mesh gear box, double de-clutching is necessary to bring the two sets of dog teeth to the same speed so that they can be slid into engagement quietly.

synchromesh gear box: To eliminate the need to de-clutch, the synchromesh gear box was introduced. The basic gear box is laid out in the same manner as the constant mesh, but with the addition of a cone clutch fitted between the dog and gear members.

4.     Where is multi-speed gear boxes employed?

Ans: They are employed wherever the variable spindle speeds are necessary.

5.     Name the series in which speeds are arranged in multi-speed gear boxes.

Ans: Basic series of preferred numbers are R5, R10, R20, R40 & R80.

6.     List six standard speeds starting from 18 rpm with a step ratio 1.4.

Ans:  For the step ratio Φ = 1.4, the R20 series, the standard speeds are 18, 20, 22.4, 25, 28 & 31.5 rpm.

7.     Sketch the kinematic layout of gears for 3 speeds between two shafts.

Ans: Refer pg.no: 9.11 Dots by V.Jayakumar

8.     Differentiate ray diagram and structural diagram.

Ans: Ray diagram is a graphical representation of the structural formula.

Structural diagram is a kinematic layout that shows the arrangement of gears in a gear box.

9.     List out the basic rules to be followed for optimum gear box design.

Ans: i) The transmission ratio in a gear box is limited by ¼ < =i < 2

ii) Speed ratio of any stage should not be greater than 8.

10.                         What is step ratio? Name the series in which speeds of multi-speed gear box are arranged.

Ans: When the spindle speeds are arranged in geometric progression, then the ratio between the two adjacent speeds is known as speed ratio.

Basic series are R5, R10, R20 & R40.

UNIT -V

PART-A

1.     Name the profile of cam that gives no jerk.

Ans:  Circle –arc cam gives no jerk. Because the derivative of acceleration of cam is zero.

2.     Give the reasons for left and right shoes of the internal expansion brakes having different actuating forces.

Ans:  Depending upon the direction of the drum rotation, one shoe would be a leading shoe and another shoe is a trailing shoe. The leading shoe is self energizing whereas the trailing shoe is not. In the leading shoe, the friction force helps the applied force and hence more actuating force than the trailing force.

3.     What are the effects of temperature rise in clutches?

Ans: i) Excessive surface temperature results in premature clutch failure.

ii)  May cause the individual plates to be welded together in metal clutches.

iii) May cause excessive wear in non-metal clutches.

4.     What is the significance of pressure angle in cam design?

Ans: The pressure angle is very important in cam design as it represents steepness of the cam profile. If the pressure angle is too large, a reciprocating follower will jam in its bearings.

5.     State the advantage of cam mechanisms.

Ans: Cams are used for transmitting desired motion to a follower by direct contact. Cam mechanisms are used in the operation of IC engine valves.

6.     How the ‘uniform rate of wear ‘assumption is valid for clutches?

Ans: In clutches, the value of normal pressure, axial load for the given clutch is limited by the rate of wear that can be tolerated in the brake linings. Moreover , the assumption of uniform rate wear gives a lower calculated clutch capacity than the assumption of uniform pressure. Hence clutches are usually designed on the basis of uniform wear.

7.     Name four profiles normally used in cams.

Ans: Uniform velocity, Simple harmonic motion, Uniform acceleration & retardation, Cycloidal motion.

8.     Under what condition of a clutch, uniform rate of wear assumption is more valid?

Ans:  If the clutch is  old one.

9.     When do we use multiple disk clutches?

Ans: It is used when large amount of torque is to be transmitted. In a multiplate clutch, the number of frictional linings and the metal plates are increased which increases the capacity of the clutch to transmit torque.

10.                         Differentiate between self-energizing and self-locking brakes.

Ans: When the frictional force is sufficient enough to apply the brake with no external force, then the brake is said to be self-locking brake.

When the frictional force helps in applying the brake, then the brake is said to be self-energised brake.

ME6602 Automobile Engineering Question Bank

This post covers the question bank of Automobile Engineering.Take for your future reference and to get more marks in university examinations. Anna University, Chennai Regulation 2013 Department of Mechanical Engineering Question Bank

ME 6602-Automobile Engineering-  VI SEMESTER

Unit-I      

                                                                                           Click:ME6602 Automobile Engineering Notes PDF                         

                                                Part A

1. .What are the functions of frame?

2. List out the various materials used in the construction of chassis frames.

3. Write down any two main sections of vehicle construction.

4. What are two types of vehicle suspensions?

5. What loads are coming to axle?

6. What is the function of gear box?

7. Why you need a gear box?

8. Name the different kind of resistances to vehicle motion

9. Why is the frame narrow at front?

10. List out the various materials used in the construction of vehicle body

11. Why are the side members of the frame upswept at two places?

12. What is the function of a bumper?

13. What are the stresses to which the frame members are subjected to?

14. Name few components of engine.

15. What are the types of frames?

16. What is meant by self-propelled vehicle?

17. List the various manufacturers of automobile products in India.

18. State the major types of automobiles according to the fuel used.

19. Classify automobiles with respect to the drive of the vehicle.

20. What is meant by the term Chassis?

21. How automobiles are classified into different types?

22. What are the two types of cylinder liners?

23. What are the functions of piston rings?

24. What are the two types of piston rings?

25. What are the different methods of engine cooling?

26. What are the advantages of air-cooled engines?

27. What are the components of water cooling method?

28. State the difference between S.I and C.I engine.

      Parameter SI Engine CI Engine

29. What is clearance volume? And what are its effects?

30. What are the functions of piston, connecting rod, crankshaft and cylinder

      head?

31. What is the purpose of cooling system?

32. State the merits and demerits of air and water cooling system.

33. What is the purpose of lubricating system? State its types.

34. What is meant by turbo charging?

35. What are the various pollutants in I. C engine?

36. What is meant by P.C.V? And what are its effects?

37. What is a Catalyst?

38. Write down the firing order a 4cylinder and 6cylinder engine

Part B

1. Compare the merits and demerits of a frameless construction with those of the conventional framed construction. (16)

2. Explain the following terms:

(i) Load distribution in frames (ii) Frame types with sketch (iii) Frame materi als (iv) Frame testing. (16)

3. Explain the construction of various frames used in automobiles with neat sketch. (16)

4. (i) Define chassis, frame, body and suspension. (4)

(ii) Explain briefly about structure of passenger car with neat sketch. (12)

5. (i) Discuss the various resistances to vehicle motion (8)(ii) Discuss the need of a gear box. (8)

6. Explain any five components of engine with neat sketch. (16)

7. Explain the materials used to manufacture the components of engine (16)

8. Explain briefly the various types of chassis construction with suitable diagrams. (16)

9. Discuss briefly the details of a two wheeler frame. (16)

10. Explain integral and semi integral type vehicle body construction. (16)

                                  UNIT-II

Part A

1. What is gasoline injection?

2. What is conventional ignition system?

3. Define common rail ignition system..

4. What is unit injection system?

5. What is a rotary distributor?

6. What are the functions of a spark plug?

7. Write is Electronic ignition system?

8. What is the functions of Turbo chargers?

9. Why the . Engine emissions to be controlled?

10. What are the advantages of petrol injection?

11. What is super charging?

12. What are the pollutants emitted by an automobile?

13. What is meant by carburetion in I.C engine?

14. What are the advantages of electronic fuel injection system over conventional  

       injection?

15. What are the functions of generator and starting motor?

16. What is the function of an ignition system in I.C engine?

17. State the requirements of ignition system? And state its types

18. What is the ignition advance?

19. What are the difference between battery coil ignition and magneto ignition system?

20. What is the sealed head lamp system?

21. What is the function of carburettor ?

22. What are the merits and demerits of mono point and multi point fuel injection

       system?

23. List the different methods of battery charging.

24. State the principle of working of an  A.C. Generator.

25. In what respect does a Dynamo differ from an Alternator?

26. What is the purpose of Stator  in the Torque Converter?

27. What are the components of lead acid battery?

28. What are the different types of starter motor drives?

29. What are the chemicals used in battery?

30. What is a dry charged battery?

31.  What is the purpose of the grid?

32.How will you distinguish a positive plate from a negative plate in a lead acid battery?

33. What is the function a cut out in a charging system?

34. What is the function of regulators in a charging system?

Part B

1. Explain the working principle of electronic ignition system (16)

                                                           

2. Discuss the merits and demerits of electronic ignition system (16)

3. With a suitable sketch, explain the Electronically controlled gasoline injection system (16)

4. With a neat sketch, explain the Electronically controlled diesel injection system. (16)

5. Explain the turbo charging system with neat sketch. (16)

6. What is 3 way catalytic converter? Explain its working principle. (16)

7. Explain common rail direct injection system with neat sketch. (16)

8. Explain the Unit injector system with neat sketch. (16)

                                               

                                                    

UNIT-III

PART_A

1.  State the functions of clutch.

2. What is the function of pressure plate in a clutch?

3. What are the different types of clutches?

4. Write the main function of gear box.

5. What are the functions of universal joint?

6. State the function of differential unit.

7. What is meant by differential lock?

8. What is a fluid coupling?

9. State the functions of slip joint.

10. What is the function of a propeller shaft?

11. What are the requirements of an automotive transmission?

12. What are the requirements of a clutch?

13. What are the types of gear box?

14. What is the use of torque convertor?

15. State the forces act on the rear axle.

16. What is tractive effort?

17. Why is sliding mesh gearbox not preferred?

18. What is automatic transmission?

19. What is an overdrive?

20. What is a universal joint?  What are its types?

21. What is Hotchkiss drive and Torque Tube drive?

22. What are the different types of rear axles?

23. What is the purpose of Stator in the Torque Converter?

24. Why Synchronizer is required in the automotive transmission system?

25. What is transfer box? Where it is used?

Part B

1. (i) Explain the working principle of torque tube drive with neat sketch. (8)

(ii) Explain the working principle of hotch kiss drive with neat sketch. (8)

2. Explain the construction and working principle of a typical gear box. (16)

3. (i) What is a clutch? Explain the operation of centrifugal clutch. (8)

(ii) Explain the working principle of synchromesh gear box with neat sketch. (8)

4. (i) Explain the types of rear axles with neat sketch. (12)(ii) What is the necessity of a gear box? (4)

5. Explain the working principle of fluid flywheel with neat sketch and also mention the limitations. (16)

6. Explain the single plate clutch and multiplate clutch with neat sketch. (16)

7. (i) Explain the working of sliding mesh gear box with neat sketch. (10)

(ii) Explain the working of a cone clutch. (6)

8. (i) Explain the working of a constant mesh gear box. (8)

(ii) Explain the working of universal joint with neat sketch. (8)

9. (i) Explain the working of epicyclic gear box with neat sketch. (8)

(ii) Compare fluid coupling and torque convertor. (8)

10. Explain the construction and working of a differential unit with neat sketch. (16)

11. Explain the principle of working of torque convertor with neat sketch. (16)

                                                  

                                                           

UNIT-IV

PART - A

1. Define wheel track and wheel base.

2. Give a brief note on damper.

3. Distinguish between disc brake with drum brake.

4. What is meant by bleeding of brakes?

5. Define steering gear.

                                                          

6. What are the four types of wheels?

7. What is the purpose of Toe-in and Toe-out?

8. What are the different types of tyres used in automobile?

9. What are the different types of springs used in suspension system?

10. Define king pin inclination.

11. Give the function of tyre?

12. Define caster and camber.

13. What are the benefits of anti-lock brake system?

14. What is steering ratio?

15. What is toe in and toe out?

16. What are the types of steering gearbox?

17. What are main advantages of power steering?

18. What is function of suspension system in automobile?

19. What is the function of brake? State its type.

20. What are the functions of front axles?

21. What I section at middle and oval section at end is preferred for front axle?

22. What are the different types of stub axles? Which is the most preferred one?

23. What is meant by the term “tread”?

24. What is a self energizing brake?

25. What is disc brake?

26. What is meant by electric brake?

27. What is regenerative braking?

Part B

1. (i) Sketch and explain various steering geometries. (8)

(ii) Explain with the help of simple diagram the different typas of stub axles. (8)

2. Explain the working principles of hydraulic brake with neat sketch. (16)

3 (i) Explain a typical power steering system. (8)

(ii) Explain the wheel alignment system. (8)

4. (i) Explain any one type of steering gear box with neat sketch. (12)

(ii) What is the necessity of a steering gear? (4)

5. Explain the steering geometry with neat sketch. (16)

6. Explain the working of power steering with neat sketch. (16)

7. (i) Explain the Ackerman principle of steering with neat sketch. (10)

(ii) Explain the working of torsion bar with neat sketch. (6)

8. (i) Explain the working of rear independent suspension system with neat sketch. (8)

(ii) Explain the working of front independent suspension system with neat sketch. (8)

9. (i) Explain the working of shock absorber with neat sketch. (8)

(ii) What are the objectives and components of suspension system. (8)

10. Explain the mechanical brakes with neat sketch. (16)

11. Explain the pneumatic or air brakes with neat sketch. (16)

                                                  

                                                           

UNIT-V

PART - A

1. List the advantages of hydrogen fuel used in automobiles.

2. What is a hybrid vehicle?

3. What is a fuel cell?

4. Write the composition of LPG and CNG.

5. Define detonation and pre-ignition.

6. What is the need for CNG?

7. What are the advantages of an electric car?

8. What are the advantages of hybrid system?

9. State the advantages of fuel cell.

10. What are the types of fuel cell?

11. What are the alternative fuels?

12. What are the various properties of gaseous fuel?

13. What is BIO-DIESEL? State its advantages.

14. What are advantages of LPG overconventionalfuels?

15.What are the dis advantages of using alcoholas an alternative fuel?

16. Define flame speed.

17.List out the various forms of natural gas.

18.Write down the components of LPG equipment.

19.Write down the parts of a fuel cell.

20.What are the properties of CNG?

21.What are the two types of LPG used for automotive-engine fuel?

22. What are the main components of electric and hybrid vehicles?

23. What are the advantages of Gasohol?

Part B

1. How bio diesel is produced? Explain and its usage in automobiles. (16)

2. Explain the operation of hydrogen fueled vehicle with neat sketch. (16)

3. Explain the working principle of fuel cell with neat sketch. (16)

4. Discuss the operation of an LPG propelled vehicle with neat sketch. (16)

5. Explain the concept of hybrid vehicles with neat sketch. (16)

6. (i) Explain the usage of gasohol fuel in automobiles. (8)

(ii) Explain the working of an electric car. (8)