Presentation On Industrial Training

AtHimachal Road Transport

Corporation Hamirpur (H.P.)

SAURABH SHARMA &SANJEEV KUMAR

ROLL NO. 100461130850 & 100461130849BRANCH: MECHANICAL ENGG.

ACKNOWLEDGEMENT

This report is a result of our industrial training held at H.R.T.C workshop hamirpur . We thanks to Er. Vivek Lakhanpal workshop manager the most important factor for us to complete our training successfully. We also thanks to the whole working staff of workshop who gave us their precious knowledge during the training period.

INTRODUCTION TO WORKSHOP

• Workshop is a place where various component are repaired and manufactured . In the H.R.T.C workshop the various parts like engine, gearbox, wheel system, differential, battery etc. Are repaired or tested, for the good and long running of the vehicle.

LITERATURE SURVEY

We briefly studied about the following system of a bus :

Transmission System

Braking System

TRANSMISSION SYSTEM

Transmission system have following parts:

Clutch

Gear Box

Propeller Shaft

Differential

CLUTCH

Clutch is the mechanism interposed between engine and the gear box which enables power to transmit at the WILL to the gear box through friction drive. When clutch pedal is pressed the clutch is disengaged and thus no motion and power flow from engine to gear box.

The fly wheel is attached to the clutch plates in the clutch box with the engine.

Single plate dry friction type of clutch is used in TATA buses.

Gear Box 

A gearbox is a protective casing for a system of gears which is used to transmit torque to the propeller shaft at various speeds. It consist of two shafts:

1) Primary shaft

2) Secondary shaft

PROPELLER SHAFTPropeller shaft is attached after the gear box and

consist of universal joint.

It is attached with the differential at 90 degree angle and converts torque gear box to the differential.

PROPELLER SHAFT

DIFFERENTIAL

Differential is a mechanism used in rear wheel axel to reduce the speed of inner wheel and increase speed of outer wheel while taking turn.

The number of teeth in Leyland buses are (37×6)

DIFFERENTIAL PARTSCrown wheel

Sun gear(two)

Star gear(four)

Axel of shaft

Pinion

BRAKE

• A brake is a device used either to bring to a body which is in motion or to hold a body in state of rest or of uniform motion against the action of external force or couple.

TYPES OF BRAKES

Foundation brakes are the most common air-brake systems found in HRTC buses .

1) Frictional brakes 

2) Pumping brakes

3) Electromagnetic brakes

WORKING OF AIR BRAKING SYSTEM

Air compressor: Pumps the air into storage tanks to be used in the brake system

Foot valve (brake pedal): When depressed, air is released from the reservoir tanksAir reservoir tanks: Hold compressed or pressurized air to be used by the braking system

Master cylinder: The master cylinder is a control device that converts non-hydraulic pressure(commonly from a driver's foot) into  hydraulic pressure.

AIR DRYER

A device that extracts moisture from the air.

Shops that use compressors may have to use air dryers to keep

shop air free from moisture

BRAKE BOOSTER

The Booster’s Function is to give more Braking Power with minimum pressure on the Brake pedal.it is located between brake pedal and master cylinder

NEED OF BRAKING SYSTEM

• It must stop the vehicle with smallest possible distance.

• It must strong enough to sustain sudden braking force.

• It must operate with least effort by the driver.

• Braking lining should have longer life.

TECHNICAL SPECIFICATIONS OF

HRTC BUSES

TATA BUSENGINE

• Model : TATA 697 na di

• Type: Diesel direct injection

• No. of cylinder: 6 in line

• Capacity: 5675cc

• Clutch: single plate dry

friction

• Gear box type: TATA GBS -40

(Synchromesh)

• Fuel tank: 90 litres

•ASHOKA LEYLAND

FeaturesMETRO / CITY - Used for Passenger mass Transportation. Ideal for city bus application

ENGINE"H” series 6 DTI - 6 cyl. Turbo charged intercooled diesel BS-III Max. Power167 PS @ 2400 rpm

Max. Torque55 Mkg @ 1500 rpmDiaphragm type 380 mm DiaGear box 5 Speed Synchromesh

In our industrial training, we were introduced to industrial environment. We learned discipline and cooperation during training & we felt good when we came in contact with engineers & workers. Most importantly we had learn the process of doing work in big work shop with complete knowledge of transmission system & braking system which will be useful for us when ever we go to any industry or work shop as an employee.

CONCLUSION

REFERENCES

1)www.google.co.in2)www.hrtc.gov.in3)www.howstuffworks.com4)www.wikipedia.com