Classification of Tractors - History of Engines- Tractor engines – Engine operation-Understanding the working principle of a Diesel engine - 4 Stroke compression- Ignition engine cycle-Inlet and Outlet valves– Valve timing diagram- Engine efficiency - Engine operating cycle -Firing order –Firing internal - Combustion chambers – Construction details of engine blocks, Cylinder head and Crankcase - Features of cylinder, Piston, Connecting rod and Crankshaft.
Valve and valve mechanism-Air and fuel supply-air cleaner- Fuel pump- Exhaust– Silencer. Cooling and lubrication system- Starting and electrical system- Transmission system-clutches, brakes, power train- transmission- Gears- Types of high and low gears transmission- Gear box- Differential and final drive mechanism- Engine governing. Steering geometry– Steering systems- Front axle and wheel alignment. Brake– types.
Tractor PTO, Belt-pulley, properties of Hydraulic fluids- Hydraulic system -hydraulic couplings, Torque convertors- Hydraulic circuits- position and draft control- Weight transfer-theory of traction- Tractive efficiency–Tractor chassis mechanics- Stability- longitudinal and lateral .Controls- visibility–operator’s seat. Tractor steering mechanism-Types- caster camber- king pin inclination- Toe-in and Toe-out- Tractor Hitching.
Power tiller-Special features-Clutch-Gearbox-Steering and brake. Makes of tractors and power tillers. Types of tests-test procedure- Need for testing & Evaluation of farm tractor–Test codes for performance testing of tractors and power tillers. Cost of operation of tractors and power tillers.
Ergonomic aspects of tractors and power tillers- Substitution of fossil fuels with Biofuels to protect the environment from GHG pollution-case studies.
Reference Book:
Robert Allen Kepner, Roy Bainer, Edgar Lee Barger, Principle of Farm machinery, AVI Pub. Co., 1978, 527 pages Rajeev Kumar, Farm Power and Machinery Engineering (English), First Edition, Standard publishers and distributors,NewDelhi. ISBN-10 8180140253, 2008. Arun Dahake, An Introduction to Farm Power and Machinery, 2015. ISBN No. 9781312800885, (Standard Copyright License), 1st Edition, 2017, www.lulu.com, S.C.Jainand C.R.Rai, Farm tractor maintenance and repair. Standard publishers and distributors ,NewDelhi, 1999.
Text Book:
R.K. Veera Selvam, Farm Machinery and Power, Oxford Book Company, 2010,ISBN 10: 9380179634 / ISBN 13: 9789380179636 A.M. Michael and T. P. Ojha, Principles of Agricultural Engineering, Vol. 1
