AU3303 Automotive Engines Syllabus:
AU3303 Automotive Engines Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
The objective of this course is to prepare the students with the knowledge on basics of constructional and working principles of automotive SI and CI engines along with their sub systems, thermochemistry of fuel‐air mixtures, combustion process, performance and emission characteristics of IC engines.
UNIT I ENGINE FUNDAMENTALS
Engine types and their operation- classifications – Terminology- Four stroke and two stroke cycle- Engine components, working principle of SI and CI engines – Engine operating parameters‐ Fuel –air and actual cycle analysis – Engine emissions – valve and port timing diagram – firing order
UNIT II INDUCTION AND IGNITION SYSTEM
Carburettors – mixture requirements – working principles, different circuits – Requirements and objective of injection system – types of injection – Jerk and distributor type pumps, Unit injector, common rail direct injection – Electronic fuel injection – GDI, Injection timing, Injection lag. Types of injection nozzle, Nozzle tests. Spray characteristics. Split and Multiple injection. Mechanical and pneumatic governors. Ignition system- battery coil, magneto coil and Electronic ignition system
UNIT III COMBUSTION OF FUELS
Combustion in SI engine – Stages of combustion- Flame Propagation- Rate of pressure rise Abnormal combustion- combustion chambers – design objectives and types Engine Knock Thermodynamic analysis of SI engine combustion- Burned and Unburned mixture states – combustion process characterization- CI Engine – Importance of air motion – Swirl, Squish and Tumble. Swirl ratio. Stages of combustion. Delay period – factors affecting delay period. knock in CI & SI engines. Direct and indirect injection combustion chambers for diesel combustion.
UNIT IV ENGINE COOLING, LUBRICATING AND EXHAUST SYSTEM
Cooling system – Function- types – working principle – Lubricating system- Function- types – Lubricant Requirements Necessity and limitation of supercharging. Types of supercharger and turbocharger. Intercooler. Matching of turbocharger. Modification of an engine for supercharging. Effect of supercharging on engine performance- exhaust system- exhaust manifold – muffler types.
UNIT V ENGINE TESTING AND MEASUREMENTS
Engine testing and measuring equipment- Indicated and brake MEP, operating variables that affect engine performance, efficiency and emission – Automotive and stationary engine testing and related standards – use of transient dynamometer for engine testing. Engine power– measurement of indicated power-brake power- frictional power- efficiencies – Heat balance – Methods to improve engine performance.
COURSE OUTCOMES:
Upon completion of this course, the students will be able to,
1. Identify various components of SI and CI engines
2. Explain the functions of IC engine sub‐systems like Ignition, cooling and lubrication
3. Understand the actual engine working principle and its thermochemistry of fuel‐air mixtures
4. Describe the basic knowledge on SI and CI engine combustion and its related parameters
5. Apply their knowledge in analyzing the engine performance and pollution characteristics.
TEXT BOOKS:
1. John B.Heywood , “ Internal Combustion Engines” , McGraw‐Hill Book Company, ISBN No: 0‐07‐100499‐8
2. M.L. Mathur and R.P.Sharma, Internal Combustion Engine, Dhanpath Rai Publications (P) Ltd, New Delhi 110002
3. V. Ganesan, Internal Combustion Engines, Tata‐McGraw Hill Publishing Co., New Delhi, 2010.
REFERENCES:
1. Heinz Hesiler, Advanced engine technology. Butterworth Heinmann publications
2. Heldt, P.M., High Speed Combustion Engines, Oxford IBH Publishing Co., Calcutta,
3. K. K. Ramalingm, internal Combustion Engines, Scitech publications, Chennai, 2003.
4. Maleev, V.M., Diesel Engine Operation and Maintenance, McGraw Hill, 1974.
5. Obert, E.F., Internal Combustion Engine analysis and Practice, International Text Book Co.,Scranton, Pennsylvania, 1988.