17AU44 Automotive Engines syllabus for AU

Construction and Operation:

Engine classification, Constructional details of spark ignition (SI) and compression ignition (CI) engines. Working principles. Two stroke SI and CI engines – construction and working. Comparison of SI and CI engines and four stroke and two stroke engines, theoretical and actual valve timing diagrams for engines.

Engine Cycles:

theoretical Otto, diesel and dual cycles, Fuel-air Cycles and Actual cycle.

Fuel Systems:

Air fuel ratio requirements of SI engines, Working of a simple fixed venturi carburetor and limitations, gasoline injection system, types, Diesel fuel injection systems-inline pumps, distributor pumps, Types of Nozzles, Unit injector and common rail injection systems, Need and types of governor for diesel engines and their comparison.

Combustion in S. I. and C. I. engines:

Introduction to combustion in SI and CI engines and stages of combustion. Factors effecting ignition lag and flame propagation in S.I. Engines, factors effecting delay period and uncontrolled combustion in C.I. Engines. Importance of Swirl, squish and turbulence in C.I. Engines.

Supercharging, Turbocharging and Cooling systems:

Supercharging and Turbocharging, Different methods of turbocharging, Intercooling, Turbocharger controls including, waster gate, variable geometry, Need for cooling, types of cooling systems- air and liquid cooling systems. Thermo-syphon and forced circulation and pressurized cooling systems. Properties of coolants.

Fuels and Lubricants:

Fuels for S.I and C. I engines and their requirements, Fuel ratings necessity of lubrication systems. Types-mist, pressure feed, dry and wet sump systems. Properties of lubricants. BIS standards for fuels and lubricants.

Course outcomes:

After completion of above course, students will be able to:

• Explain the constructional details of SI and CI engines and classify engines.
• Explain the construction and working of carburetors and fuel injection pumps.
• Explain the combustion process in SI and CI engines.
• Suggest an efficient cooling system for IC engines.
• Select a proper lubricant to be used in an automobile used in various environmental conditions.

Text Books:

1. Internal Combustion Engines- V. Ganesan 2007, Tata McGraw Hill

2. Internal Combustion Engines - Ramalingam K. K., Sci-Tech Publications, 2005.

Reference Books:

1. Advanced Engine Technology- Heisler SAE Publication

2. Internal Combustion Engines- Edward F. Obert

3. Fundamentals of Internal Combustion Engines- H. N. Gupta, PHI

4. Internal Combustion Engines- Mathur and Sharma, DhanpatRai and Sons 2002

5. Fundamentals of Internal Combustion Engines- John B. Heywood.