Automotive and Combustion Engine Technology(Department Elective III) — Winter 2018

What is engine downsizing?

How is stratified charge combustion achieved?

What are the types of nozzle used in gasoline direct injection? Also explain their constructional features.

What is lean boost direct injection (LBDI) concept?

Explain Lean NOx trap

What are the problems associated with turbo charging the spark-ignition engine? Explain any two of the problems in detail.

Describe the three combustion concepts (wall, air and spray) for the implementation of mixture preparation of gasoline direct injection

Write short notes on exhaust emission.

Explain the salient features of the first-generation

Describe the different approaches to HCCI operation in gasoline engines?

Write short notes on exhaust gas treatment on fuel economy.

Explain the salient features of the second-generation

With a neat sketch explain thermodynamic analysis of gasoline direct injection at part-load condition.

Write short notes on engine knock

Mention the advantages of direct injection system.

Describe how the selective catalytic reduction (SCR) NOx control as an alternative to lean NOx traps (LNT).

Draw a diagram of a typical DI gasoline engine with sensors and control

Explain the conventional diesel combustion with a neat sketch.

Explain the principle of autoignition combustion in the gasoline engine.

What is turbo charging?

With a neat sketch explain the process of turbo charging?

Describe the different approaches to HCCI operation in gasoline engines?

Explain the thermodynamic aspects of gasoline direct injection

Differentiate turbo charging and super charging.

Describe the fundamental principle of HCCI combustion in gasoline engines.