AT2401 Engine & Vehicle Management Systems NOV/DEC 2012 important questions

[Mr.lonely]

UNIT I:

PART A:

Define open and closed loop control strategies.
Explain briefly about PID control
What is meant by Look up tables.
Explain briefly about Fuzzy logic and adaptive control.
List the Parameters to be controlled in SI and CI engines.
List the Parameters to be controlled for the overall vehicle.

PART B:

Explain the architecture of a microprocessor.
Explain about open loop and closed loop control in an automobile.
Explain about fuzzy logic and adaptive control technique.
What is meant by a look up table and how it is used in engine control?

UNIT II:

PART A:

Expalin briefly the Hall effect.
Explain briefly the principle of thermistor
Explain the piezo electric effect.
What is the need to know the throttle position?
How air mass flow is calculated?
Why crank shaft position and cam position is to be known?
Explain briefly about tire pressure sensor.
What is closed loop control using EGO sensor?

PART B:

1. Explain the construction and working of a sensor based on hall effect and its application in a car.
2. Explain the construction and working of a sensor based on piezo electric effect and its
application in a car.
3. Explain the hot wire anemometer operation with neat sketches.
4. Explain the various types of crash sensors.
5. Explain the EGO sensor construction and operation.

UNIT III:

PART A:

Plot conversion effciency versus lambda of a 3 way catalytic converter.
List the various types of Bosch injection systems.
What is meant by Group injection technique.
List the various fuel system components.
List the various phases of electronic engine control.
Explain briefly about Fuel control maps.
List the advantages of Electronic ignition systems.
What do you meant by engine knock?

PART B:

Explain the working of Bosch L Jetronic systems.
Discuss the various phases of electronic engine control.
Explain about electronic ignition system.
Explain about spark timing control.
Explain a simple fuel injection system.

UNIT IV:

PART A:

List Fuel injection system parameters affecting combustion
What are the emissions in CI engines.
What is meant by Pilot injection?
What is meant by advanced post injection and retarded post injection?
What is meant by Electronically controlled Unit Injection system?
List the components of the common rail fuel injection system.

PART B:

Explain about Pilot, main, advanced post injection and retarded post injection.
Explain about Electronically controlled Unit Injection system.
Draw the Layout of the common rail fuel injection system and the working of its components.
Discuss the Fuel injection system parameters affecting combustion, noise and emissions in CI engines.

UNIT V:

PART A:

What is the advantage of ABS system
What is meant byDamping control?
What are the advantages of Electric power steering?
What is meant by Supplementary Restraint System?
List the types of crash sensor.
What do you meant by Cruise control?
List the various Vehicle security systems
What is meant by On board diagnostics?

PART B:

Explain ABS system, its need, layout and working.
Explain Electronic control of suspension – Damping control
Explain the working of Electric power steering, Explain working of air bag system
Explain seat belt tightening system.
Explain cruise control system.
Explain vehicle tracking system.
Explain On board diagnostics (OBD I & II).
Explain Collision avoidance Radar warning system.