F G1169 Pages: 2

Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SEVENTH SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019

Course Code: EE469

Course Name: Electric and Hybrid Vehicles

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 Explain rolling resistance and aerodynamic drag in vehicles. (5)
2 With the help of a neat block diagram explain different subsystems of electric (5)

drive train.

3 Classify the electric motors drives for EV and HEV application. (5)
4 Explain the terms specific power and energy efficiency of a battery. (5)
5 Explain the role of drive cycle for a city bus in designing the size of energy (5)

storage for electric vehicle.

6 What are the sizing constraints for the electric motor? (5)

7 What is the significance of a communication network in electric/hybrid (5)
vehicles? What are the functions of the in-vehicle communication network?

8 Why an energy management control system is required in an HEV? Do you (5)
think an elaborate energy management system similar to that applied to a hybrid

vehicle, is required in an electric vehicle? Explain.

PART B
Answer any two full questions, each carries 10 marks.
9 a) Why a gear system is needed for an ICE? Explain with relevant characteristic (6)
curves.
b) Explain the EV drivetrain alternatives based on power source configuration. (4)
10 a) A vehicle with power plant power output at the drivetrain considering all losses (3)
is 100kW. The maximum total resistance the vehicle experiences is 3.6 KN.

Calculate the velocity the vehicle can achieve in km/h under this condition?

b) Explain the various power flow control modes for a series hybrid vehicle. (7)
11 a) What is meant by “gradeablity’? Explain. (4)
b) Explain the power flow control modes for a series-parallel hybrid vehicle. (6)

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