This document specifies the test method for measuring the electrical energy consumption of electric power train vehicles. It outlines the test procedure which involves fully charging the REESS, running the vehicle through 34 cycles of the Indian Driving Cycle within 4 hours, recording the distance traveled, and calculating the energy consumption in Wh/km. Parameters like time, distance, temperature, speed, and energy are measured with defined accuracies and resolutions. The vehicle must pass requirements specified by the manufacturer for energy consumption.

1. • Scope
• Vehicle Preparation
• Operating Mode
• Indian Driving Cycle
• Test Procedure
• Test method
• Application of the cycle and Measurement of the distance
• Electrical Energy Consumption Calculation
Electric Power Train Vehicles-
Measurement of Electrical Energy Consumption

2.  Specifies method for the measurement of electrical energy consumption
 Energy Consumed is expressed in Wh/km for L, M & N Categories of the electric
power train vehicles

3.  Vehicle tyres to be inflated at the pressure specified by the manufacturer at ambient
temperature.
 The vehicle should have undergone at least 300 km during the seven days before
test with those REESS that are installed in the test vehicle

4.  Ambient temperature: 20°C- 30°C
 Test method
Initial Charge of REESS
Application of 34 cycles of IDC( of 108s duration each) for
L category of vehicles
Charging of the REESS
Calculation of the electrical energy consumption

5. 0
10
20
30
40
50
0 20 40 60 80 100
TIME(sec)
SPEED(km/hr)
Time
(sec)
Distance
(km)
Avg.
Speed
(kmph)
Max.
Speed
(kmph)
Max. Acc.
(m/s²)
Max.
Dece.
(m/s²)
Idle Time
Ratio (%)
Acc. Time
Ratio (%)
Dece.
Time
Ratio (%)
Cruise
Time
Ratio (%)
IDC 108 0.658 21.93 42 0.65 0.63 14.81 38.89 34.26 12.04
No. of operation
Acceleration
(m/sec)2
Speed
(km/h)
Duration of
each
operations)
Cumulative
time(s)
(1) (2) (3) (4) (5)
01. Idling - - 16 16
02. Acceleration 0.65 0-14 6 22
03. Acceleration 0.56 14-22 4 26
04. Deceleration -0.63 22-13 4 30
05. Steady speed - 13 2 32
06. Acceleration 0.56 13-23 5 37
07. Acceleration 0.44 23-3l 5 42
08. Deceleration -0.56 31-25 3 45
09. Steady speed - 25 4 49
10. Deceleration -0.56 25-21 2 51
11. Acceleration 0.45 21-34 8 59
12. Acceleration 0.32 34-42 7 66
13. Deceleration -0.46 42-37 3 69
14. Steady speed - 37 7 76
15. Deceleration -0.46 37-34 2 78
16. Acceleration 0.32 34-42 7 85
17. Deceleration -0.46 42-47 9 94
18. Deceleration -0.52 27-14 7 101
19. Deceleration -0.56 14-00 7 103

6.  REESS is fully charged as per overnight charge procedure until the end of charge
criteria.
 34 Indian driving cycle is given as per Annexure-II of CMVR
 The reference curve has to be followed.

7.  It permits to measure the electric energy consumption expressed in Wh/km.
 Parameters, units and the accuracy of measurements
PARAMETER UNIT ACCURACY RESOLUTION
TIME s ± 0.1s 0.1s
DISTANCE m ± 0.1% 1m
TEMPERATURE °C ± 1°C 1°C
SPEED km/h ± 1% 0.2km/h
MASS kg ± 0.5% 1kg
ENERGY Wh ± 0.2% Class 0.2 s according to IEC 687

8. End of Charging
Time t₀ is recorded
34 Cycles Of IDC
within 4 Hours
Distance is
recorded
Vehicle Connected
to mains within 30
minutes
Energy measuring
device is connected
between mains and
vehicle charger
Charging is stopped after
24 hrs from the previous
end of charging time t₀

9. No
If value < 4%
specified by
manufacturer
Another Test
Average of the
two values
Energy Consumption (Ec)
Approved
Approved
If value < 4%
specified by
manufacturer
Final Test
Average of the
three values
If value < 4%
specified by
manufacturer
Approved
Rejected
No
Yes
No
Yes
Yes