driving cycle
TRANSCRIPT
Notes for Mrs. P.P.Parikh
Driving cycles for Mass Emission Tests on Chassis Dynamometer
In India the driving cycle used for mass emission measurement for the purpose of Type Approval and COP is called as the “Indian Driving Cycle (IDC)” which was derived based on the actual measurement of heterogeneous driving pattern in major Indian cities. The important aspect of Indian Driving Cycle is that all categories of vehicles including small engine capacity mopeds are able to follow the cycle without violations. The major features of the IDC are given in Table below.
Table: Features of IDC
TimeDistance
Avg. Speed
Max. Speed
Max. accel.
Max Decel
Idle time ratio
Accel. Time ratio
Decel time ratio
Cruise time ratio
sec km km/h km/h m/s2 M/s2 % % % %IDC (6 Cycles)
648 3.948 21.93 42 0.65 0.63 14.81 38.89 34.26 12.04
Figure 1: Graphical Representation of IDC
C:/KCV/VIT/PGA Lecture Notes/AFE/KCV Notes/Driving Cycle.doc - 1 -
Notes for Mrs. P.P.Parikh
For four wheelers India has adopted the European driving cycle with slight modification. Whereas the European driving cycle has 120 kmph as the max speed, the Indian cycle has truncated the max speed to 90 kmph as reproduced below in
Figure 2: Indian Driving Cycle for 4-Wheelers
Different countries have developed different driving cycles depending on the prevalent conditions. Figure 3 below reproduces some of the cycles being followed around the world for certification of automobiles
Figure 3: Different Driving Cycles
C:/KCV/VIT/PGA Lecture Notes/AFE/KCV Notes/Driving Cycle.doc - 2 -
0
20
40
60
80
100
0 500 1000
Time (sec)
Spe
ed (k
m/h
)
One Cycle of 195 sec
Part 1: 780 sec
Max Speed 90 kph
Part 2: 400 sec
0
20
40
60
80
100
0 500 1000
Time (sec)
Spe
ed (k
m/h
)
One Cycle of 195 sec
Part 1: 780 sec
Max Speed 90 kph
Part 2: 400 sec
Notes for Mrs. P.P.Parikh
Modified IDC cycle for 4 W heeler Certification Testing
0
20
40
60
80
100
0 200 400 600 800 1000 1200
Time in sec.
Sp
ee
d
Km
/hr
IDC cycle for 2- and 3-Wheeler Certification
0
10
20
30
40
50
0 20 40 60 80 100Time in sec.
Spe
ed K
m/h
rUS EPA FTP-72 Certification Driving Cycle
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0 50 100 150 200 250 300 350 400 450 500
EPA FTP-72
Modified IDC cycle for 4 W heeler Certification Testing
0
20
40
60
80
100
0 200 400 600 800 1000 1200
Time in sec.
Sp
ee
d
Km
/hr
IDC cycle for 2- and 3-Wheeler Certification
0
10
20
30
40
50
0 20 40 60 80 100Time in sec.
Spe
ed K
m/h
rUS EPA FTP-72 Certification Driving Cycle
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0 50 100 150 200 250 300 350 400 450 500
EPA FTP-72
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