Page 225 - The Central Motor Vehicles Rules, 1989
P. 225
RULE 115 THE CENTRAL MOTOR VEHICLES RULES, 1989 197
TABLE 1
On-Board Diagnostic (BS VI - OBD-I) Threshold: BS VI
Reference mass CO (mg/km) NMHC NOx PM
(RM) (kg) (mg/km) (mg/km) (mg/km)
Category Class PI CI PI CI PI CI PI (1) CI
M (M1 & – All 1900 1750 170 290 150 180 25 25
M2)
N1 I RM < 1305 1900 1750 170 290 150 180 25 25
II 1305 < RM < 3400 2200 225 320 190 220 25 25
1760
III 1760 < RM 4300 2500 270 350 210 280 30 30
N2 – All 4300 2500 270 350 210 280 30 30
(1)
For positive ignition, particulate mass limits apply only to vehicles with direct injection
engines
(ii) OBD Threshold for BS VI vehicles manufactured on or after 1st April
2023:
TABLE 2
On-Board Diagnostic (BS VI - OBD-II) Threshold: BS VI
Reference mass CO (mg/km) NMHC NOx PM
(RM) (kg) (mg/km) (mg/km) (mg/km)
Category Class PI CI PI CI PI CI PI (1) CI
M (M1 & – All 1900 1750 170 290 90 140 12 12
M2)
N1 I RM < 1305 1900 1750 170 290 90 140 12 12
II 1305 < RM < 3400 2200 225 320 110 180 12 12
1760
III 1760 < RM 4300 2500 270 350 120 220 12 12
N2 – All 4300 2500 270 350 120 220 12 12
(1)
For positive ignition, particulate mass apply only to vehicles with direct injection engines
(17) In-use performance ratio (IUPR) for BS VI vehicles manufactured on or after
1st April, 2023, the in-use performance ratio (IUPR) of a specific monitor M
of the OBD systems shall be:
IUPRM = Numerator/Denominator
(i) Comparison of Numerator and Denominator gives an indication of
how often a specific monitor is operating relative to vehicle operation.
Detailed requirements for tracking IUPR are given in AIS 137.
(ii) If, according to the requirements specified in AIS 137, the vehicle is
equipped with a specific monitor M, IUPRM shall be greater or equal
to 0.1 for all monitors M.