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.
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