Page 231 - The Central Motor Vehicles Rules, 1989

RULE 115 THE CENTRAL MOTOR VEHICLES RULES, 1989 203

Table : Maximum Allowed Conformity Factors (CF) for in-service
Conformity Emission Testing

Parameter Maximum Allowed Conformity Factor
(CF)
CO 1.5
THC (1) 1.5
(2)
NMHC 1.5
CH4(2) 1.5
NOx 1.5
(1)
For Compression Ignition Engines
(2)
For Positive Ignition engines]
(13) The vehicles specified in this sub-clause shall meet the following World Not-To-
Exceed (WNTE) Off-cycle laboratory testing limits for gaseous and particulate
exhaust emissions, and as per procedure laid down in AIS:137 and as amended
time to time:—
Test cycle CO THC NOx PM
mg/kWh mg/kWh mg/kWh mg/kWh
(1) (2) (3) (4) (5)
WNTE 2000 220 600 16

(14) The vehicles specified in this sub-clause manufactured on or after 1st April, 2023
shall have the capability of assessing the in-use performance of on-board diagnos-
tic, as per procedure laid down in AIS:137 and as amended time to time.
(15) The vehicles specified in this sub-clause fitted with engine, which rely on the use
of a reagent in order to reduce emissions, shall ensure the correct operation of NOx
control measures, as per procedure laid down in AIS:137 and as amended time to
time.
(16) The vehicles specified in this sub-rule shall be equipped with an On-Board Diag-
nostic system (BS VI OBD-I and BS-VI OBD-II) for emission control which shall
have the capability of identifying the likely area of the malfunctions by means of
fault codes stored in computer memory and communicating that information
off-board, as per procedure described in AIS:137, when that failure results in an
increase in emission above the limits given in the following Tables below:—
(a) BSVI-OBD-I threshold for BS VI vehicles manufactured on or after 1st April,
2020 shall be as given below:—