Page 179 - The Central Motor Vehicles Rules, 1989
P. 179

RULE 115        THE CENTRAL MOTOR VEHICLES RULES, 1989               151
                                                                 1
                                                                 [TABLE-A
                                   (PETROL/COMPRESSED NATURAL GAS/LIQUEFIED PETROLEUM GAS DRIVEN
                                   VEHICLES MANUFACTURED AS PER [BHARAT STAGE-IV OR BHARAT STAGE-VI]
                                                                  NORMS)

                                   Sl.           Type of vehicle         Idle emission  High idle emission limits
                                   No.                                      limits
                                                                       CO%     HC      CO%     Lambda l
                                                                             (n hexane
                                                                             equivalent)
                                                                               ppm
                                   (1)                (2)               (3)     (4)     (5)       (6)
                                   1.  Compressed Natural Gas/ Liquefied  0.3  200      –     1 + 0.03 or as
                                       Petroleum Gas driven four wheelers                     declared by the
                                       manufactured as per Bharat Stage-IV or                   vehicle
                                       Bharat Stage VI norms                                  manufacturer]
                                   2.  Petrol driven four wheelers manufactured  0.3  200  0.2
                                       as per Bharat Stage-IV or Bharat Stage VI
                                       norms
                                   3.  Compressed Natural Gas/Liquefied  0.5   500      —
                                       Petroleum Gas driven two/three wheelers
                                       manufactured as per Bharat Stage VI norms
                                   4.  Petrol driven two/three wheelers  0.5   500      0.3
                                       manufactured as per Bharat Stage VI norms
                                      Note : The test shall be carried out using the instrument type approved as per rule
                                 116(3) of the Central Motor Vehicles Rules, 1989 (CMVR) with the vehicle engine
                                 warmed up after a run of minimum 15 minutes on a variable course under normal traffic
                                 condition. During the test the vehicle engine shall be running at idling speed and the
                                 sampling probe shall be inserted into the vehicle exhaust system to a depth not less than
                                 300mm. In case CO and/or HC emission values recorded during the test are not within
                                 the limits, the testing shall be discontinued and the vehicle owner shall be advised to
                                 resubmit the vehicle after repair/service.
                                         * The idling emission standards for vehicles when operating on Compressed
                                            Natural Gas (CNG), shall contain Non-Methane Hydro Carbon (NMHC) in
                                            place of Hydrocarbon (HC) and shall be estimated by the following formula:
                                            NMHC = 0.3 x HC
                                            Where HC = Total hydrocarbon measured as n-hexane equivalent
                                            Similarly  idling emission standards  for vehicles  when operating  on
                                            Liquefied Petroleum GAS (LPG) shall contain Reactive Hydro Carbon
                                            (RHC) in place of Hydrocarbon (HC) and shall  be  estimated by the
                                            following formula:
                                            RHC = 0.5 x HC
                                            Where HC = Total Hydrocarbon measured as n-hexane equivalent:
                                      PROVIDED that in case of Petrol vehicles fitted with three way closed loop catalytic
                                 converters operating in a specific city or area, the Government of the respective State or

                                 1  Substituted vide GSR 881(E), dt. 26-11-2019, w.e.f. 26-11-2019.
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