Page 271 - The Central Motor Vehicles Rules, 1989

RULE 115B THE CENTRAL MOTOR VEHICLES RULES, 1989 243

(b) Vehicles shall meet all the safety requirements as per AIS 024, AIS-028
Revision 1 as applicable.
(c) Type approvals for vehicles retrofitted with CNG kits shall be valid for three
years from the date of issue of such approval and shall be renewed for every
three years at a time.
(d) Type approval for vehicles retrofitted or modified for CNG operation shall
be given for vehicles of specific make and such kit shall be considered fit
for retrofitment in any vehicle within a specified range of engine capacity
of cc within a range of ± 7% tolerance for vehicles up to 1500 cc & ± 5% above
1500 cc.
(e) Real world driving cycle emission measurement using Portable Emissions
Measurement Systems (PEMS) shall be carried out for data collection for
three years from the date of notification for the computation of Conformity
factor (CF).
(f) The engine power shall be measured on engine dynamometer as per
procedures prescribed in AIS 137 as amended from time to time. Measured
power with CNG shall be within a range of -15% £ Power on CNG £ +5%
w.r.t the power measured on gasoline and the power test can be performed,
on request of the manufacturer, on the complete vehicle on a chassis
dynamometer. The engine power shall be calculated as the sum of the power
measured at wheels and the transmission losses of the vehicle.
(g) CNG vehicles or kit components, including their installation, shall conform
to the safety checks given in Annexure IX.
(h) In-service conformity and In-use Performance Ratio (IUPR) requirements
to be applicable after three years from the date of implementation of this
notification.]
B. O.E. CNG VEHICLES/CONVERTED DIESEL VEHICLE
(I) For O.E. CNG Dedicated Vehicle (including drive-away chassis) made by
Vehicle Manufacturers:
1
[(a) In case of CNG fitments by vehicle manufacturers on new diesel vehicles,
each model manufactured by vehicle manufacturers shall be type approved
as per the prevailing mass emission norms as applicable for the category of
new vehicles in respect of the place of its use;]
(b) O.E. CNG engine approved for specific engine capacity can be installed on
the base model and its variants complying with the requirements under
these rules as applicable;
(c) Tests for particulate matter and emission of visible pollutants (smoke) under
these rules shall not be applicable;
(d) Prevailing COP procedure will also be applicable.
(II) For conversion by modification of engines of In-use Diesel Vehicles:
(a) Type approval for diesel vehicle retrofitted/modified for dedicated CNG
operation shall be given for specific make and model of the vehicle, in view
of major changes or modifications involved in the CNG kit and diesel engine
depending upon make and model of the vehicle;

1 Substituted vide GSR 589(E), dt. 16-9-2005, w.e.f. 16-9-2006.