Page 281 - The Central Motor Vehicles Rules, 1989

RULE 115B THE CENTRAL MOTOR VEHICLES RULES, 1989 253

Explanation:—
(a) Vehicles offered for type approval to the testing agency referred in rule 126
shall have to comply with fitness requirement, as applicable under these
rules;
(b) test procedure and safety guidelines and code of practice for such dual fuel
CNG or Bio-CNG or LNG vehicles, kit components including installation
thereof shall be as per AIS-024, as amended from time to time, till such time
as corresponding BIS specifications are notified;
(c) testing agencies will be required to indicate specifically, the models and
variants on which the replacement of new engine shall be valid;
(d) mass emission standards for CNG or Bio-CNG or LNG dual fuel engines or
vehicles shall be same as are applicable for diesel engines or vehicles with
exception that the HC shall be replaced by NMHC (Non-Methane
Hydrocarbon) on measurement basis.
(e) the test applicability requirements for dual fuel engine is depending on the
Gas Energy Ratio (GER) measured over test-cycle applicable as per
prevailing norms. GER classification shall be as per MoRTH/CMVR/
TAP-115/116 (as amended from time to time) and notification issued by the
Central Government in this respect.]
1
[CB. Replacement of In-use BS VI Diesel engine by new CNG engine for vehicle
categories L, M&N with GVW less than 3.5T
(a) For type approval of in-use BS VI vehicle having diesel engine replaced by
new CNG engine, it shall meet BS VI emission norms as applicable to the
category of vehicle in respect of its place of use subject to tests mentioned
in the table given below:
TABLE
Sl. No. Applicable test Reference document
1. Mass emission test (Type I test) 1. CMV Rule 115(18)(i), 115(19),
115(20) or 115(22) as applicable
2. On-Board diagnosis
MoRTH/CMVR/TAP115/116 Part
3. In-service conformity and IUPR XIV Chapter 14 Annexure 3
2. AIS - 137
4. CO2 emission CO2 to be measured and reported

5. Gradeability test AIS 003
6. EMC test (Vehicle level or assembly level) AIS 004 (Part 3)
7. Offset Frontal Collision AIS-098
Note : Only if there is increase in the kerb
mass w.r.t approved model/variant
having highest GVW, by more than 8%
(b) Vehicles shall meet all the safety requirements as per AIS 024, AIS-028
Revision I as applicable.

1 Inserted vide GSR 625(E), dt. 11-8-2022, w.e.f. 12-8-2022.