Page 236 - The Central Motor Vehicles Rules, 1989

208 THE CENTRAL MOTOR VEHICLES RULES, 1989 RULE 115

(e) Reference natural gas fuel used in Natural Gas or Bio-Methane
mono-fuel or bi-fuel vehicles shall be as per Annexure IV-L (G20, G23
and G25).
(f) Reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be
as per Annexure IV-M (Fuel A and Fuel B). However, in case of
non-availability of reference fuels for CNG/LPG, the commercially
available CNG as per BIS 15958:2012 and LPG as per BIS 14861:2000
as amended from time to time shall be used for the purpose of Type
Approval and Conformity of Production.
(g) Hydrogen Fuel vehicles shall be tested with reference fuel specified in
the Annexure IV-W to said rules.
(h) The reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013
and as amended time to time.
1
[(i) The reference ethanol fuel (E20) shall be as per IS 17021:2018.
(ii) The reference for Hydrogen Compressed Natural Gas (HCNG) shall
be as per IS 17314:2019.]
(5) Specifications of Commercial Fuels shall be as under:—
(a) The Commercial Gasoline fuel blend shall be as per Annexure IV-U.
(b) Specification for commercial CNG and commercial LPG shall be in
accordance with BIS 15958:2012 and as per BIS 14861:2000 respectively.
(c) Biodiesel used in commercial Diesel shall be as per IS 15607.
(d) Specification for Commercial Diesel fuel shall be as per Annexure
IV-V.
(e) Specifications for commercial E85 shall be as specified in accordance
with the Indian Standards.
(f) Specification for Biogas (Bio-methane) shall be as per IS 16087:2013 and
as amended time to time.
1
[(g) Specification for commercial ethanol fuel (E20) shall be as per IS
17021:2018.
(h) Specification for commercial Hydrogen Enriched Compressed
Natural Gas (HCNG) shall be as per IS 17314:2019.]
(6) Gasoline/CNG/LPG vehicles specified herein shall comply with the
provisions of clause (i) of sub-rule (2) of rule 115. The Vehicle equipped with
CI engine specified in sub-rule shall comply with the provision of clause (ii)
of sub-rule (2) of rule 115. For vehicles fitted with CI engine, the emission
of visible pollutants (smoke) shall not exceed the limit value of smoke
density, as per Annexure I to sub-rule (9) of rule 115. These smoke limits
are without correction factor and engines are to be tested with conditioned
air supplied to the engine to maintain atmospheric factor of 0.98 to 1.02.
(7) Crankcase ventilation system shall not permit the emission of any of the
crankcase gases into the atmosphere.
(8) Alternatively, to the fixed DF mentioned in Table 1 of this sub-rule, the
vehicle manufacturers may opt for evaluation of deterioration factor as per
procedure described in AIS 137 and as amended time to time.

1 Inserted vide GSR 156(E), dt. 8-3-2021, w.e.f. 8-3-2021.