Page 284 - The Central Motor Vehicles Rules, 1989

256 THE CENTRAL MOTOR VEHICLES RULES, 1989 RULE 115C

11. Dedicated Dual fuel engine operation shall mean a two-fuel system having
diesel as a primary combustion fuel and CNG or Bio-CNG or LNG as supplementary
fuel and such dedicated dual fuel engine shall not operate on diesel stand-alone mode
in absence of gaseous fuel or operation of the engine in diesel mode only shall be
restricted by reduced power output to 40 percent to cater limp home mode and in such
dedicated dual fuel engine, mass emission test will be carried out in dual fuel mode
only.]
1
[(2) The mass emission standards applicable to Original Equipment CNG
Dedicated Vehicles under sub-rule (1) shall be applicable to Original Equipment
manufactured vehicle having GVW > 3.5 T, when Liquified Natural Gas is used as fuel.
(3) The Liquified Natural Gas composition used for carrying out emission shall
meet the fuel specification as notified by the Government of India in the Ministry of
Petroleum and Natural Gas, or Bureau of Indian Standard, as the case may be, for
automotive application from time to time:
PROVIDED that till such time the Liquified Natural Gas fuel complying to the
requirements as provided in Annexure IV-LA shall be used for the purpose of type
approval and conformity of production.
2
[(4) This Original Equipment manufactured LNG dedicated vehicle or Converted
LNG vehicle from in-use diesel vehicle GVW > 3.5 T or O.E. or retrofitted LNG dual fuel
vehicle or engine including its kit components shall meet the safety requirements and
code of practice as in laid down in AIS-024 and AIS-028 (Rev. 1), as amended from time
to time.]]
3
[115C. Mass emission standards for Liquefied Petroleum Gas (hereinafter in this rule

referred to as LPG) driven vehicles
4
115C
[(1) Mass emission standards for vehicles when operating on Liquefied Petroleum
Gas (hereinafter in this rule referred to as "LPG") shall be same as are applicable for
gasoline vehicles with the exception that HC shall be replaced by Reactive Hydrocarbon
(RHC), where RHC=0.5 x HC.]
(2) For Gasoline Vehicles with Original Equipment (hereinafter in this rule referred
to as O.E.) Fitment,—
5
[(a) In case of LPG fitments done by vehicle manufacturers on new gasoline
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) base model and variants of such vehicle shall conform to these rules as
applicable and type approval emission norms in petrol mode as specified
in these Rules. In the case of LPG mode, it shall meet mass emission norms
as specified in rule 115 only excluding crankcase and evaporative emission
norms;

1 Inserted vide GSR 643(E), dt.27-6-2017, w.e.f. 27-6-2017.
2 Substituted vide GSR 1151(E), dt. 29-11-2018, w.e.f. 29-11-2018. Prior to substitution, sub-rule (4) read as
under:
“(4) The Original Equipment manufactured Liquified Natural Gas dedicated vehicle having GVW > 3.5 T
shall meet the safety requirements as laid down in AIS-024 and AIS-028 as amended from time to time.”
3 Inserted vide GSR 284(E), dt. 24-4-2001, w.e.f. 24-5-2001.
4 Substituted by CMV (Amdt.) Rules, 2004, vide GSR 111(E), dt. 10-2-2004, w.e.f. 10-8-2004.
5 Substituted vide GSR 84(E), dt. 9-2-2009, w.e.f. 9-2-2009.