Page 196 - The Central Motor Vehicles Rules, 1989

168 THE CENTRAL MOTOR VEHICLES RULES, 1989 RULE 115

14. The vehicles described in clauses (A), (B) and (C) of this sub-rule should
comply with rule 115(2).
(D) Diesel Vehicles with GVW exceeding 3500 kg shall conform to the following
norms:—

Limit Values for Type Approval (TA) as well as (COP)

Engine Steady State Cycle (ESC) test Engine Load
Response (ELR)
test

1 (2)
CO (g/kWh) HC (g/kWh) NOx (g/kWh) PM (g/kWh) (2) Smoke (m- )

(1)
2.1 0.66 5.0 0.10/0.13 0.8

(1)
For engines having swept volume of less than 0.75 litre per cylinder
and a rated power speed of more than 3000 rpm
(2)
For diesel engines only
Notes :
1. The test shall be on engine dynamometer.
2. There shall be no relaxation of norms for COP purposes.
3. The gaseous and particulate emissions are to be determined on the ESC test
as described in EEC document 1999/96/EC.
4. The smoke opacity is to be determined on the ELR test as described in EEC
document 1999/96/EC
5. In case of vehicles operating on CNG or LPG mode all the provisions
prescribed in rules 115B and 115C shall be respectively applicable, except
that limiting value shall be as per clause (D) above.
6. The reference fuel shall be as specified in Annexure IV F, Annexure IV H
and Annexure IV-I for diesel, LPG and CNG, respectively.
7. The Conformity of Production (COP) testing procedure shall be as described
in section 9 of Annexure-I of EEC Directive 88/77/EEC last amended by
1999/96/EC
8. The COP frequency and samples:
(i) The COP period for each engine model including its variants shall be
once in a year.
(ii) For production volume of less than 250 for six months, the method as
prescribed in the proviso to rule 126A shall apply.
9. For diesel engine vehicles, the emission of visible pollutants (smoke) shall
not exceed the limit value of smoke density, as per Annexure-I to rule 115(9).
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.