Page 211 - The Central Motor Vehicles Rules, 1989

RULE 115 THE CENTRAL MOTOR VEHICLES RULES, 1989 183

10. For diesel engine vehicles, 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.
11. The commercial Diesel fuel shall be as per Annexure IV-O in respect of the
places mentioned in sub-clause (i) of clause (a) of this sub-rule and in respect
of all other places, the commercial fuel shall be as per BIS specification IS:
1460-2005 (Fifth Revision) for Diesel. Specification for Commercial CNG
and LPG shall be as notified from time to time.
12. For vehicles with Gross Vehicle Weight exceeding 3,500 kg manufactured
on or after the 1st April, 2010,—
(i) deterioration factor shall be as given in the Table below:

Engine type Test cycle CO HC NMHC CH4 NOx PM
Diesel engine ESC 1.1 1.05 — — 1.05 1.1
ETC 1.1 1.05 — — 1.05 1.1
CNG, LPG or ETC 1.1 1.05 1.05 1.2 1.05 —
Gaseous fuelled
engine

(ii) alternatively, the vehicle manufacturers may opt for evaluation of
deterioration factor as specified in MoSRTH/CMVR/TAP-115/116, as
amended from to time.
Category of Vehicle in which engine will be installed Minimum Service
accumulation period
Category N1 Vehicles 100,000 km
Category N2 Vehicles 125,000 km
Category N3 Vehicles with GVW equal to or less than 16,000 kg 125,000 km
Category N3 Vehicles with GVW above 16,000 kg 167,000 km
Category M2 Vehicles 100,000 km
Category M3 Vehicles with GVW equal to or less than 7,500 kg 125,000 km

Category M3 Vehicles with GVW above 7,500 kg 167,000 km
The above ageing test should be carried out by the approval test agency.
13. In the case of Diesel vehicles, the engine power shall be measured on engine
dynamometer and the measured power shall not differ from the specified
power as given in Chapter-1 of Part IV of MoSRTH/CMVR/TAP-115/116,
as amended from time to time when tested as per procedures laid down in
Chapter-6 of Part IV of MoSRTH/CMVR/TAP-115/116, as amended from
time to time.