KNOW THE EXHAUST EMISSION STANDARDS

The pollution standards for in use vehicles have been

prescribed under Rule 115(2) of Central Motor vehicles Rules, 1989.

They are :

PETROL/CNG/LPG VEHICLES:

S.No	Vehicle Type	CO %	HC (n-hexane equivalent) ppm
1	2&3-Wheelers (2/4-stroke) (Vehicles manufactured on and before 31/3/2000)	4.5	9000
2	2&3-Wheelers (2-stroke) (Vehicles manufactured after 31/3/2000)	3.5	6000
3	2&3-Wheelers (4-stroke) (Vehicles manufactured after 31/3/2000)	3.5	4500
4	4- wheelers manufactured as per pre Bharat Stage II norms	3.0	1500
2	4- wheelers manufactured as per Bharat Stage- II, Bharat Stage III	0.5	750
2	4- wheelers manufactured as per Bharat Stage- II, Bharat Stage III	0.5	750

(PETROL/COMPRESSED NATURAL GAS/LIQUEFIED PETROLEUM GAS DRIVEN VEHICLES, MANUFACTURED

S.No.	Vehicle Type	Idle Emission Limit		High Idle Emission Limited
(1)	(2)	(3)		(4)
		CO%	HC(n Hexane Equivalent ppm)	CO%	Lambda(RPM-2500±200)
1.	Compressed Natural Gas/Liquefied Petroleum Gas driven 4 wheelers manufactured as per Bharat Stage IV norms.	0.3%	200ppm	-	-
2.	Petrol driven 4-wheelers manufactured as per Bharat Stage IV norms.	0.3%	200ppm	0.2	1/+ 0.03 or as declared by the vehicle manufacturer.

(II) FOR DIESEL VEHICLES

S.No.	Method Of Test	Maximum Smoke Density
(1)	(2)	(3)
		Light absorption coefficient (1/metre)	Hartidge Units
1.	Free acceleration test for turbo charged engine and naturally aspirated engine for vehicles manufactured as per pre-Bharat Stage IV norms.	2.45	65
2.	Free acceleration test for turbo charged engine and naturally aspirated engine for vehicles manufactured as per Bharat Stage IV norms.	1.62	50"