Tuesday, 19 April 2016

Emission Norms in India

What are BS standards?

Bharat Standards or Bharat Stage was first implemented in the year 2000 to regulate the amount of exhaust gases emitted from a vehicle. Since 2000, Indian Government has implemented various norms to match the global standards.

What are the main exhaust gases?

Hydrocarbons (HC), carbon monoxide (CO), nitrous oxide (NOX) and particulate matters (PM) are the 4 main exhaust gases.

HC and CO are more prevalent in gasoline engines, whereas NOX and PM are more prevalent in diesel engines.

BS norms specification:

  1. Two and three wheelers:

BS-I norms 2000 (2 & 3 wheelers)

Vehicle type
CO (g/km)
HC (g/km)
HC + NOX (g/km)
PM (g/km)
2W (Gasoline)
2
-
2
-
3W (Gasoline)
4
-
2
-
3W (Diesel)
2.72
-
0.97
0.14


BS-II norms 2001 (2 & 3 wheelers)

Vehicle type
CO (g/km)
HC (g/km)
HC + NOX (g/km)
PM (g/km)
2W (Gasoline)
1.5
-
1.5
-
3W (Gasoline)
2.25
-
2
-
3W (Diesel)
1
-
0.85
0.10


 2.   Passenger Cars and Light Commercial Vehicles (LCV):

BS-I norms 2000

Vehicle type
CO (g/km)
HC (g/km)
HC + NOX (g/km)
PM (g/km)
Gasoline
2.72
-
0.97
-
Diesel (W ≤ 1250)
2.72
-
0.97
0.14
Diesel (W between 1250 and 1700)
5.17
-
1.40
0.19
Diesel (W > 1700)
6.90
-
1.70
0.25

W- Weight of the vehicle (kg)

BS-II norms 2001

Vehicle type
W (kg)
CO (g/km)
HC (g/km)
HC + NOX (g/km)
PM (g/km)
Gasoline (GVW ≤ 2500)
-
2.20
-
0.50
-

Gasoline (GVW > 2500)
W ≤ 1250
2.20
-
0.50
-
1250 < W < 1700
4

0.60

W > 1700
5

0.70







Diesel (GVW ≤ 2500)
-
1
-
0.70
0.08

Diesel (GVW > 2500)
W ≤ 1250
1
-
0.70
0.08
1250 < W < 1700
1.25
-
1
0.12
W > 1700
1.50
-
1.20
0.17

GVW- Gross Vehicle Weight (kg)

BS-III norms 2005

Vehicle type
W (kg)
CO (g/km)
HC (g/km)
NOX (g/km)
HC + NOX (g/km)
PM (g/km)
Gasoline (GVW ≤ 2500)
-
2.30
0.20
0.15
-
-

Gasoline (GVW > 2500)
W ≤ 1305
2.30
0.20
0.15
-
-
1305 < W < 1760
4.17
0.25
0.18
-
-
W > 1760
5.22
0.29
0.21
-
-







Diesel (GVW ≤ 2500)
-
0.64
-
0.50
0.56
0.05

Diesel (GVW > 2500)
W ≤ 1305
0.64
-
0.50
0.56
0.05
1305 < W < 1760
0.80
-
0.65
0.72
0.07
W > 1760
0.95
-
0.78
0.86
0.10


BS-IV norms 2010


Vehicle type
W (kg)
CO (g/km)
HC (g/km)
NOX (g/km)
HC + NOX (g/km)
PM (g/km)
Gasoline (GVW ≤ 2500)
-
1
0.10
0.08
-
-

Gasoline (GVW > 2500)
W ≤ 1305
1
0.10
0.08
-
-
1305 < W < 1760
1.81
0.13
0.10
-
-
W > 1760
2.27
0.16
0.11
-
-







Diesel (GVW ≤ 2500)
-
0.50
-
0.25
0.30
0.025

Diesel (GVW > 2500)
W ≤ 1305
0.50
-
0.25
0.30
0.025
1305 < W < 1760
0.63
-
0.33
0.39
0.04
W > 1760
0.74
-
0.39
0.46
0.06


Bharat stage 6 will be the equivalent of the Euro 6 norms. The link is posted below:

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