| For Four Wheelers |
|
|
|
|
|
|
|
| Norm |
Year of implementation |
Region |
Technological
improvement in vehicle |
| India
2000 |
2000 |
Nationwide |
O2 sensors- heated type and specially designed
for super fast light off Introduction of close coupled catalyzers or
maniverters in the exhaust system Introduction of electronic fuel injection
system Change in catalytic loading |
| Bharat Stage II |
2001 |
NCR*, Mumbai, Kolkata, Chennai |
| 2003.04 |
NCR*, 13 Cities† |
| 2005.04 |
Nationwide |
| Bharat Stage III |
2005.04 |
NCR*, 13 Cities† |
| 2010.04 |
Nationwide |
| Bharat Stage IV |
2010.04 |
NCR*, 13 Cities† |
| * National Capital Region (Delhi) |
| † Mumbai, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmedabad,
Pune, Surat, Kanpur, Lucknow, Sholapur, Jamshedpur and Agra |
|
|
|
|
| For Two and
Three Wheelers |
|
|
|
|
|
|
| Norm |
Year of implementation |
Technological improvement in the vehicle |
| Two-stroke technology |
four-stroke
technology |
| Bharat Stage-I |
2000 |
Intake exhaust,
combustion optimization, |
Four stroke engine technology |
| catalytic converter |
| Bharat Stage-II |
2005 |
Secondary air injection catalytic convertor |
Hot tube secondary air injection |
|
|
|
|
|
|
|
|