Table 1.
Evolution of PROCONVE emission limits for new light-duty vehicles in Brazil
| PROCONVE phase | Model-yeara | CO (g/km) | HC (g/km) | NOx (g/km) |
|---|---|---|---|---|
| I | Until 1991 | 24.00 | 2.10 | 2.00 |
| II | 1992–1996 | 12.00 | 1.20 | 1.40 |
| III | 1997–2006 | 2.00 | 0.30 | 0.60 |
| IV | 2007–2009 | 2.00 | 0.16 | 0.25 |
| V | After 2010 | 2.00 | 0.05 | 0.12 |
CETESB (2001), CETESB (2009), and CONAMA Resolution No. 315/2002
aAccording to the implementation schedule, 40% of new vehicles were required to meet phase IV standards in 2005, 70% in 2006, and 100% in 2007. For phase V, 40% were required to meet the new standards by 2008, 70% by 2009, and 100% by 2010