Know the Exhaust Emission Standards

Smoke density for all diesel-driven vehicle shall as follows
Sl.no Method of Test Maximum Smoke Density
Light Absorpition Co-efficient (1/m) Hatridgetridge Units
1 Free acceleration for Turbo charged engine and naturally aspirated engine for vehicles manufactured as per pre Bharat Stage IV norms 2.45 65
2 Free acceleration for Turbo charged engine and naturally aspirated engine for vehicles manufactured as per Bharat Stage IV norms 1.62 50
Petrol/CNG/LPG driven vehicles, manufactured as per Bharat Stage –IV norms
Sl.no Vehicle Type Idle emission limits High idle emission limits
1 Compressed natural Gas/LPG 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
Petrol/CNG/LPG shall comply with the idling emission standards for Carbon Monoxide (CO) and Hydro Carbon (HC) given in the Table below:
Sl.no Vehicle Type CO% *HC (n-hexane equivalent ppm)
1 2 & 3 –Wheelers (2/4-stroke) (Vehicles manufactured on and before 31st March, 2000) 4.5 9000
2 2 & 3 – Wheelers (2 –stroke) (Vehicles manufactured after 31st March, 2000) 3.5 6000
3 2 & 3 – Wheelers (4 –stroke) (Vehicles manufactured after 31st March, 2000) 3.5 4500
4 2 – Wheelers (2 –stroke) (Vehicles manufactured after 31st March, 2010) 3 4000
5 2 – Wheelers (4 –stroke) (Vehicles manufactured after 31st March, 2010) 3 3000
6 4-Wheelers manufactured as per pre Bharat Stage-II norms 3.0 1500
7 4-Wheelers manufactured as per Bharat Stage-II or Bharat Stage-III emission norms. 0.5 750