BMW M67 - Exhaust Emission Legislation; Exhaust Emission Limits

DI Diesel Engines M57/M67 - Common Rail Sec. 1 P.9
Course contents/Background material
Exhaust emission legislation
Pollutant limits have been further reduced in exhaust emission
guidelines. These limits for EU-3 will come into force as from
01.01.2000 for new type approvals.
Pollutant EU-2 EU-3 EU-3 D
Since 1996 As from Since
approx. 2000 01.07.97
CO 1.00 0.64 0.60 g/km
(NO
x
+ 0.70 0.56 0.56 g/km
HC)
(0.90)*
PM
0.08 0.05 0.05 g/km
(0.10)*
PM: Particle mass
*) Different limits applied in part to direct injection diesel engines
Tab. 1: Exhaust emission limits for diesel engines
The DI engines fulfil the more stringent requirements specified in
the exhaust emission guidelines by means of the following
measures:
• Internal engine measures
• Controlled exhaust gas recirculation (EGR) φ ι (refer to Sec. 8)
• Catalytic converter φ ι (refer to Sec. 8)
• Common rail (adaptation of injection characteristics)
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