Euro III
All models from2006 need to comply with Euro III emission regulations
as dictated by the new Australian Design Rule ADR 79/01
The strict new regulations enforce a significant reduction in
the production of harmful Hydrocarbon (HC) emissions from 0.6
grams per kilometre to 0.2 grams per kilometre, reducing Carbon
Monoxide (CO) from 4.0g/Km to 2.3g/Km, as well as reducing Oxides
of Nitrogen (NOx) to 0.15g/Km. Under the previous Euro II regulations
NOx levels were recorded within the Hydrocarbon output. The
catalytic converters must still perform above the regulations
for longer than 80,000km.
On Board Diagnostics
As a part of the Euro III standards, all vehicles must also
be fitted with a on-board diagnostics (OBD) system that constantly
monitors the emission control systems to ensure the vehicle
always complies with the regulations. The OBD is linked to the
engine management system with a number of sensors that monitor
the condition and performance of specific components related
to controlling the emission output. The OBD system measures
the emission output through the addition of an extra oxygen
sensor that monitors the operation of the catalytic converters
and provides more accurate control of the air-fuel ratio. If
either of the these sensors record an event that results in
emissions exceeding those prescribed under the Euro III regulations,
the OBD system logs the event within the ECU. If a similar event
occurs within the same driving period, or if the system detects
the issue when the engine is re-started, the driver is made
aware of a potential issue via the engine warning light on the
instrumental panel. |
