Scania reveals real world emissions testing


Truckmaker says emissions monitoring has occurred in traffic for last three years

Scania reveals real world emissions testing
Scania emissions test engineer Sven Andersson.

 

As the Volkswagen emissions scandal has grown to encompass other automotive brands within the group, truck maker Scania has revealed the real world emissions testing that the company uses to ensure Euro 6 compliance in its heavy trucks.

The company uses three trailer mounted mobile test laboratories to monitor emissions on public roads.

"With these labs we can check the emissions from at least 50 vehicles per year," Scania emissions test engineer Sven Andersson says.

"Most of the tests are conducted on prime movers to which we can attach the trailer with the mobile test lab. But we can also use these labs for rigid trucks as well as buses and coaches."

Before the introduction of Euro 6 emissions regulations in 2013, heavy vehicle manufacturers could use stationary lab based test rigs to monitor emissions compliance.

However, from 2013 onwards, heavy vehicle emissions are required to be carried out in normal every day traffic conditions.

The trucks being tested are also loaded to 50- 60 per cent of their rated payload.

"We perform on-road analyses on at least one customer vehicle per month," Andersson says.

"We test vehicles during the development and production phases as well. We also test trucks in our own transport operations."

The test engineers then aim to emulate real world driving conditions.

"This means we drive on city, rural and highway roads," Andersson says.

"The idea is to measure emissions in normal traffic under normal conditions."

For the test, a lab trailer is hooked up to a prime mover. It is then connected to the vehicle’s on-board diagnostics system and an exhaust gas analyser is mounted on the exhaust.

 

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