Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

See what you’re spewing as you speed along

06.08.2007
Device in exhaust could allow drivers to monitor emissions

In future drivers may only have to glance at the dashboard to see the pollution spewing out of their vehicle’s exhausts.

A team from The University of Manchester has constructed a laser measuring device capable of recording levels of carbon dioxide, carbon monoxide and methane from directly inside an exhaust.

Once optimised, the process could be incorporated into onboard diagnostic systems that would monitor emissions as vehicles drive along – and potentially help people reduce their emissions by adjusting their driving style.

Reporting in the Optical Society of America’s journal Applied Optics, academics claim this approach is faster and more sensitive than the extractive techniques normally used to monitor emissions.

In an MOT test, for example, exhaust emissions are extracted into a box while the engine is idling and the gases present are then measured.

The University of Manchester team employed a device known as a ‘near-IR diode laser sensor’ to measure the variation in gas concentration during changes in the operating conditions of a Rover engine, such as increasing and decreasing the throttle, adjusting the air to fuel ratio, and start-up.

“This is the first instance of this type of near-IR diode laser sensor being used directly in the exhaust of a static internal combustion engine to measure emissions,” said Dr Philip Martin, one of the paper’s authors.

The team say the components for the device are readily available and the near-IR technology allows highly accurate readings to be taken and also cuts out interference.

In the studies reported in Applied Optics, the near-IR device used two diode lasers operating at different frequencies; one detecting carbon monoxide and carbon dioxide and the other detecting methane.

The team measured the emissions produced by a Rover K-series car engine mounted on a test bed – but they have also taken the process outside the laboratory and measured exhaust emissions in passing vehicles.

“Components handling the high sensitivity and robustness required to apply this approach in the real world are only now becoming available,” added Dr Martin. “We have already constructed a battery-powered roadside unit using the same technology, employing rugged and robust telecommunications components.”

The next steps will be to fully quantify the technique and add additional lasers for other key emissions such as nitrogen oxide, nitrogen dioxide and specific hydrocarbons.

Dr Martin, who is a co-founder of University spin-out company TDL Sensors, says the technology could also potentially be used in roadside congestion charging systems, with less polluting vehicles being charged less.

Jon Keighren | alfa
Further information:
http://www.manchester.ac.uk

More articles from Automotive Engineering:

nachricht 3D scans for the automotive industry
16.01.2017 | Julius-Maximilians-Universität Würzburg

nachricht Improvement of the operating range and increasing of the reliability of integrated circuits
09.11.2016 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH

All articles from Automotive Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>