Soot sensors for efficient combustion and low emissions - SootSensII

• Nanosized soot particles are a serious health hazard in urban air. Upon inhalation they can penetrate deep into the lungs and their fat solubility makes possible their accumulation in other organs such as the brain. For this reason legislation has continuously reduced the allowable emission levels and raised requirements for reporting the status of the exhaust system (OBD, on board diagnostics) in diesel powered vehicles. To meet the California Air Resources Board proposed legislation for diesel particulate filter, 17.5 mg/mile for light duty vehicles after 2013, will require the development of new sensors for monitoring the exhaust and in particular the status of the particulate filter. The objective in this project was to further optimize the soot sensor based on thermophoresis, that is a cold sensor surface, for improved sensitivity (patent filed) and to test transistor based sensor structures. The goal was to perform proof of concept of thermophoretic soot sensors in order to get sensor manufacturers to pick up the technology and car manufacturers to implement it. Another goal was to develop an aerosol based soot generation system, by which soot sensors can be tested and calibrated in the laboratory before expensive testing in car and truck engines.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Produktionsteknik, arbetsvetenskap och ergonomi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Production Engineering, Human Work Science and Ergonomics (hsv//eng)

Nyckelord

Soot

sensor

resistivity measurements

thermophoresis

aerosol technology

diesel exhausts

thermal management

simulation

FET sensors

packaging

sensing layers

Publikations- och innehållstyp

rap (ämneskategori)

vet (ämneskategori)