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New Emissions Analytics study suggests pollution from tire wear now 1,850 times worse than exhaust emissions

Green Car Congress

In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions ( earlier post ). As a result, distance-specific mass and number emissions can be derived, which can then be compared to equivalent tire metrics.

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IAV develops new close-coupled diesel exhaust gas aftertreatment system for improved emissions reduction

Green Car Congress

IAV has developed a particularly closed-coupled diesel exhaust gas aftertreatment (EAT) system. A key contribution to this performance must come from the exhaust gas aftertreatment system—across the entire speed and load range. This way, exhaust gas flows through DOC and SCRF before it enters the turbine.

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Mercedes-Benz targeting average diesel NOx of ~30mg/km in RDE Stage 2 tests by 2020; approaching 20mg in following years

Green Car Congress

This is made possible by an innovative package of combining engine technology and exhaust-gas aftertreatment, which has been introduced consistently over the past two years as part of the new generation of engines and is continuously being developed further. Mercedes-Benz now offers this technology in all current vehicle classes.

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Bosch says it has solved diesel NOx problem; as low as 13 mg NOx/km even under RDE; refining existing technologies

Green Car Congress

But even today, vehicles equipped with Bosch diesel technology can achieve as little as 13 milligrams of NO x in standard legally-compliant RDE cycles. A dynamic driving style demands an equally dynamic recirculation of exhaust gases. To ensure optimum NO x conversion, the exhaust gases must be hotter than 200 degrees Celsius.

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EC fines automakers $1B for colluding on technical development of NOx aftertreatment systems

Green Car Congress

According to the Commission, the car manufactures held regular technical meetings to discuss the development of the selective catalytic reduction (SCR)-technology which reduces NO x emissions from diesel passenger cars through the injection of urea (also called AdBlue) into the exhaust gas stream.

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ICCT study concludes no technical barriers to use of higher blends of ethanol

Green Car Congress

The consumption scenarios are technically achievable but do not reflect significant barriers such as cost, regulation, legality, and consumer acceptance. Theoretically, cars operating on higher ethanol blends than the design point could emit greater concentrations of pollutants in exhaust gas. Source: ICCT. Click to enlarge.

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Faurecia acquires Amminex to accelerate efficient NOx reduction for passenger and commercial vehicles

Green Car Congress

ASDS is a system for ammonia storage and delivery that is used to activate the SCR catalysts used on diesel vehicles to remove NOx from the engine exhaust. A 100-gram cube of the material can fit into the palm of a hand yet contain up to 50 grams of solid ammonia—the equivalent of 60 litres of ammonia gas.