Decades of diesel use in Europe have created a public health crisis

Re:Decades of diesel use in Europe have created a public hea... by vkou on Wednesday October 09, 2019 @11:21AM (#21204048)

It's also worth noting that the reason to prefer diesel over gasoline is fuel efficiency. Diesel engines are more efficient than gasoline ones. Engines that run hotter are also more efficient - but the hotter your engine runs, the more NOx it produces.

Catalytic converter a pull most of the NOx out of a gasoline engine's exhaust, but don't work on diesels. Urea traps are an alternative, but an expensive one.

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Re:Decades of diesel use in Europe have created a public hea... by briffle on Wednesday October 09, 2019 @11:53AM (#21204365)

Modern Diesels have some other tech to help lower the NOx levels (like EGR and SCR systems) but the main problems are that older cars didn't have such systems, plus, for many years, VW lied and faked data, partly to avoid having to implement SCR (saving thousands per car, and the re-engineering) and partly to say the cars were cleaner than they were.

Moden SCR systems (they inject DEF, aka, urea, into the exhaust) do a really good job getting rid of NOx.

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Re:Decades of diesel use in Europe have created a public hea... by llampx on Wednesday October 09, 2019 @12:13PM (#21204581)

Pardon me if I don't believe what the auto industry is feeding us.

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