Diesel emmissions redux - 37/37 models tested spew "substanstially" more NOx - Page 1
Forum section: electronics / general

author: Delta
author_rank: Super Contributor
timestamp: April 22, 2016, 12:27:02 am
content: Not exactly a huge surprise maybe, but the Ministry of Transport tested the top 37 models of Diesel cars sold in the UK, andevery single one of themnot only exceeded its published test figures, but exceeded the maximum legal limit!Blimey, if you can't trust marketing blurb, what can you trust!

author: g.lewarne
author_rank: Regular Contributor
timestamp: April 22, 2016, 01:34:02 am
content: this is why the current road tax system in the UK is crazy. For those who do not know, Road tax was changed so cars manufactured after 2001 are now taxed on their manufacturer rated emissions. cars before 2001 are taxed on engine size.My car, manufactured in 1991, recently went through its MOT and looking at the emissions sheet, it barely registers on all the tests. The mechanic noted how clean the engine was running compared to pretty much every else more modern that he tests. And it isn't a small "city" car either.I think Road tax should be based on your cars actual, recorded and verifiable yearly emissions results that are part of the MOT anyway, not some arbitrary PR "enhanced" emissions testing under perfect conditions on a brand new engine

author: Brumby
author_rank: Unknown
timestamp: April 22, 2016, 01:46:29 am
content: Diesel vehicles do have an option to reduce emissions - add LPG.It's a system called "Dual phase". It increases power and reduces emissions.The concept is simple enough - just add a whiff of LPG to the mix, for example, through a carburettor style mixer in the air stream. It's been in use for years - on some big rigs and other vehicles as a post-production conversion.With today's computerised fuel management systems, that part of it can get challenging, but it's doable.

author: AndyC_772
author_rank: Super Contributor
timestamp: April 22, 2016, 06:47:55 am
content: Quote from: Delta on April 22, 2016, 12:27:02 amPrescribed lab testing != every possible real-world condition. Who'd have thought it?Quote from: g.lewarne on April 22, 2016, 01:34:02 amI think you're confusing carbon dioxide emissions, which are directly related to fuel consumption, and emissions of harmful pollutants which are actually tested as part of the MOT.

author: Someone
author_rank: Super Contributor
timestamp: April 22, 2016, 08:02:27 am
content: Quote from: Delta on April 22, 2016, 12:27:02 amTo be fair they are exceeding an arbitrary emissions benchmark under a different test, when the law says they only need to meet certain specifications in a specific test regime. Bad policy creates bad designs.

author: CJay
author_rank: Super Contributor
timestamp: April 22, 2016, 10:32:44 am
content: Quote from: Someone on April 22, 2016, 08:02:27 amAnd leaves us with public services that are tailored to meet the specified metrics but fail to provide actual value to the end user. I.E. public services designed to meet targets which may or may not be of any use to anyone but look great on paper.

author: Someone
author_rank: Super Contributor
timestamp: April 22, 2016, 12:00:13 pm
content: Quote from: CJay on April 22, 2016, 10:32:44 amyep, that sort of thing. Complex things are hard to distill down to simple metrics.

author: RGB255_0_0
author_rank: Frequent Contributor
timestamp: April 22, 2016, 12:03:52 pm
content: Quote from: CJay on April 22, 2016, 10:32:44 amI would sooner they spend the HSx money on broadband infrastructure

author: madires
author_rank: Super Contributor
timestamp: April 22, 2016, 12:29:48 pm
content: There will be more fun! The German minister of transport will present his test report this afternoon. And it seems that Bosch has built a lot of ECUs with fancy features for other car manufacturers too. The ministry of transport requested some feedback from Bosch, but Bosch declined citing "sensible legal/regulatory framework".