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 Post subject: Re: The Diesel Debate
PostPosted: Wed Oct 18, 2017 11:06 am 
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Just to resurrect an old thread....

An interesting take on the debate of older vehicles (and petrol v diesel) is here:
http://www.bbc.co.uk/news/resources/idt ... ar_exhaust

They tested two cars, and found that the old diesel emitted less NOx than the old petrol car. Of course, this is only two cars, so in that sense is not a conclusive result. But the tests themselves seem far more representative than the official tests, as they were actually taken on the roads.

The "old" Skoda (diesel) emitted less NOx than the average Euro6 diesels in these tests, whereas a Euro6 would pass the standard test.

Anyway, the article is worth a read, as there are more details in it.

Just a shame there were no data on the particulates (testing problem).


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 Post subject: Re: The Diesel Debate
PostPosted: Wed Oct 18, 2017 12:32 pm 
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It's the particulates that's the basis of the newest environmental scam. "PM2.5" I believe they call it.

Recent headlines stated that over 500,000 deaths across Europe can be attributed to PM2.5 and, you can guess what'll come next - high taxation on anything that emits PM2.5.

Not only will this encompass diesel engined vehicles, wood stoves will be part of it.

Not to worry - all the medical ills and environmental damage caused by PM2.5 can be 'cured' by the liberal application of your hard earned money in the form of more taxes........

The new 'Global Warming'.......

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 Post subject: Re: The Diesel Debate
PostPosted: Wed Oct 18, 2017 2:35 pm 
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Well the good news in the above article here:
Quote:
Last month the European Union began its Real Driving Emissions (RDE) test on all new cars.


Further reading here:

http://www.theicct.org/sites/default/fi ... 017_vF.pdf

Meaning that new diesels will eventually have to comply with RDE tests after an initial period of getting within 2.1 times the limit.

For older models.... personally, they should put the tax on the fuel. So if you hardly drive it, you're not emitting the NOx/PM2.5s/CO2.

As for stoves: They can hardly tax us on a stove we already have, given I don't actually pay for the fuel.

If you live in London, I can see people being banned from driving a diesel in certain areas, or having a stove. But elsewhere, where the issues are less onerous, it wouldn't make sense.


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 Post subject: Re: The Diesel Debate
PostPosted: Wed Oct 18, 2017 3:07 pm 
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I can only assume that politicians often get driven in their own cars, because if they drove themselves they'd be wildly swinging from one side of the road to the other. (I imagine they must actually drive cars powered by magic dust, although I expect the fairies get upset about that. . .)

First they wanted us all to drive diesels, to cut down on that evil, nasty CO2! (Swerve into the right gutter)
Now they want us to stop driving diesels because of the particulates. (Meander back into the left gutter)

I wish they'd make their expletive minds up! (And stop driving as I seem to see more and more people aimlessly swerving about)

PS. They can charge what they like to drive in London as far as I'm concerned. I won't be driving there. Or going there for that matter.


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 Post subject: Re: The Diesel Debate
PostPosted: Mon Dec 25, 2017 12:44 pm 
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My issue with the slow banning of diesels in favour of modern, direct injected fuel cars, is that these use a bit of Diesel cycle in their Otto - thus emit particulates, that they are not tested for.

But the problems with diesel particulates is something the industry has brought upon itself.
Diesels are the happiest and easiest to control at constant speed. The idea is to run them in a zone with little particulate emmission, and to vary the load.
The result is a diesel electric that is stupidly easy to hybridise for even lower emissions.

But cars and trucks need gears and to go vroom vroom, no idea why, probably tradition.
Yes there is a loss, of about 5% in energy transmission, but a gear typically has a 2% loss - in top gear you have one or two sprogs and the diff so between 4 and 6%.

Some Japanese or Chinese company will probably beat us to the punch to diesel electric or cost competitive full electric while we sit on our hands remenissing about the Rover Stirling V6 and cheap North Sea fuel.


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