## Friday, April 26, 2013 ... /////

### Hyundai ix35 unfit for suicide by CO2

All the media have informed about the following Hyundai ad that was quickly suspended:

The man tries to commit suicide by inhaling the gases from the exhaust pipe. But Hyundai ix35 only has "water emissions", whatever it exactly means, so he fails.

Understandably, some people – including surviving dependants of people who did commit suicide in a car – were upset. Well, suicides are present on the maternal side of my DNA chain but I wasn't offended. Instead, the video looks boring to me. It had to be very cheap to shoot it, too.

Also, it seems clear to me that well over 99 percent of drivers don't care whether it's possible to commit suicide with the help of the exhaust gases – or whether they contain CO2 at all (how much you pay for the gasoline obviously does matter, however). Of course that too high a concentration of the friendly gas known as CO2 – above 20,000 ppm (2%) or certainly 50,000 ppm (5%) – is toxic but there is an easy way to avoid the risk: either take the exhaust pipe out of the cabin or open the window. ;-)

I do love some car commercials. Sweet cake car Škoda is great, and so is mean green Škoda. In the U.K., lots of various cool Škoda advertisements are created.

That's also true for India where Škoda is a more valuable brand than Mercedes. It's very funny to see this exotic ad featuring something as unexotic as a Škoda car.

You may think that this selection of car adverts significantly overrepresents Škoda cars but you might be wrong. ;-)

This is what Britain's 10 most favorite cars look like. Škoda models occupy three spots out of ten, including the first, the second, and the sixth. The remaining seven spots are divided among seven companies. Despite the great supervision, no other VW Group subsidiary (or parent) has made it to the top ten.

If you're interesting in business in Czechia – and I realize it is extremely unlikely – you should know that amazon.com plans to open 1st-2nd Europe's greatest logistical center somewhere in Czechia by the end of the year. The runnerup was Poland; the other largest center in Europe is somewhere in Germany (Bad Hersfeld).

Almost 1/2 of the loss-making Czech Airlines was bought by Korean Airlines. That could be helpful for them, especially if their Northern pals destroy their national air fleet. ;-)

#### snail feedback (11) :

When it was time for my father to get rid of the old VW van last year, I did some homework (OK... about 30 hours of it) and found the Škoda Yeti (1.2TSI front-wheel drive) to be the best value for money and the best fit for his needs and declining mobility.

The Yeti drives better than most small hatchbacks while providing generous load space. It's a lot of fun to drive and with all the safety features such as brake assistance and ABS, will go a long way towards providing enjoyment through the freedom of movement.

The Yeti is very pretty. I bought the Octavia last year and it is a pleasure to drive, and lots of space including the boot (I could feet a deer in it). ;-)

A tried of ours bought an Octavia because he wanted to carry a double bass.

Of course the killer gas in exhaust fumes is not CO2 but CO.

An extremely good point if true. Are you sure that the amount of CO is sufficient? CO comes from imperfect burning - are the motors imperfect enough?

CO, along with HC and NOx is converted by the catalytic (cataclysmic?) converter during normal operations. The engine management system adjust combustion parameters so that there exhaust gases are within the "conversion window". Ideally, you get nothing but CO2, H20 and N2 out the end of the converter.

However, a cold engine or (until quite recently) one under wide-open-throttle is not "managed" with the same objective. It's usually optimised to keep the engine running and to heat up the exhaust system as quickly as possible to allow the catalystic converter to work. A "rich" mixture, which contains more fuel than is stoichiometricallt required, is easier to ignite, but that will result in both HC and CO emissions being high during warmup.

Is that too much information or should I continue for another few hours? ;-)

It's difficult to achieve dangerous CO levels with a properly functioning, modern engine. CO mixture for (warm) idle is set at below 2% during "tuning", which is approximately a quarter of the level of lethal toxicity for humans. It will give you a hell of a headache and can make you vomit ... but it'd take many long hours of discomfort to kill; especially in a large space.

The CO2 that also comes out of the exhaust will be far more plentiful and will probably *asphyxiate* before CO poisoning.

Back in the old days when we had proper refrigerants in airconditioning systems, one could bleed the refrigerant to the engine intake and have phosgene gas pouring out of the tailpipe.

While you need very high concentrations of CO2 to kill, and also CO2 easily washed out from the body, even small concentrations of CO will build up in the body, as it binds strongly to haemoglobin (oops earthquake ongoing right now) and makes more and more of it useless as O2 And CO2 carrier. It also binds strongly to the cytochromes of cell respiration.

So, small environment CO levels will build up in haemoglobin and stay stuck to it for hours.

It looks like Disqus lost my response.

In short, CO binds strongly to haemoglobin, so small air concentrations build up in the body. So haemoglobin stops carrying the usual gases and more and more of it becomes uselessly tied to CO..

CO2 binds weakly, so that it is easily washed out, and you need (relatively) high air concentrations to get an effect.