The Professor discusses some of the chemistry behind the recent controversy involving Volkswagen cars. CLARIFICATION: While many diesel engines ...
========== You must almost certainly have heard
about the controversy over the car company Volkswagen and diesel engines
and nitrogen oxides. Now I don't want to talk about the
controversy but the chemistry is really interesting so I thought you ought to know about it.
The first thing to say is that this involves diesel engines. There are two sorts of engines that you
can have in cars. There're petrol engines and diesel engines and they use slightly
different fuel and the main difference between the engines is that in the
petrol engine there's a spark plug, which set fire to
the mixture of petrol or gasoline as you stay in the states and air. And the
flame spreads from the top of the cylinder downwards and pushes the piston. In a diesel engine there's no spark plug but the piston
going upwards ...