Exhaust Heat Recirculation. The key to exhaust heat recirculation is a device called an exhaust gas recirculation (EGR) valve. The EGR valve opens when it encounters back pressure from the car's exhaust and channels it back into the combustion chamber.You might wonder what good this does, since the air in the chamber is mixed with gasoline to make it combustible.Well, one thing it does is to make the fuel warmer.xhaust Heat Recirculation. The key to exhaust heat recirculation is a device called an exhaust gas recirculation (EGR) valve. The EGR valve opens when it encounters back pressure from the car's exhaust and channels it back into the combustion chamber.
Fagrifoss is a waterfall on the way to laki route is very rough and rugged. There are at least two river crossings to get there. 4Ã4 vehicles only. The 25 km long crater row called Lakagigar was created during a relatively short, intensive, and catastrophic eruption between the 8th of June 1783 and February 1874.
Tugela Falls in South Africa are currently recognised as the world's second highest waterfall in terms of overall height (although there are doubts over the measurement of the Angel Falls, regarded as the highest â see Highest Waterfall in the World). Without doubt Tugela are, however, the tallest waterfalls in Africa. Located in the Drakensberg in the Royal Natal National Park in KwaZulu-Natal Province, they are one of the more accessible of Africaâs great waterfalls. The total drop in five leaping cascades is 948 metres.