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.
Located 27 miles (43 km) east of Portland just off Interstate 84, the misty, white Bridal Veil Falls consists of a pair of quick cascades that are well worth the short but steep half-mile hike to the viewing platform. An upper trail also leads to cliffs that reveal great views of the Columbia River Gorge. Proceed another mile (1.6 km) east on the Historic Columbia River Highway. Also accessible via Exit 28 from I-84. Multnomah Falls, 30 miles east of Portland, is Oregonâs tallest waterfall.