biggest locomotive in the world

If in a very room or building, Claustrophobia sufferers may constantly be checking for doorways and exits or standing near exits even during large rooms, and feeling fear when doors are closed. Smalls spaces like cars, planes and lifts ca also bring anxious feelings. In some cases being in these situations can bring on panic disorder, in extreme cases just going to a closed door may cause a Panic Attack. The EGR system routes a number of the exhaust gases (6 ? 10%) through the EGR valve, back in for the Intake System, and finally inside combustion chamber. The exhaust gases are inert i.e. they do not burn inside the combustion chamber; also, the exhaust gases occupy a few of the space which may otherwise be taken from the intake air. This cuts down on level of intake air readily available for the combustion process during each Power Stroke; which often decreases the peak combustion temperatures. This ends in lower NOx emissions.