Understanding EGR Valves: Their Role and Function in Engines
EGR Valves: An Overview EGR valves have undergone significant development since their initial application in diesel engines in the 1970s. In the early days, EGR was primarily used to reduce particulate matter (PM) emissions by lowering combustion temperatures and pressures. However, as environmental regulations became more stringent, the focus shifted towards reducing nitrogen oxides (NOx) emissions. The key to understanding how EGR valves reduce NOx emissions lies in the principles of combustion....