EGR valve
noun Automotive.
See under exhaust-gas recirculation.
Definition for egr valve (2 of 2)
exhaust-gas recirculation
[ ig-zawst-gas ]
/ ɪgˈzɔstˌgæs /
noun Automotive.
a method of returning part of the exhaust gases to an engine by means of a valve (EGR valve) in order to reduce the combustion temperature, which leads to a reduction in the formation of pollutants. Abbreviation: EGR