The name Minneapolis is attributed to Charles Hoag, the city's first schoolteacher, who combined mni, a Dakota Sioux word for water, and polis, the Greek word for city.
EGR valve on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines. EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders.
Cummins West Training Center. EGR Mixer. â¢ The exhaust gas recirculation system requires a mixing. device to combine the recirculated exhaust gas and the. charge air from the charge air cooler. The mixer insures. an equal mixture of recirculated exhaust gas and fresh. charge air to all cylinders.