EGR does NOT have any effect on Air Fuel ratio
EGR does not have any effect on Air fuel ratio
EGR does NOT make the system richer
EGR does NOT make the system leaner
EGR dilutes the air fuel / mixture with an INert gas , dilution does not change the ratio of air to fuel in the Air Fuel Mixture
because EGR is INert it does not combine with the air Fuel mixture
EGR takes up space
EGR reduces the available DISPLACEMENT of the engine but not the physical size .
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