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Exhaust gas recirculation (Qpwe)

Vehicles and equipment (Q)
    Vehicle components (Qp)
         Related Term (Associative): 
        Emission control systems (Qpw)
             Related Term (Associative): Pollutants (Jfgs); Pollution control (Jfgy)
            Exhaust gas recirculation (Qpwe)
                 Related Term (Associative): Exhaust gases (Jfgsge); Fuel consumption (Jnruef); Nitrogen oxides (Rbcgnru)
            Positive crankcase ventilation systems (Qpwp)
            Selective catalytic reduction (Qpws)
                 Related Term (Associative): Exhaust gases (Jfgsge); Fuel consumption (Jnruef); Nitrogen oxides (Rbcgnru)
            Exhaust system components (Qpwx)
            Emission control devices (Qpwy)