i 1 (motores a GN) (7) NMHCmass = ∑= (M × 0,000479 ) − (M n TOTW, i × NMHC conce,i TOTW × NMHC concd × (1 − 1/DF ) × 0,000479 ) i 1 (motores diesel) (8) NMHCmass = ∑= (M × 0,000502 ) − (M n TOTW, i × NMHC conce,i TOTW × NMHC concd × (1 − 1/DF ) × 0,000502 ) i 1