xraw/exhdry = amount of undiluted exhaust, without excess air, per mole of dry (raw or diluted) exhaust [mol/mol]
xraw/exhdry = quantité de gaz d &apos; échappement non dilués, sans excès d &apos; air, par mole de gaz d &apos; échappement secs (bruts ou dilués) [mol/mol]