| 摘要 |
A managing method of noxious exhaust gas is provided to prevent malfunction of an exhausting management system of noxious gas by considering a low vaporizing state or a high vaporizing state in addition to normal fuel supply. A managing method of noxious exhaust gas comprises: a first step of determining a catalyst heating stage(S250); a second step of calculating difference of nth engine rpm and (n-1)th engine rpm when a vehicle is turned on, if not in a catalyst heating stage as a determined result of the first step(S260); a third step of determining low vaporizing fuel(S280) if the rpm difference is less than 50 rpm as a calculated result of the second step(S270); a fourth step of measuring idling stability if in a catalyst heating stage as a determined result of the first step(S340); a fifth step of determining high vaporizing fuel(S355) if the idling stability is less than -20% as a measured result of the fourth step(S350); a sixth step of measuring fuel supplying stability if the idle stability is more than -20% as a measured result of the fourth step(S360); a seventh step of determining low vaporizing fuel(S380) if both the idling stability as a measured result of the fourth step and fuel supplying stability as a measured result of the sixth step are more than 20%(S370); and an eighth step of determining an operation of MIL if both the idling stability as a measured result of the fourth step and fuel supplying stability as a measured result of the sixth step are not more than 20%(S460).
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