| 摘要 |
PURPOSE:To secure idling stability as well as prevent exhaust gas from deteriorating, by installing a judging device, judging an idling state, and also a lean monitor level selecting device which makes a lean monitor level in time of idling go up to the specified level. CONSTITUTION:An oxygen sensor 13 emits a signal commensurate to oxygen content in exhaust gas out of an internal-combustion engine 1. An idle switch 16 judges of whether the internal-combustion engine 1 is in an idling state or not. When the internal-combustion engine 1 is in the idling state, a lean monitor level selecting device of a microprocessor 8 makes a lean monitor lever go up to the specified level by degrees. Thus, idling stability is secured and any deterioration in the exhaust gas is preventable. |
