| 摘要 |
PURPOSE:To stably control the idle rotation without using an oil temperature sensor by attenuating a target rotation toward the target rotation at the warm- up completion time at a rate in response to the cooling water temperature at the start time when the cooling water temperature reaches a predetermined temperature. CONSTITUTION:After an internal-combustion engine 21 is started, the output signal of a water temperature sensor 40 is fed to an arithmetic processing circuit 34, and the attenuation D1 of a target rotation is read out from a preset memory based on the cooling water temperature. Next, whether the cooling water temperature is a predetermined value or more to judge the warm-up completion is judged, and if YES is judged, whether it is transiting to the idle target rotation after the warm-up is judged. If YES is judged here, the attenuation D1 is subtracted from the target rotation to attenuate the target rotation. Next, this target rotation is compared with the actual rotation, and an idle speed adjusting means is controlled based on the difference. On the other hand, when the cooling water temperature is a predetermined value or less, the said adjusting means is controlled in response to the target rotation read out based on the water temperature. |
