| 摘要 |
An idle speed control system includes a bypass throttling device coupled in parallel with the primary engine throttle. At the beginning of each idle speed control period, a controller generates an initial bypass throttle position from a desired or reference engine speed. Correction of this initial position is provided based upon a learned error between initial bypass throttle position and the actual position which is maintained by feedback control. The learning routine is enabled in response to an indication that the quantity of inducted fuel vapors is below a minimum value.
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