| 摘要 |
In a control system for a spark advance engine (10), a basic spark advance value is calculated from values stored in a memory (35). An adjustment value is calculated in an adjustment device (43) and a perturbation value is set by a perturbation generator (46). The basic, adjustment and perturbation values are summed and supplied to a dwell control device (17). The sum of the adjustment and perturbation value together with a value indicative of engine torque are supplied as inputs to a parameter estimator (40). This estimator (40) uses these two input values to estimate two parameters which together define the relationship between spark advance angle and torque. The two estimated parameter values are supplied to the adjustment device (43), which uses them to calculate the adjustment value using a predetermined rule. Thus, the spark advance angle is quickly adjusted to an optimum value.
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