| 摘要 |
PROBLEM TO BE SOLVED: To detect an exact throttle opening by holding a voltage value surely in time of the full-close of a throttle learned without performing any battery backup. SOLUTION: After an ignition switch has come to a state of being turned on, a span of the specified time tαelapses, and the mean value of a throttle opening detection signalθwithin the specified time, at a time when engine speed is less than the specified value nE and such the specified full-close condition that wheel speed is zero in all or the like is satisfied, is set up as a learning full-close valueθt , and then a full-close reference valueθ* is gradually followed by a predetermined variationΔθso as to make it accord with this learning full-close valueθt . In succession, when the learning full-close valueθt and the full-close reference valueθ* are accorded with each other, the learning full-close valueθt , namely, the full-close reference valueθ* is renewably stored in a reference value memory 34d1 as this time storage full-close valueθM, and henceforward, any renewal storage into the reference value memory 34d1 is not carried out.
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