| 摘要 |
A gear decision system for an automatic transmission which compulsorily decides in a no-load state only for a predetermined time period to avoid an erroneous decision even if a start decision result is not identical to a starter behavior during cranking and a no-load switch represents an in-gear state. The system comprises a sensor 8 for outputting a reference signal CA, a sensor 17 for sensing a turbine speed Rt, a switch 19 for outputting a signal NL indicative of a no-load state on the basis of a shift lever position, a unit 21 for deciding on an engine stopping state on the basis of the reference signal CA, a unit 22 for comparing the turbine speed Rt with a first set value, a unit 23 for deciding on a speed change state on the basis of the reference signal CA, the signal NL and the turbine speed Rt, a unit 24 for deciding on a starting state, and a unit 25A for deciding on an in-gear state on the basis of the decision results E, H, G and St and the signal NL. When the in-gear state is indeterminable, a decision is made, over a predetermined time period, that the automatic transmission is in the out-of-gear state.
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