| 摘要 |
PCT No. PCT/EP85/00512 Sec. 371 Date May 23, 1986 Sec. 102(e) Date May 23, 1986 PCT Filed Oct. 2, 1985 PCT Pub. No. WO86/02112 PCT Pub. Date Apr. 10, 1986.Automatic shift of a gear transmission under speed and load control between high and low drive ratio limits of a shift range, is effected in accordance with different sequential step change shift patterns selected from program storage. Different ones of the available drive ratios between the high and low limits of the shift range are skipped in the various shift patterns respectively corresponding to different travel loading conditions of a vehicle. Automatic shift operation is effected in accordance with the shift patterns selected to reduce the number of drive ratios utilized, such selections being made in accordance with the vehicle travel loading conditions.
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