Vehicle transmission shift control apparatus having means for su

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36442402, 477 97, 477120, 477902, G06F 1550, G06G 770

Patent

active

053412958

ABSTRACT:
An apparatus automatically shifts a vehicle transmission, according to a shift pattern and on the basis of a detected parameter of the pattern. The shift pattern or the detected parameter is compensated by a compensating coefficient determined from an actual intake air quantity of the engine, and a required intake air quantity calculated from the throttle opening and the engine speed. The apparatus includes an arrangement for adjusting the compensating coefficient so as to prevent busy shifting actions of the transmission upon changing of the throttle opening, or an arrangement for determining the compensating coefficient so as to reflect the driver's desire for accelerating the vehicle, preferably depending upon the vehicle running condition. An arrangement adjusts compensating coefficient so as to reduce an influence of errors in the required and actual intake air quantity, or an influence of chronological change of the engine, or prevent unnecessary shift-up action of the transmission when the air conditioner is on. A further arrangement replaces the calculated compensating coefficient by a lower or upper limit or a standard value if the calculated coefficient is abnormally small or large.

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patent: 5101350 (1992-03-01), Tokoro
patent: 5184293 (1993-02-01), Middleton et al.
patent: 5197325 (1993-03-01), Tamura et al.

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