Method of suppressing gear-shifting shock in an automatic-transm

Boots – shoes – and leggings

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74866, 74859, B60K 4104

Patent

active

052726320

ABSTRACT:
In a vehicle provided with an automatic transmission, gear-shifting shock is suppressed by changing the engine output power in response to a gear-shifting. The change in the engine output power is terminated when the actual engine speed reaches a completion decision engine speed, which is determined so that it corresponds to the time when the gear-shifting is completed, which is based on the fact that the engine speed changes according to a certain characteristic curve during the gear-shifting. The engine speed at which the gear-shifting is actually completed is detected for each gear-shifting according to the change in the rotational speed of the engine during the gear-shifting, and the completion decision rotational speed for each gear-shifting is set through learning on the basis of the preceding engine speed at which the gear shifting was actually completed.

REFERENCES:
patent: 4744031 (1988-05-01), Takeda et al.
patent: 4783743 (1988-11-01), Yashiki et al.
patent: 4868753 (1989-09-01), Mori
patent: 4933851 (1990-06-01), Ito et al.
patent: 4953090 (1990-08-01), Narita
patent: 5012695 (1991-05-01), Kyohzuka et al.

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