Characteristics correction system for automatic transmission

Details Characteristics correction system for automatic transmission Characteristics correction system for automatic transmission

2004-03-17

2008-12-23

Lewis, Tisha D (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Including fluid drive

C701S059000

Reexamination Certificate

active

07468016

ABSTRACT:
In a property correcting system of an automatic transmission according to the present invention, a difference of revolutions between input revolutions Nin of a torque converter and turbine revolutions Nt is compared with target rotational difference ΔN, and is increased/reduced by the feedback operation (S6and S7). It is checked to see if the difference of revolutions is converged to the target rotational difference ΔN (S8). When a driving duty duty which is converged to the target rotational difference ΔN is within a shipping determining standard, the value is stored (S10). A differential value between the stored driving duties duty of the respective automatic transmissions and the reference value is written to a TCU, as the amount of correction of the respective automatic transmissions, thereby correcting the variation in properties of the individual automatic transmissions, starting from the initial shipping timing. A preferable shift quality is obtained without prompting the learning based on the actual driving.

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Official Action issued to Japanese Patent Application No. 2003-076131 having a mail date of Oct. 19, 2007 (w/translation).

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