Control apparatus for an automatic transmission

Details Control apparatus for an automatic transmission Control apparatus for an automatic transmission

1981-04-28

1986-12-02

Leppink, James A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

364424, B60K 4104

Patent

active

046255907

ABSTRACT:
The desired acceleration, a value required to determine shift points in an automatic transmission, is computed on the basis of the measured speed, output torque of the transmission, and the tractive resistance at rated load on a level road. Additionally, a shift which is otherwise indicated is suppressed when the computed output torque of the transmission in the new gear is less than the actual tractive resistance. Preferably an incremental value is added to the tractive resistance prior to comparison with the output torque in the new gear, so that hunting is prevented. The incremental resistance value, which is added to the tractive resistance, may be a constant or may vary as a function of speed.

REFERENCES:
patent: 4044634 (1977-08-01), Florus et al.
patent: 4335428 (1982-06-01), Miki et al.

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