Vehicle transmission shift control apparatus using shift boundar

Details Vehicle transmission shift control apparatus using shift boundar Vehicle transmission shift control apparatus using shift boundar

1992-05-29

1993-07-13

Lorence, Richard M.

Machine element or mechanism

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

Preselected indexed position

3644241, B60K 4106

Patent

active

052263517

ABSTRACT:
A shift control apparatus for a vehicle automatic transmission, including: a device for determining whether an intake air quantity (Q/N) per revolution of a vehicle engine exceeds a predetermined threshold; a memory for storing a first and a second shift control data map for shifting a vehicle transmission, the first shift control data map representing first shift boundary lines each representing a relationship between the vehicle speed (SPD) and the intake air quantity, while the second shift control data representing second shift boundary lines each representing a relationship between the vehicle speed and a shift control parameter (TA, PA) which reflects an operation amount of an accelerator pedal; a map switching device for selecting one of the first and second shift control data maps, the map switching device replacing the first shift control data map by the second shift control data map when the intake air quantity exceeds the predetermined threshold; and a device for shifting the transmission, according to the selected first or second shift boundary lines.

REFERENCES:
patent: 4539868 (1985-09-01), Habu
patent: 4677556 (1987-06-01), Habu
patent: 4939957 (1990-07-01), Asano et al.
patent: 5003950 (1991-04-01), Kato et al.
patent: 5107724 (1992-04-01), Takizawa

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