Vehicle transmission shift control apparatus using shift boundary lines based on vehicle speed, and engine intake air quantity or throttle or accelerator operation amount

摘要

A shift control apparatus for a vehicle automatic transmission, including: a device (96) for determining whether an intake air quantity (Q/N) per revolution of a vehicle engine (10) exceeds a predetermined threshold; a memory (100) for storing a first and a second shift control data map for shifting a vehicle transmission (12), 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 (58); a map switching device (96) 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 (96) for shifting the transmission, according to the selected first or second shift boundary lines.