Shift control apparatus for shifting up transmission upon re-acceleration following deceleration of vehicle

A shift control apparatus for an automatic transmission of a motor vehicle having an engine, including shift control means for automatically shifting the automatic transmission according to a predetermined shift control pattern, on the basis of a speed of the engine and a currently required output of the engine, the automatic transmission being placed in a selected one of a plurality of gear positions which include a low-speed gear position that is established by a shifting action including engagement of a one-way clutch, and a high-speed gear position that is established by a shifting action including engagement of a frictional coupling device, said low-speed gear position having a larger speed reduction ratio than said high-speed gear position, wherein the improvement comprises:

• idling speed control means for raising an idling speed of said engine to an elevated level which is higher than a normal level by an amount determined by an additional load applied to the engine, said idling speed control means maintaining said idling speed at said normal level when said additional load is not applied to said engine;
• and
• shift-down point changing means for shifting, in response to a rise in said idling speed to said elevated level by said idling speed control means, a shift-down point of said speed of the engine which is defined by said predetermined shift control pattern and at which the transmission is shifted down from said high-speed gear position to said low-speed gear position, said shifting of said shift-down point being from a first shift-down point corresponding to said normal level of the idling speed up to a second shift-down point corresponding to said elevated level.