Patent ID: 8972127
Filing Date: 2015-03-03
Classification: F16H,Y10T

Abstract:
1. A control system for an automatic transmission, including: a detecting portion of detecting a driving information including a temperature of an engine coolant, a temperature of a transmission oil, a positional change of an accelerator pedal, a current shift-speed, and a driving speed; a control portion determining a virtual positional change of the accelerator pedal based on an actual positional change of the accelerator pedal and a tip-in speed transmitted from the detecting portion, to determine a target shift-speed according to the actual positional change of the accelerator pedal or the virtual positional change of the accelerator pedal and the driving speed, and to control a shift to the target shift-speed; an actuator engaging the target shift-speed according to a control signal received from the control portion; a memory portion storing a map in which the virtual positional change of the accelerator pedal according to the actual positional change of the accelerator pedal and the tip-in speed is set, a first shift pattern map in which the target shift-speed according to the actual positional change of the accelerator pedal and the driving speed is set, and a second shift pattern map in which the target shift-speed according to the virtual positional change of the accelerator pedal and the driving speed is set; wherein the control portion detects the actual positional change of the accelerator pedal and the tip-in speed when the temperature of the engine coolant exists within a predetermined first temperature range, the temperature of the transmission oil exists within a predetermined second temperature range, and the current shift-speed is higher than or equal to a third forward speed; and wherein the control portion performs a shift control by applying the second shift pattern map when the actual positional change of the accelerator pedal due to tip-in is greater than or equal to a predetermined first positional change and the tip-in speed is faster than or equal to a predetermined speed.