Patent ID: 6597978
Filing Date: 2003-07-22
Classification: B60W,F16H,Y10T

Abstract:
A method for controlling an automatic transmission driven by a prime mover in which a shift from a first to a second transmission ratio occurs as one of a pull upshift, a push downshift, a pull downshift and a push upshift by a first clutch opening and a second clutch closing and an electronic transmission control device controls, via electromagnetic values, the pressure curve of the first and of the second clutch during the shift operation and the shift consists of a rapid-filling (SE), a filling-equalization (FA), a load-transfer (LÃœ), a gradient setting (GE), a sliding (GL), a gradient-reduction (GA) and a closing (S) phase and that within the load-transfer (LÃœ), a gradient-setting (GE), the sliding (GL), the gradient-reduction (GA) and the closing (S) phases an engine intervention occurs wherein at least one of an engine torque (M_MOT) and a characteristic value that determines the engine torque is transmitted form a transmission control device to an engine control device of the prime mover, and wherein the directive of the engine intervention to the engine and the pressure directives to the transmission are jointly synchronized when they have different time characteristics.