Patent ID: 6625531
Filing Date: 2003-09-23
Classification: B60W,F16H,Y10T

Abstract:
A vehicle control system, comprising:an engine, an infinitely variable transmission connected to the engine, the transmission comprising a continuously variable speed change mechanism, a planetary gear set, and an operation mode change-over mechanism which changes over between a power recirculation mode wherein power is transmitted through the speed change mechanism and planetary gear set, and a CVT direct mode wherein power is transmitted only through the speed change mechanism, a drive shaft to which the torque of the engine is transmitted via the transmission, and a microprocessor programmed to: determine whether the operation mode of the transmission is the power recirculation mode or the CVT direct mode, select an inertia torque computing equation corresponding to the operation mode of the transmission, compute the inertia torque accompanying a speed change of the transmission using the selected inertia torque computing equation, adjust the torque of the engine so that the computed inertia torque is compensated, and interrupt adjustment of the engine torque based on the inertia torque while the transmission is undergoing a change-over of the operation mode.