UEBERBRUECKUNGSSTEUERUNG FUER AUTOMATISCHE KRAFTUEBERTRAGUNGEN FUER KRAFTFAHRZEUGE

摘要

A control system for an automobile automatic power transmission provided with a hydraulic torque converter having a lock-up mechanism for directly connecting the input and output shafts of the torque converter. The control system uses a lock-up release data line and a lock-up engage data line which is positioned at the higher-engine speed side with respect to the lock-up release data line for controlling engagement of the lock-up mechanism. The system further provides a modified lock-up engage data line, which is between the lock-up engage and release lines, for use when the engine throttle valve is opened again after it has been completely closed, so that the lock-up mechanism is engaged as soon as the throttle valve is opened beyond the modified lock-up engage data line.