Patent ES-8602224-A1 (ES)
Title: Control system for vehicle transmission.
IPC: F16H61/00
Filed: 1984-12-28
Abstract: The control system has a control circuit coupled to the gear change device (18,22) and to the control-mode selector (56). This generates automatic gear change control signals as a function of measured vehicle and gear parameters when the control system is in its automatic control mode. - The control circuit has a mode switch to change the system automatically from the automatic mode into the manual mode depending on selected conditions and without operating the mode selector. The mode selector has a defective-change detector which detects when the gear change device has changed over the gear successively in response to a gear-change signal. A fault signal is produced after given number of attempts. (1/10) EPAB- EP-110428 B Control system (10) for change-speed gears (12) of motor vehicles, with a manually operable device (28) for generating manual - gear-change control signals a device (30,34) operable through transducers (32) for sensing vehicle and gear parameters, for generating automatic gear-change control signals gear-change operating devices (18,22) for changing the gear in dependence on manual or automatic gear-change control signals an operating mode selector device (56) operable by the driver for selecting the manual or the automatic control mode of the gear changing, and an operating mode circuit arrangement which, with automatic operating mode selected, automatically switches into neutral in the manual operating mode without actuation of the operating mode selector device (56) and without a change of the gear, when predetermined operating conditions occur, characterised in that the operating mode circuit arrangement comprises a sensing device for false changes, which monitors the changes of the gear-change operating devices (18,22) of the gear (12) in dependence on the gear-change control signals and generates an error signal (step 372) in dependence on a predetermined number of unsuccessful change attempts (error attempts) of the gear-change operating device of the gear in dependence on the gear-change control signals, which triggers the automatic switching into the manual operating mode, as well as a device which (steps 320 to 320) prevents the automatic generation of further gear-change control signals after occurrence of the predetermined number of error attempts, in such a manner that the gear (12) can thereafter only be changed manually. - (26pp) USAB- US4561055 A The system comprises an engine-driven transmission for transmitting torque at selected gear ratios. A manual input manually generates shift control signals. A shift device shifts the transmission among its gear ratios in response to manually and automatically generated shift control signals. An operator-actuatable mode selecting device selectively places the control system in an automatic control mode and in a manual control mode. - A control unit is coupled to the shift device and to the mode selecting device for automatically generating shift control signals as a function of sensed vehicle and transmission operating parameters when the control system is in its automatic control mode. The control unit includes mode switching devices for automatically switching the control system from its automatic to its manual control mode in response to selected conditions without actuation of the mode selecting device.