JPH02101169U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram showing an embodiment of the present invention;
FIG. 2 is a simplified diagram of the main parts of FIG. 1, FIGS. 3 and 4 are control characteristic diagrams of the first and second block-up controllers, and FIG. 5 is an overall configuration diagram showing a conventional device. FIG. 6 is a shift lever behavior diagram illustrating an example of a shift operation, FIG. 7 is a chart diagram illustrating the order of the shift operation, and FIG. 8 is a timing chart corresponding to FIG. 7. 2... Lock-up clutch, 3... Torque converter, 4... Power cut-off clutch, 5... Power cut-off clutch valve, 6... Lock-up clutch valve,
10...Transmission, 16...Shift actuator, 1
8-21... Select actuator, 29... Vehicle speed sensor, 44... Clutch relay, 51... First lock-up controller, 52... Second lock-up controller, 53... First power transistor, 54... Second lock-up controller. Power transistor, 55...engine rotation sensor.

Claims (1)

[Scope of utility model registration request] A torque converter with a lock-up clutch and a power cut-off clutch are interposed between the engine and the multi-stage transmission, and the gear shift actuator of the transmission is operated based on a signal from a lever position detection means of a gear shift operation lever in the driver's seat. In a vehicle automatic transmission equipped with a drive control circuit that drives each actuator of a lock-up clutch and a power cut-off clutch, it is determined that the vehicle speed is below a set value and the engine speed is An automatic transmission device for a vehicle, characterized in that it is provided with a control means for controlling a lock-up clutch to disengage when either of the conditions is below a set value slightly higher than an idling speed.