JPH0330653U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a system diagram showing an embodiment of the invention, Fig. 3 is a partial sectional view showing the lock-up mechanism, and Fig. 4 shows emergency control in the same embodiment. The flowchart, FIG. 5, is a block diagram of the automatic transmission. 8...Engine, 9...Torque converter, 1
0...Transmission, 11...Automatic transmission, 13...Control device, 22...Auxiliary pump, 31
...Ignition switch, 32...Shift position sensor, 33, 34...Emergency switch.

Claims (1)

[Claim for Utility Model Registration] Engine starting means that starts the engine, and engine output transmitted to the propulsion shaft via an automatic transmission consisting of a torque converter and a plurality of pressure-responsive transmission elements that operate based on operating pressure and perform gear shifting operations. An automatic transmission for a vehicle, comprising a transmission means for transmitting data, and a lockup means provided in a torque converter section for mechanically connecting a drive shaft connected to an engine and a driven shaft under predetermined operating conditions, an emergency switch, an emergency hydraulic pressure supply source, a target shift gear detecting means for detecting a target shift gear of the automatic transmission, and a target shift gear detecting means that detects that the target shift gear is in a reverse position and the emergency switch continues to be operated. In some cases, the emergency oil pressure supply source supplies hydraulic pressure for actuating the lock-up means and a minimum number of pressure-responsive shifting elements to perform a gear shifting operation to the reverse position, and an emergency oil pressure source for enabling the engine starting means. A speed change control device for an automatic transmission for a vehicle, comprising a control means.