JPS61161457U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a claim correspondence diagram of this invention, Fig. 2 is a schematic configuration diagram showing an embodiment of this invention, Fig. 3 is a flowchart showing an example of control operation, and Fig. 4
The figure is a schematic configuration diagram of a conventional device, and FIG. 5 is a block diagram thereof. 12... Engine rotation sensor, 13... Governor control device, 15... Load sensor, 21... Clutch position sensor, 22... Clutch disconnection device, 32... Main shaft rotation sensor (vehicle speed sensor), 34... Shift position sensor, 35... Gear shift device , 40A...microcomputer, 60...low speed travel switch.

Claims (1)

[Scope of utility model registration request] In an automatic transmission system that automatically shifts gears based on a preset pattern depending on the vehicle's driving condition, there is a circuit that sets a neutral set condition vehicle speed value corresponding to an engine speed higher than idling speed, and a circuit that sets a neutral set condition vehicle speed value corresponding to an engine speed higher than idling speed. A circuit that sets the neutral set condition engine speed lower than the above neutral set condition vehicle speed value, a slow speed drive switch that instructs slow speed driving, and when the slow speed drive switch is off, when the vehicle speed decreases below the above neutral set condition vehicle speed value, An automatic transmission system for a vehicle, comprising control means for setting the transmission to neutral when the engine speed drops below the neutral set condition speed value when the travel switch is on.