| 摘要 |
PURPOSE:To prevent the generation of speed change shock by carrying out speed change by turning-OFF a direct connection clutch when a speed change signal is input and turning-ON the direct connection clutch by increasing the number of engine revolution for a prescribed time in case of shift-down. CONSTITUTION:Receiving the car speed over a speed change point, a transmission controller 60 turns-OFF a direct connection clutch through a lock-up selector valve 41, and performs speed change by controlling the first-seventh speed change valves 31-37, and then turns-OFF the direct connection clutch. The number of engine revolution detected by a sensor 47, accelerator opening degree detected by a sensor 52, and the rack lever position of an electronic control governor 42 which is detected by a sensor 46 are input into the second control circuit 4 of an engine controller 50, and when the shift-down speed change is instructed from the transmission controller 60, a speed increasing signal is outputted for a prescribed time, e.g.. for 1sec into a control valve 45, and the fuel injection quantity is increased, and the number of revolution in the case when the direct connection clutch is jointed is allowed to accord. Therefore, the generation of the speed change shock can be prevented. |
