Method for controlling an automatic transmission including predetermined time delay in shifting

摘要

The automatic transmission has clutches and brakes to change the gear ratio. The clutches and brakes are independently actuated by hydraulic servos. A hydraulic circuit supplies oil to and from the servos to either actuate or release them. Within the hydraulic circuit are solenoids which respond to an electronic control. The electronic control regulates the pressure in the hydraulic servos by supplying signals to the solenoids. By providing a predetermined time delay in the sending of a signal to the on-coming servo during a gear shift, a smoother shift can be achieved. The shift is further improved by varying the time delay by a predetermined value based on the previous condition of the off-going servo.