Schaltung von Übersetzungsstufen in einem Automatikgetriebe

摘要

In shifting speed stages of an automatic transmission by selective engagement and disengagement of friction engaging means, first and second patterns of combination of engagement and disengagement of the friction engaging means are prepared for a certain one speed stage so that a certain one of the friction engaging means bears a first magnitude of torque under the first pattern and a second magnitude of torque greater than the first magnitude of torque under the second pattern, and speed stage shifting to or from the first pattern is carried out through the second pattern.