Patent ID: 9169924
Filing Date: 2015-10-27
Classification: F16H,Y10T

Abstract:
1. A control device for an automatic transmission comprising: a manual valve switching a hydraulic circuit to control a flow of an operation fluid acting on a friction engagement element disposed in a gearbox; a fluid-pressure control valve controlling a fluid pressure of the operation fluid acting on the friction engagement element; a controller switching a shift range to a target range according to an operation of a range selector by controlling the manual valve and the fluid-pressure control valve; a decreased fluid-pressure determiner determining whether the fluid pressure of the operation fluid acting on a just-engaged friction engagement element, which is switched from a released-state to an engaged-state according to a switching of the target range, is fully decreased; and a hydraulic circuit time delayer delaying a switching timing of the hydraulic circuit by the manual valve to a delayed timing when it is determined that the fluid pressure of the operation fluid that acts on the just-engaged friction engagement element is not in a fully-decreased state.