Abstract
Using a hydraulic flow control valve actuated by a linear solenoid instead of the control valve actuated by a hydraulic control valve is valid for miniaturization and light weighting of automatic transmissions. However, it requires advanced control so as to be robust against a flow force in a cylinder and a change of a supply pressure. To design the controller and evaluate the control performance, a precise model of the hydraulic flow control valve is required. This paper describes a precise modeling of a hydraulic flow control valve actuated by a linear solenoid. The accuracy of the obtained model is evaluated by comparing the outputs of the model with that obtained by exqeriments.
