Abstract
KEY WORDS:
Variable pressure solenoid valve, Automatic transmission, Pressure control characteristics, Spool displacement
ABSTRACT
A solenoid valve is a mechanical part used to generate spatial movement by an electrical signal. A number of solenoid valves have already been used in the electronic control systems of automobile parts. A solenoid valve used in an automobile is divided into the amplitude-modularity solenoid valve and the variable-pressure solenoid valve according to the operational method. A variable-pressure solenoid valve has a short opening delay time and has advantages of a simple structure, compact size, and little fluctuation pressure compared with the amplitude-modularity solenoid valves. In the present paper, the pressure control characteristics have been performed numerically in the variable-pressure solenoid valve. Dynamics analyses of the pressure control characteristics have been evalvated by the Finite Different Method, which show the pressure distribution in the variable-pressure solenoid valve. The results of numerical analyses show the dependence of pressure distribution on the displacement of the spool in the variable-pressure solenoid valve, and then, are compared with the experimental results.