Patent ID: 6644350
Filing Date: 2003-11-11
Classification: F16D,F16K,Y10T

Abstract:
A fluid control device for an automotive transmission, comprising:a pump for generating a pressurized fluid; a spool valve operably coupled to the pump for controllably conveying the pressurized fluid from the pump to another hydraulic device, the spool valve including a pilot port for receiving a control pressure for controlling the operation of the spool valve; and a proportional variable pressure solenoid valve for receiving the pressurized fluid and generating the control pressure for controlling the operation of the spool valve in proportion to the current level of an electrical input signal, including: a movable valve for controlling the pressure of the control pressure, the movable valve including: an inlet valve for controlling the flow of the pressurized fluid into the solenoid valve; and an exhaust valve for controlling the exhaust of the pressurized fluid from the solenoid valve; a solenoid for controlling the movement of the movable valve, the solenoid including: an armature spring biased at a first end and engaged with the exhaust valve at a second end for transmitting force in one direction for displacing the movable valve; the second end of the armature engaged with a diaphragm member in abutment with a suspension member; a flux member receiving the second end of the armature; a wave washer mounted adjacent the flux member; and an electromagnetic coil for generating a variable electromagnetic field in response to the electrical input signal for moving the spring biased armature; and a common housing.