Solenoids image

Transmission Valves / Solenoids

Variable Force Solenoid (VFS)

Automatic transmissions use VFS to control the actuation of clutches.

  • High (or low) flow pressure control
  • Proportional / inverse proportional control
  • Insensitive to supply pressure variations


Variable Bleed Solenoid (VBS)

The pressure supplied to a clutch pack in automatic transmissions is controlled by VBS.

  • Low flow pressure control
  • Proportional / inverse proportional control
  • Sensitive to supply pressure variations

Pulse Width Modulated Solenoid (PWM)

PWM solenoids are used for torque convertor control.

  • Used as a pilot valve to a secondary spool

On/Off Directional Control Valve

This transmission solenoid control valve operates with a straight on/off DC current signal.

  • Used with multiplex valve for directional flow control - 3 ports, 2 position