Engine Mount Control System
The engine mount control system is designed to help control excessive engine vibration at idle. The system is comprised of the control unit, the solenoid valve and the rear engine mount with built-in diaphragm actuator. See Fig 1 . The control unit receives engine rpm signals and sends a signal to the solenoid valve to open only at idle. When the solenoid valve opens, intake manifold vacuum is applied to the diaphragm actuator, and the rotor valve located in the rear mount rotates 80 degrees. The mount has Chamber A on its upper part and Chamber B on the lower part. The rotor valve located between these two chambers controls the quantity of liquid that flows between them. At idle, the rotor opens, and liquid flows through passages 1 and 2. Dampening decreases, and vibration at idle is reduced. See Fig 2 . Above idle, passage 1 is closed, and liquid only flows through passage 2. Dampening increases, and vibration above idle is reduced. See Fig 3 .