Metro L3-61 1.0L (1990)
Brake Fluid Pressure Sensor/Switch: Description and Operation
Combination Valve
Fig. 8 Combination Valve
The combination valve, Fig. 8 is a metering valve, failure warning switch, and a proportioner in one assembly and is used on disc brake applications.
The metering valve delays front disc braking until the rear drum brake shoes contact the drum. The failure warning switch is actuated in event of front or
rear brake system failure, in turn activating a dash warning lamp. The proportioner balances front to rear braking action during rapid deceleration.
Fig. 9 Metering Valve. Initial Braking
Fig. 10 Metering Valve. Continued Braking
Metering Valve
When the brakes are not applied, the metering valve permits the brake fluid to flow through the valve, thus allowing the fluid to expand and contract
with temperature changes.
