Here's how a fast fill valve works:
1. Reservoir Connection: The fast fill valve is connected to the brake fluid reservoir of the master cylinder.
2. Internal Valve: Inside the fast fill valve, there is a check valve or a ball valve that controls the flow of brake fluid.
3. Brake Pedal Release: When the brake pedal is released, the pressure in the master cylinder decreases.
4. Valve Opening: The decrease in pressure causes the internal valve in the fast fill valve to open.
5. Fluid Flow: Brake fluid from the reservoir is then allowed to flow rapidly into the master cylinder, refilling it quickly.
6. Valve Closure: Once the master cylinder is refilled to an optimal level, the pressure inside increases, causing the internal valve in the fast fill valve to close, preventing any further fluid flow.
The purpose of a fast fill valve is to minimize the amount of time it takes to replenish brake fluid in the master cylinder. This is particularly important in high-performance vehicles where quick brake pedal response and high braking efficiency are crucial. By enabling rapid refilling, the fast fill valve ensures a continuous supply of brake fluid to the master cylinder, preventing any potential brake fade or loss of braking power due to low fluid levels.
