What is the purpose of a debooster in brake systems?

The purpose of a debooster in brake systems is to reduce hydraulic system high pressure. In aviation brake systems, particularly those that use hydraulic mechanisms, the hydraulic pressure generated can often be excessive, which could lead to difficulties in achieving desired braking performance. The debooster functions to regulate this pressure, ensuring that it is within an operational range that provides effective brake action without overwhelming the brake components or causing excessive wear.

When the pressure is excessively high, it can lead to challenges like overheating or brake lockup. By reducing the high hydraulic pressure, the debooster allows for smoother, more controllable braking, enhancing the safety and effectiveness of the braking system.

The other options involve aspects related to braking but do not capture the primary function of the debooster. For instance, enhancing hydraulic pressure or boosting braking power would be contrary to the purpose of a debooster, which is to mitigate high pressure rather than enhance it. Improving brake cooling is also not directly related to the function of a debooster. This focuses on pressure management within the hydraulic system, aiming to optimize the performance and safety of the braking system in an aircraft.