Electro-Hydraulic Brake Circuit Segmentation for Backup Pressure

The hydraulic circuit is divided into a main brake unit and an auxiliary brake unit with physically separated hydraulic circuits. The main brake unit handles normal braking operations, while the auxiliary brake unit provides backup braking capability when the main brake unit fails. This segmentation ensures that a failure in one unit does not compromise the entire braking system, thereby improving reliability while maintaining manageable complexity through functional separation.

The auxiliary brake unit is designed with a separate hydraulic circuit that includes dedicated flow path units (first, second, and third auxiliary flow path units) and corresponding valves. This physical separation and functional segmentation allow for optimized flow control in each unit, improving bridging quality by ensuring that auxiliary braking operations have dedicated, uncontaminated fluid pathways independent of the main brake unit's hydraulic system.

The patent extracts and removes valve components from the fluid supply path between the storage unit and the electric pump in the auxiliary brake unit. By taking out these valves from the critical supply path, the design eliminates valve resistance that would otherwise degrade bridging quality and fluid supply efficiency. Flow control functions are maintained through alternative means in the auxiliary flow path units, allowing the supply path to remain open and resistance-free for optimal performance.