Brake Pedal Fallback Hydraulics for Stable Electronic Braking

The patent applies beforehand cushioning by providing a backup hydraulic circuit that is pre-configured to activate when the electronic brake system fails. This backup circuit includes a master cylinder directly connected to wheel cylinders, creating a mechanical safety net that cushions the impact of electronic system failure and maintains braking stability without requiring complex electronic controls during fallback mode.

The patent utilizes parameter changes by switching between two distinct operational modes: normal electronic-controlled mode and mechanical fallback mode. In fallback mode, the system changes the fundamental operating parameter from electronic signal-based hydraulic control to direct mechanical linkage, ensuring that braking stability is maintained through simplified direct connection between driver input and wheel cylinders.

The patent applies segmentation by dividing the brake system into two independent segments: a normal electronic brake system with multiple components for various braking functions, and a simplified backup hydraulic circuit with minimal components. This segmentation allows the complex electronic system to provide versatile braking functions while the simple mechanical backup ensures basic braking capability, reducing overall system complexity by separating critical safety functions from enhanced features.

The patent extracts the essential braking function from the complex electronic system and places it in a separate, simplified backup hydraulic circuit. By taking out only the critical safety function (direct brake pedal to wheel cylinder connection) and isolating it from the complex electronic components, the system maintains versatility in normal operation while reducing the complexity burden for safety-critical operations.

The patent introduces an intermediary backup hydraulic circuit that mediates between the driver's pedal effort and the wheel cylinders when the electronic hydraulic pressure supply device fails. This intermediary mechanical linkage acts as a bridge, ensuring that hydraulic pressure stability is maintained through direct mechanical transmission rather than relying solely on the electronic control system that may be subject to technical malfunctions.

The backup hydraulic circuit operates on self-service principle by using the driver's own pedal effort directly to generate hydraulic pressure without requiring electronic intermediaries. When the electronic system malfunctions, the driver's mechanical input self-generates the necessary hydraulic pressure through the direct mechanical linkage, eliminating dependency on the faulty electronic control system.