Electronic Brake Caliper Zero-Point Calibration for Pad Wear

The patent introduces a load switch unit as an intermediary component that directly detects the actual generation and release of braking force on the brake pads. This load switch unit provides accurate timing information about when braking force is actually generated and released, serving as a mediator between the mechanical braking process and the control system. The load switch unit includes a movable block that is pushed by the brake pad during braking, generating an electrical signal that marks the precise timing of braking force generation, thereby resolving the contradiction between motor current-based control and actual braking force timing detection.

The patent implements a dynamic calibration system that automatically adjusts the initial position based on actual braking force generation timing detected by the load switch unit. Instead of using a fixed initial position that becomes obsolete due to brake pad wear, the system continuously adapts the initial position calibration by referencing the actual braking force generation timing. This dynamic adjustment eliminates the ineffective stroke that occurs with fixed calibration, as the system always starts from the correct position regardless of brake pad abrasion, thereby resolving the contradiction between maintaining braking operation and avoiding ineffective stroke.

The patent implements a self-calibrating system where the load switch unit automatically detects the actual braking force generation timing and provides feedback to the control system. The control system uses this feedback to automatically adjust and recalibrate the initial position without requiring manual intervention or complex external calibration equipment. The system serves itself by using the load switch unit's detection capability to continuously maintain accurate positioning despite brake pad wear, resolving the contradiction between adaptability to abrasion and system complexity.