Electric Brake Pressure Estimation With EPB State Switching

The system dynamically switches between two different mapping relationships based on the EPB application state. When EPB is applied, the controller uses a second mapping relationship that accounts for the changed cylinder volume; when EPB is not applied, it uses a first mapping relationship for the normal state. This dynamic adaptation resolves the contradiction by making the pressure estimation system flexible enough to handle both braking force enhancement and measurement accuracy requirements.

The invention changes the mapping parameters used for pressure estimation based on the EPB application state. By storing and switching between different mapping relationships (first mapping for normal state, second mapping for EPB applied state), the system adapts to the parameter changes in cylinder volume caused by EPB activation, thereby maintaining accurate pressure estimation despite the physical changes in the system.

The system transitions from a static single mapping approach to a dynamic multi-mapping approach. The controller automatically selects the appropriate mapping relationship based on the EPB application state detected by the sensor, enabling the system to maintain simplicity in operation while achieving high accuracy through conditional parameter switching.

The system uses feedback from the EPB application state sensor to determine which mapping relationship to use. This feedback mechanism allows the controller to adaptively select the correct mapping (first or second) based on real-time system conditions, resolving the contradiction between simplicity and accuracy by making the system intelligent rather than complex.