Electromechanical Parking Brake Security via Intermediary Control
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Solution Overview
Problem
Existing electromechanical parking brake systems lack enhanced safety features to prevent unauthorized activation or deactivation, particularly in preventing the release of the brake when the vehicle is not in a secure state.
Innovation Solution
Incorporating a second control component with a stored reference code that blocks or enables the actuation unit independently, integrating it with an immobilizer system that requires a matching code for activation, ensuring the brake can only be operated in the vehicle it is assigned to, and using communication systems like CAN or LIN buses for interaction with other vehicle systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a parking brake system allows activation by driver request alone, then ease of operation is improved, but security against unauthorized use deteriorates
Solution Approach 1:
An intermediary control component is introduced between the driver's request and the actuating unit. This intermediary verifies authorization codes before permitting brake release, thereby maintaining operational ease for authorized users while blocking unauthorized activation attempts.
Solution Approach 2:
The actuating unit incorporates self-verification capabilities through integrated control components that automatically check authorization codes. The system performs self-service security verification without requiring additional manual authentication steps from the user.
2Device complexity
If control components are integrated into actuators to reduce installation space and wiring, then device complexity is reduced, but security functionality deteriorates
Solution Approach 1:
Multiple control functions including authorization verification, brake actuation control, and status monitoring are merged into integrated control components within the actuator. This consolidation reduces overall system complexity while maintaining comprehensive security functionality through the embedded reference code verification.
Data Source
AI summary
Disclosed is an electronic system for operating an electromechanical parking brake system of a vehicle. Said electronic system comprises at least one input unit (10) for detecting a driver's request that is evaluated by a control/regulation unit which triggers at least one actuation unit (31, 32) for applying or releasing at least one brake. The control/regulation unit encompasses at least two control components (21, 22, 23), of which at least one first one (21) can be assigned to the at least one input unit (10) and at least one second one (22, 23) can be assigned to the at least one actuation unit (31, 32). In order to further develop the scope of functions and safety of said electronic system, at least one second control component (22, 23) is designed to block the triggering action of the at least one actuation unit (31, 32) regardless of the driver's request.