Brake-By-Wire Emergency Voltage Control for Power Supply Faults
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Solution Overview
Problem
Existing electric braking systems in vehicles lack a redundant power supply mechanism to ensure safe and efficient braking in the event of a power supply failure, particularly in brake-by-wire systems where mechanical fallback is absent.
Innovation Solution
A method involving a monitoring unit that detects power supply faults by comparing voltage values with thresholds, activating an emergency voltage source to operate a control device in the braking system, generating brake pressure using an emergency power source independent of the primary power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a brake-by-wire system is used to achieve mechanical decoupling between actuation and brake, then automation and space efficiency are improved, but reliability deteriorates due to absence of mechanical fallback
Solution Approach 1:
The patent implements a monitoring unit that continuously checks voltage supply to the braking system and detects faults before they lead to complete system failure. By detecting voltage deviations from threshold values and triggering emergency braking procedures in advance, the system cushions against the reliability risks inherent in brake-by-wire architecture without mechanical fallback.
2Reliability
If an emergency voltage source is added to provide redundant power supply, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the emergency voltage source functionality with the existing braking control system by integrating a monitoring unit that continuously checks voltage supply and automatically triggers emergency braking procedures. This combination approach provides redundant power supply capability without adding completely separate emergency braking hardware, thereby improving reliability while limiting the increase in device complexity.
3Reliability
If continuous voltage monitoring is implemented to detect power supply faults, then reliability is improved, but energy consumption increases
Solution Approach 1:
The monitoring unit implements a feedback mechanism that continuously checks voltage supply to the braking system and compares measured values against threshold values. This feedback loop enables reliable fault detection by automatically identifying when voltage deviates from acceptable ranges, triggering emergency braking procedures only when necessary, thereby balancing reliability improvement with controlled energy consumption.
Data Source
AI summary
The invention relates to a method for automatically carrying out a braking process for a vehicle (1) in the event of a fault in a voltage supply (8) of the vehicle (1), wherein - a voltage value (10) of the voltage supply (8) is checked by means of a monitoring unit (11), - at least one fault event in the voltage supply (8) is established by means of the monitoring unit (11) by way of the voltage value (10) of the voltage supply (8) being compared with a specified threshold value, - when the fault event is established, an emergency voltage (14) is provided by means of an emergency voltage source (13) that is different from the voltage supply (8) of the vehicle (1) to a brake system (4) for carrying out the braking process, - a control device (15) of at least one brake installation (6) of the brake system (4) is operated depending on the emergency voltage (14), and - a brake pressure is generated in the at least one brake installation (6) by the operated control device (15), as a result of which the braking process is automatically carried out. The invention also relates to an electronic vehicle safety system (9) and to a vehicle (1).