Vehicle Bus Emergency Braking Backup for Secure Standstill
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Solution Overview
Problem
Existing emergency braking systems in vehicles, particularly commercial vehicles, lack redundancy and reliability, especially after accidents, leading to potential failure in engaging the parking brake when stationary, which can endanger rescue personnel and increase the risk of secondary collisions.
Innovation Solution
A method that utilizes the vehicle bus system to monitor signals, detect emergency braking situations, and engage the braking device, such as a parking brake, even if the primary driver assistance system is damaged, by using redundant systems or modules connected to the vehicle bus system, ensuring the vehicle remains stationary and secure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the parking brake is only engaged when a vehicle ahead is detected by a detection device, then the braking system can respond to emergency situations, but the system fails when the detection device is damaged in a collision
Solution Approach 1:
The patent uses the vehicle bus system as an intermediary to transmit emergency braking signals from the driver assistance system to the braking system. This mediator approach allows the braking system to receive emergency braking commands through the bus system rather than requiring direct connection to detection devices, enabling the system to function even when detection devices are damaged.
Solution Approach 2:
The patent segments the emergency braking functionality into separate components: the driver assistance system generates emergency braking signals, the vehicle bus system transmits these signals, and the braking system executes the braking action. This segmentation allows one component (braking system) to function independently using signals from another component (driver assistance system) via the bus system.
2Extent of automation
If the vehicle braking system relies on commands from the electrical control system, then automated emergency braking can be achieved, but a failure of the control system results in failure of the entire functionality
Solution Approach 1:
The vehicle bus system serves as an intermediary communication channel between the electrical control system and the braking system. By using this intermediate bus system, the braking system can receive commands even if the primary control system fails, as the bus system provides an alternative communication path.
Solution Approach 2:
The patent implements redundancy by having the braking system capable of receiving emergency braking signals through the vehicle bus system as a backup path. This beforehand cushioning ensures that if the primary control system fails, the braking system can still function through the alternative bus system communication path.
3Stability of the object's composition
If the vehicle is secured by engaging the parking brake after emergency braking, then the vehicle remains stationary, but this requires the detection device to be functional
Solution Approach 1:
The patent separates the vehicle securing function from the detection device by using the vehicle bus system as an independent communication channel. The braking system can engage the parking brake based on emergency braking signals received through the bus system, independent of the detection device's operational status.
Solution Approach 2:
The vehicle bus system acts as an intermediary that transmits emergency braking signals to the braking system, enabling the vehicle securing function to operate through this intermediate communication channel rather than requiring direct functionality from the detection device.
Data Source
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AI summary
The invention relates to a method (100) for securing a vehicle (200), preferably a commercial vehicle (202), in an emergency braking situation (NB), the vehicle (200) having a vehicle bus system (204) and a braking system (220), the method having the following steps: monitoring signals (S) on the vehicle bus system (204); detecting an emergency braking signal (SNB) which is provided from a driver assistance system (206) on the vehicle bus system (204); ascertaining (E) whether the vehicle (200) is at a standstill (H); bringing a braking device (222) of the braking system (220) into a braking position (BS) if a standstill (H) of the vehicle (200) is ascertained. The invention also relates to a control unit (210) for a vehicle (200), a computer program (C), a braking system (220) for a vehicle (200), and a vehicle (200).