EPB Control Using Redundant Motion-State Detection
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Solution Overview
Problem
The existing Electronic Park Brake (EPB) systems in vehicles rely on speed sensors for determining the vehicle's motion state, which are prone to failure, leading to unreliable control of the braking system.
Innovation Solution
A method for controlling a vehicle braking system that utilizes a plurality of detection devices, including speed sensors, position sensors, and force sensors, to detect information about the vehicle's motion state, and combines this information with data from an Advanced Driver Assistance System (ADAS) and a vehicle data connection sub-system to ensure reliable and timely control of the EPB system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If speed sensors are used to determine vehicle motion state for EPB control, then the control function is achieved, but the reliability deteriorates due to sensor failure
Solution Approach 1:
The patent combines multiple detection devices (speed sensors, position sensors, force sensors) into an integrated detection system that works together to determine vehicle motion state. This merging approach ensures that if one sensor fails, others can compensate, thereby improving reliability while managing system complexity through unified control logic.
Solution Approach 2:
The patent implements redundant detection capabilities by incorporating multiple types of sensors that can compensate for potential failures. The system is designed with beforehand cushioning against sensor failures by having alternative detection methods ready, ensuring continuous reliable operation of the EPB control function.
2Reliability
If multiple detection devices are used to improve reliability, then the reliability improves, but the device complexity increases
Solution Approach 1:
The detection devices in the patent are designed with multi-functionality, where speed sensors, position sensors, and force sensors can serve multiple purposes in determining vehicle motion state. This universality allows the system to achieve high reliability through redundant detection capabilities while managing complexity by having sensors perform multiple functions rather than requiring dedicated sensors for each function.
3Reliability
If redundant information sources are provided, then the reliability improves, but the processing complexity increases
Solution Approach 1:
The control unit processes information from multiple detection devices using feedback mechanisms to continuously monitor and adjust the determination of vehicle motion state. The system uses feedback from various sensors to verify consistency and reliability of the detected state, improving control reliability while managing processing complexity through structured feedback loops.
Data Source
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AI summary
A method (500) for controlling a braking system of a vehicle, comprising the steps of: detecting (501 ), by a first plurality of detection devices distributed on the braking system of the vehicle, first information representative of a condition of motion of the vehicle; detecting (502), by a second plurality of detection devices belonging to a first driver assistance sub-system associated with the vehicle, second information representative of a condition of motion of the vehicle; determining (503), by a first data processing block, a first control signal of a braking module of the vehicle based on said first information and said second information; - controlling (504), by the first data processing block, the braking module of the vehicle based on the determined first control signal.