Brake System Monitoring for Primary Pressure Failure Detection
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Solution Overview
Problem
Existing brake installations for motor vehicles lack a reliable method to quickly identify failures in the primary brake system, which can lead to inadequate braking performance, especially in situations where the primary system's pressure provision function fails.
Innovation Solution
The secondary brake system monitors the primary brake system using signals from its own pressure detection devices and predefined brake pressure demands to determine if the primary system can meet the required brake pressure, allowing it to take over braking functions if necessary, ensuring reliable operation even in primary system failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary brake system is used for normal braking operations, then the braking performance is adequate, but the system cannot quickly identify failures leading to safety risks
Solution Approach 1:
The patent introduces a monitoring device as an intermediary component that independently monitors the primary brake system's pressure provision function. This monitoring device includes pressure sensors and evaluation units that detect pressure deviations and communicate failure states to the secondary brake system, enabling reliable failure identification without significantly increasing overall system complexity.
Solution Approach 2:
The patent implements a feedback mechanism where the monitoring device continuously monitors the primary brake system's output pressure and provides real-time feedback about the system's functional state. When pressure deviations are detected, the monitoring device sends signals to the secondary brake system, enabling quick response to failures and maintaining safety.
2Reliability
If the secondary brake system is added as a backup, then the safety is improved, but the device complexity and cost increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring the secondary brake system to automatically activate when the monitoring device detects a failure in the primary system. The monitoring device continuously evaluates the primary system's state and is ready to trigger the secondary system immediately upon detecting pressure deviations, ensuring no loss of braking function.
Solution Approach 2:
The patent applies beforehand cushioning by providing the secondary brake system as a pre-prepared backup that compensates for potential primary system failures. This redundancy ensures that if the primary system fails, the secondary system is already in place and can immediately take over, cushioning against the harmful effect of complete brake failure.
3Ease of operation
If the primary brake system fails, then the braking function is lost, but with proper monitoring the secondary system can take over
Solution Approach 1:
The monitoring device provides continuous real-time feedback about the primary brake system's pressure provision function through pressure sensors and evaluation units. This immediate feedback enables the system to detect failures without delay and automatically activate the secondary brake system, minimizing loss of time and ensuring seamless failover.
Solution Approach 2:
The monitoring device performs self-service by autonomously detecting pressure deviations, evaluating the primary system's functional state, and automatically triggering the secondary brake system without requiring external intervention. This self-service capability ensures rapid failure detection and automatic failover, maintaining ease of operation.
Data Source
AI summary
A method for operating a brake installation of a vehicle. A first electrically controllable pressure provision device provides brake pressure for actuating hydraulically actuatable brakes. A first electronic open-loop and closed-loop control unit, and a first pressure detection device, measures brake pressure provided by a primary brake system. A secondary brake system between the primary system and a part of the wheel brakes has a second electrically controllable pressure provision device provides brake pressure for actuating at least the part of the brakes. A second electronic open-loop and closed-loop control unit, and at least one second pressure detection device, the signals of which are processed in the second electronic open-loop and closed-loop control unit. The secondary system monitors the primary system based on signals from the second pressure detection device and on a predefined brake pressure demand to build up a brake pressure corresponding to the predefined brake pressure demand.