Parking Brake Redundant Control for Processor Failure Backup
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Solution Overview
Problem
Existing brake devices lack the reliability, stability, and robustness required for improved parking brake performance, particularly in scenarios where primary systems fail.
Innovation Solution
A brake device incorporating a main processor and driver, along with a redundant processor and driver, which control and drive a parking brake. The system includes a hydraulic pressure supply unit connected to wheel cylinders and a parking brake on at least one wheel cylinder, with processors communicating through a signal line to ensure continuous operation even if the primary processor fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single processor and driver are used to control the parking brake, then the device complexity is low, but the reliability and stability are insufficient
Solution Approach 1:
The patent implements a redundant processor that copies the functionality of the main processor. When the main processor fails, the redundant processor can take over control of the parking brake system, ensuring continued operation. This copying approach directly addresses the reliability issue by providing a backup without requiring complete system redesign.
Solution Approach 2:
The system prepares backup processing capability in advance through the redundant processor and driver configuration. This beforehand cushioning ensures that if the main processor fails, the parking brake function can continue without interruption, cushioning against the potential failure impact before it occurs.
2Stability of the object's composition
If a redundant processor and driver are added to improve reliability, then the parking brake stability improves, but the device complexity increases
Solution Approach 1:
The redundant processor and driver are configured as copies of the main processing system, allowing them to assume identical control functions when needed. This copying strategy provides stability through redundancy while maintaining a relatively straightforward system architecture that mirrors the primary control path.
Solution Approach 2:
The redundancy is applied specifically to the critical parking brake control function rather than the entire brake system. This local quality approach concentrates the stability-enhancing redundancy where it is most needed (in the processor controlling the parking brake) without unnecessarily complicating other system areas.
3Reliability
If the system continuously monitors processor signals for failure detection, then the reliability improves, but the use of energy increases
Solution Approach 1:
The system implements a feedback mechanism where the main processor sends periodic signals to the redundant processor to indicate its operational status. This feedback loop allows the system to detect processor failures reliably while using energy only for the periodic signal transmission rather than continuous monitoring, optimizing the balance between reliability and energy consumption.
Data Source
AI summary
The brake device may comprise: a hydraulic pressure supply unit fluidically connected to wheel cylinders of a vehicle; a parking brake arranged at at least one of the wheel cylinders; a first processor electrically connected to the hydraulic pressure supply unit and the parking brake; and a second processor electrically connected to the parking brake, and electrically connected to the first processor through a signal line. The first processor can control the hydraulic pressure supply unit on the basis of output signals of a pedal sensor of the vehicle, control the parking brake on the basis of output signals of a parking switch of the vehicle, and provide periodic signals to the second processor through the signal line. The second processor can control the parking brake on the basis of the output signals of the pedal sensor if the periodic signals of the first processor are not received.