Auxiliary Hydraulic Brake Layout for Main Brake Failure Backup
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Solution Overview
Problem
Conventional hydraulic brake systems in autonomous vehicles fail to provide auxiliary braking when an error occurs in main braking, leading to potential accidents.
Innovation Solution
A brake apparatus with an auxiliary braking system that includes an auxiliary block part, an auxiliary electric part, and a wheel flow channel part, which supplies oil to wheel cylinder parts when an error occurs in the main braking system, using an auxiliary motor and pump to amplify pressure and connect to stored oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the main braking system is used in autonomous vehicles, then braking efficiency is improved, but system reliability deteriorates because auxiliary braking is not performed when an error occurs in main braking
Solution Approach 1:
The auxiliary braking system is pre-configured with hydraulic lines, valves, and pump connections before any failure occurs. When the main braking system fails, the auxiliary system can immediately activate without requiring complex real-time decision-making or reconfiguration, thus providing preliminary preparedness that enhances reliability while maintaining the primary braking system's efficiency
Solution Approach 2:
The auxiliary braking system acts as a pre-prepared safety cushion that activates when the main braking system fails. By having this backup system in place beforehand with pre-positioned hydraulic components and control valves, the system provides a safety buffer that prevents catastrophic failure, thereby improving reliability without compromising the main system's braking efficiency
2Reliability
If the auxiliary braking system is added to provide backup braking, then system reliability is improved, but device complexity increases due to additional components and hydraulic lines
Solution Approach 1:
The auxiliary braking system shares common hydraulic lines and control mechanisms with the main braking system where possible. By merging certain hydraulic pathways and using shared components such as the master cylinder and brake fluid reservoir, the design reduces the number of separate systems needed, thereby improving reliability through redundancy while minimizing the increase in overall device complexity
Solution Approach 2:
The auxiliary braking system components are designed to serve multiple functions: the auxiliary hydraulic lines can serve both normal auxiliary braking operations and emergency backup functions. The control valve can redirect hydraulic flow between different configurations depending on system needs, allowing a single component to perform multiple roles, thus improving reliability without proportionally increasing complexity
3Reliability
If the auxiliary braking system uses separate hydraulic lines and valves, then braking reliability is improved through redundancy, but manufacturing cost and device complexity increase
Solution Approach 1:
Instead of creating entirely separate redundant hydraulic systems throughout the vehicle, the auxiliary braking system implements local quality enhancements by adding redundancy only in critical areas such as the hydraulic line branches to individual wheels and the control valve mechanisms. This localized approach to redundancy maintains braking reliability while simplifying manufacturing compared to full-system duplication
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures safe operation by providing auxiliary braking, preventing accidents by supplying oil to wheel cylinder parts even when the main braking system fails, utilizing a symmetrical design for efficient hydraulic line control.
Implementation Method 1
a master cylinder part in which pressure of oil is amplified by the pedal part
Implementation Method 2
an auxiliary electric part mounted on the auxiliary block part and driven when power is applied thereto
Implementation Method 3
a connection valve part disposed in the connection line part and configured to adjust the amount of oil that passes through the connection line part by opening and closing the connection line part
Data Source
AI summary
A brake apparatus includes a pedal part capable of being pressurized, a master cylinder part in which pressure of oil is amplified by the pedal part, a storage part that is connected to the master cylinder part and stores oil temporarily, a main braking part connected to the master cylinder part and supplied with oil from the master cylinder part, connected to some of a plurality of wheel cylinder parts, and configured to supply oil for braking to the wheel cylinder parts connected to the main braking part, and an auxiliary braking part configured to connect the main braking part to remaining wheel cylinder parts of the plurality of wheel cylinder parts, connected to the storage part, and configured to amplify pressure of oil by self-driving when an error occurs in the main braking part.