Hybrid Automobile Brake Layout for ABS and Power-Failure Response
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Solution Overview
Problem
Conventional brake systems face challenges in implementing ABS/ESC performance and ensuring braking functionality in failure situations, particularly due to the limitations of electro-mechanical brake systems in responding to power failures and controlling anti-lock brake systems effectively.
Innovation Solution
A brake system that combines a hydraulic brake device and an electro-mechanical brake device, with a master cylinder device generating hydraulic pressure and an electronic control unit controlling both the hydraulic circuit and the electro-mechanical actuators to ensure braking performance across various scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electro-mechanical brake system is used, then braking force can be provided through electrical signals, but the response speed is slower than hydraulic brake systems making it difficult to control ABS/ESC
Solution Approach 1:
The patent combines hydraulic brake devices and electro-mechanical brake devices into a single brake system. The hydraulic brake devices provide fast response for ABS/ESC control, while the electro-mechanical brake devices provide automated electrical signal control. This merging allows the system to achieve both fast response speed and high extent of automation simultaneously.
2Extent of automation
If an electro-mechanical brake system is used, then automated braking control is achieved, but it is difficult to respond to power supply failures
Solution Approach 1:
The patent incorporates redundancy by providing both hydraulic and electro-mechanical brake devices. The hydraulic brake devices serve as a backup system that can operate independently when power supply fails, ensuring the brake system remains reliable even in failure situations. This beforehand cushioning approach prepares for potential power failures by having an alternative braking mechanism in place.
3Speed
If only hydraulic brake systems are used, then fast response speed is achieved, but automated ABS/ESC control performance cannot be fully implemented
Solution Approach 1:
The patent merges hydraulic brake devices with electro-mechanical brake devices and an electronic control unit. The electronic control unit receives electrical signals and controls both the hydraulic and electro-mechanical systems, enabling full automated ABS/ESC control performance while maintaining the fast response speed advantage of hydraulic systems.
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
The combined system enables effective ABS/ESC performance and ensures braking functionality even in failure situations by leveraging the fast response of hydraulic systems and the reliability of electro-mechanical actuators.
Implementation Method 1
a master cylinder device connected to the reservoir and generating the hydraulic pressure corresponding to a displacement of the brake pedal
Implementation Method 2
a feeling damper provided to be compressible as the piston advances and retreats
Data Source
AI summary
A brake system for automobile includes: a first brake device provided on two wheels of the automobile, respectively, to perform a braking operation by either transmitted hydraulic pressure or a first electro-mechanical actuator built thereinto; a second brake device provided on other two wheels of the automobile, respectively, to perform the braking operation by a second electro-mechanical actuator built thereinto; a reservoir in which a pressurized medium is stored; a master cylinder device connected to the reservoir and generating the hydraulic pressure corresponding to a displacement of a brake pedal; a hydraulic circuit controlling the hydraulic pressure transmitted from the master cylinder device to the first brake device; and an electronic control unit controlling the first electro-mechanical actuator, the second electro-mechanical actuator and the hydraulic circuit, respectively, so that the first brake device and the second brake device generate braking force in response to the displacement of the brake pedal.