Electric Brake Reservoir Segmentation for ABS Reliability
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Solution Overview
Problem
The existing electric brake systems face efficiency deterioration during ABS control and emergency braking operations due to the lack of independent operation of the master cylinder and hydraulic pressure supply device, leading to potential failures in hydraulic pressure delivery.
Innovation Solution
An electric brake system is designed with a reservoir having separate chambers connected to both the master cylinder and hydraulic pressure supply device, allowing independent operation and enhanced hydraulic pressure delivery through a complex network of flow paths and valves controlled by an electronic control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reservoir chamber is connected to both the master cylinder and hydraulic pressure supply device, then the device complexity is reduced, but the reliability deteriorates because one failure affects both systems
Solution Approach 1:
The reservoir is divided into two separate chambers: a first reservoir chamber connected to the master cylinder and a second reservoir chamber connected to the hydraulic pressure supply device. This segmentation allows independent operation of each braking system, so that a failure in one chamber does not affect the other, thereby improving reliability while maintaining reasonable device complexity.
2Ease of operation
If the master cylinder and hydraulic pressure supply device share the same oil supply, then the ease of operation is improved, but the productivity deteriorates during ABS control due to efficiency loss
Solution Approach 1:
By separating the oil supply into two independent chambers, the system can independently supply oil to the master cylinder for normal braking operations and to the hydraulic pressure supply device for ABS control operations. This prevents efficiency deterioration during ABS control while maintaining ease of operation for normal braking.
3Device complexity
If one inner chamber of the reservoir is connected to the hydraulic pressure supply device, then the device complexity is reduced, but the reliability deteriorates during emergency braking when a connection failure occurs
Solution Approach 1:
The reservoir is segmented into two independent chambers with separate connection paths to the master cylinder and hydraulic pressure supply device. This ensures that during emergency braking, a connection failure in one chamber does not compromise the other system, maintaining reliability while keeping the hydraulic circuit design straightforward.
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
This configuration maintains braking efficiency and stability by ensuring independent operation of the master cylinder and hydraulic pressure supply device, preventing failures and improving braking performance during ABS control and emergency operations.
Implementation Method 1
a hydraulic pressure supply device operated by an electrical signal and configured to generate a hydraulic pressure
Implementation Method 2
a brake system, which is configured such that oil is discharged from a master cylinder to be directly delivered a wheel cylinder and generate a braking force
Data Source
AI summary
Disclosed is an electric brake system. The electric brake system includes a reservoir configured to store oil, a master cylinder connected to the reservoir, provided with first and second master chambers and first and second pistons respectively provided at the first and second master chambers, and configured to discharge oil according to pedal effort of a brake pedal; a hydraulic pressure supply device operated to generate a hydraulic pressure by an electrical signal output in response to displacement of the brake pedal; and a hydraulic pressure control unit configured to deliver the hydraulic pressure discharged from the hydraulic pressure supply device to a wheel cylinder provided at each of wheels, wherein the reservoir includes a first reservoir chamber connected to the master cylinder and configured to supply the oil thereto, and a second reservoir chamber connected to the hydraulic pressure supply device, configured to supply the oil thereto and provided to be separated from the first reservoir chamber.