Simulator Valve with Unidirectional and Bidirectional Flow Passages
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Solution Overview
Problem
Existing electronic brake systems face challenges in efficiently generating a stable braking force while being cost-effective and easy to manufacture, particularly in the design of simulator valves used in these systems.
Innovation Solution
The proposed electronic brake system incorporates a simulator valve with a unidirectional flow passage and a bidirectional flow passage, utilizing a lip seal and armature mechanism to control fluid flow, allowing for efficient operation and low-cost manufacturing. The unidirectional flow passage is opened by pressure differences, while the bidirectional passage is electronically controlled, ensuring precise fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simulator valve is designed with complex structure to improve braking force stability, then braking force stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The valve body is divided into multiple flow passages (first flow passage, second flow passage, third flow passage) with distinct functions. Each passage handles specific fluid flow paths, allowing the complex braking control function to be achieved through modular segmentation rather than a single complex mechanism.
Solution Approach 2:
The simulator valve integrates multiple functions into a single component: it provides unidirectional flow control through the check valve, bidirectional flow control through the solenoid valve, and pressure regulation. This multi-functionality reduces the need for separate components, lowering manufacturing complexity while maintaining reliable braking force control.
2Reliability
If a simulator valve is designed with complex structure to improve braking force stability, then braking force stability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The check valve and solenoid valve are combined into a single integrated simulator valve assembly. The check valve inlet is communicatively coupled with the solenoid valve inlet, and both valves work together within the same valve body structure. This merging reduces the number of separate parts, simplifies assembly, and lowers manufacturing costs while maintaining stable braking force control.
Solution Approach 2:
The integrated valve design performs multiple functions (unidirectional flow control, bidirectional flow control, pressure regulation) within a single manufacturable component structure, making it easier to produce than multiple separate valves while ensuring reliable braking performance.
3Productivity
If fluid flow is controlled through multiple passages to improve braking efficiency, then braking efficiency is improved, but device complexity increases
Solution Approach 1:
The flow control function is segmented into three distinct passages: first flow passage for primary fluid supply, second flow passage for check valve operation, and third flow passage for solenoid valve control. This segmentation allows efficient braking control through dedicated flow paths while organizing complexity in a manageable structure.
Solution Approach 2:
The valve body structure serves multiple purposes: it houses all three flow passages, provides mounting for both check and solenoid valves, and manages fluid distribution to different outlets. This multi-functional design achieves efficient braking control without proportionally increasing complexity.
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 design enhances the efficiency and cost-effectiveness of the electronic brake system by providing a stable braking force and allowing for easy manufacturing, improving durability and preventing foreign material ingress through the use of a simulator valve with a check valve function.
Implementation Method 1
The unidirectional flow passage is opened, because the inclined protrusion is deformed inward when pressure of the pedal simulator is higher than pressure of the master cylinder
Implementation Method 2
The bidirectional flow passage is opened, because the armature moves by the magnet core receiving a current and the orifice is opened
Data Source
AI summary
A simulator valve and an electronic brake system using the same are disclosed. The electronic brake system includes a master cylinder provided with at least one cylinder chamber having a volume changeable according to operation of a pedal, a pedal simulator connected to the cylinder chamber, configured to provide reaction force corresponding to a pedal effort of the pedal, a hydraulic-pressure supply device configured to provide hydraulic pressure to at least one wheel cylinder, an electronic control unit (ECU) configured to operate the hydraulic-pressure supply device, and a simulator valve provided in a flow passage through which the master cylinder is connected to the pedal simulator, and provided with a unidirectional flow passage that allows fluid to flow from the pedal simulator to the cylinder chamber and a bidirectional flow passage that is electronically opened or closed.