Brake Fluid Pressure Control Device with Segmented Passages
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Solution Overview
Problem
Conventional brake fluid pressure control devices for vehicles have limited design freedom for fluid passages due to the shared use of passages for both suction and discharge, restricting the enlargement of the suction hole diameter and thus limiting the efficiency of the plunger pump.
Innovation Solution
The design separates the inflow and suction holes, allowing for independent adjustment of their cross-sectional areas, and positions the discharge valve off-center to create a damping chamber, enhancing the suction and discharge efficiencies while enabling miniaturization and efficient use of space within the base unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same fluid passage is used for both suction and discharge, then the device complexity is reduced, but the degree of freedom for designing fluid passage is limited
Solution Approach 1:
The patent divides the fluid passage into separate suction hole and discharge hole within the base unit. This segmentation allows independent design and optimization of each passage, enabling the suction hole to be enlarged for better pump efficiency while the discharge hole can be positioned to create damping chambers, thus resolving the contradiction between simplified structure and design freedom.
2Productivity
If the suction hole cross-sectional area is enlarged to enhance plunger pump efficiency, then the productivity is improved, but the device complexity increases due to additional design constraints
Solution Approach 1:
By separating the suction hole from the discharge hole, the patent enables independent enlargement of the suction hole cross-sectional area without being constrained by discharge requirements. This directly improves plunger pump efficiency while the segmented design actually reduces overall complexity by allowing each passage to be optimized independently.
Solution Approach 2:
The patent applies different design qualities to different locations: the suction hole is designed with large cross-sectional area for high flow capacity, while the discharge hole is positioned to create damping chambers for surge suppression. This local optimization resolves the contradiction by allowing each region to have specialized characteristics.
3Object-affected harmful factors
If the discharge valve is positioned off-center to create damping chamber, then the harmful factors are reduced, but the device complexity increases
Solution Approach 1:
The patent converts the potential harm of fluid surging into a benefit by using the discharge valve's off-center position to create a damping chamber. The space between the valve and the hole wall, which could be considered wasted space, is actually utilized as a damping chamber to suppress fluid surging, thus converting a design constraint into a harmful factor reduction mechanism.
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 improves the suction and discharge efficiencies of the plunger pump, allows for more flexible fluid passage design, and reduces manufacturing costs by sharing parts, while effectively damping fluid surging and optimizing space usage.
Implementation Method 1
a suction valve that allows only an inflow of the brake fluid into the cylinder hole
Implementation Method 2
a discharge valve that allows only a discharge of the brake fluid from the cylinder hole
Implementation Method 3
a plunger pump that suctions the brake fluid stored in the reservoir
Data Source
AI summary
A brake fluid pressure control device (U) has a base unit (100) including: an inlet valve mounting hole (34); an outlet valve mounting hole (35); a reservoir hole (33); a cylinder hole (32) into which a plunger (1c) is inserted to freely slide in the cylinder hole (32); an inflow hole (45) that connects the outlet valve mounting hole (35) and the reservoir hole (33); a suction hole (46) that connects the reservoir hole (33) and the cylinder hole (32); and a discharge hole (41) that connects the cylinder hole (32) and the inlet valve mounting hole (34), wherein the suction hole (46) is configured to be inserted with a suction valve (6) that allows only an inflow of the brake fluid into the cylinder hole (32), wherein the discharge hole (41) is configured to be inserted with a discharge valve (7) that allows only a discharge of the brake fluid from the cylinder hole (32), and wherein the inflow hole (45) and the suction hole (46) are arranged to be substantially in parallel with each other.