Hydraulic Pressure Apparatus Sensor Magnetic Interference
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Solution Overview
Problem
Hydraulic pressure generating apparatuses face challenges in preventing the stroke sensor from being affected by the magnetic fields generated by solenoid valves, which complicates installation and assembly, especially in vehicles, and increases production costs due to the need for external pipings.
Innovation Solution
The apparatus integrates the master cylinder with the stroke sensor and positions the solenoid valves and pressure sensors in a way that they are spaced apart from the stroke sensor, both in the front-to-rear direction and vertically, to prevent magnetic interference, and configures the master cylinder, motor cylinder, and stroke simulator as compact units connected by hydraulic pressure lines within the base body, reducing the need for external pipings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the stroke sensor is disposed inside the base body near the solenoid valves, then the installation space is reduced, but the stroke sensor is affected by the magnetic field generated by the solenoid valves
Solution Approach 1:
The patent positions the stroke sensor and solenoid valves on different surfaces of the base body (front surface vs. rear surface), utilizing spatial dimensionality to separate the magnetic field source from the sensitive sensor while maintaining compact installation. This dimensional separation allows both components to be integrated into the base body without magnetic interference.
2Productivity
If the master cylinder and stroke sensor are integrated, then the assembly time and installation complexity are reduced, but the magnetic field interference problem persists
Solution Approach 1:
The master cylinder and stroke sensor are integrated into a single assembly unit that is mounted on the rear surface of the base body. This merging reduces the number of separate components and assembly steps, improving productivity while the integrated design allows for optimized positioning that minimizes magnetic field interference.
Solution Approach 2:
The integrated assembly is positioned on the rear surface of the base body, utilizing the depth dimension to separate it from the solenoid valves on the front surface. This spatial arrangement maintains the benefits of integration while preventing magnetic field interference.
3Device complexity
If external pipings are used to connect hydraulic components, then the internal base body structure is simpler, but the installation complexity and cost increase
Solution Approach 1:
The hydraulic pressure lines are integrated directly into the base body structure, merging the piping function with the base body. This eliminates the need for separate external pipings, reducing installation complexity and cost while maintaining a relatively simple internal structure through unified design.
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 simplifies the installation of the hydraulic pressure generating apparatus in vehicles, reduces assembly time, and minimizes the impact of magnetic fields on the stroke sensor, while also reducing production costs by eliminating or minimizing external pipings.
Implementation Method 1
The stroke sensor may be a magnetic sensor that detects a change in magnetic field, that is, a change in magnetic field caused by a rod that is moving
Implementation Method 2
the stroke sensor which is disposed in the interior of a base body may be affected by a magnetic field generated from the electromagnetic valve
Data Source
AI summary
One embodiment provides a hydraulic pressure generating apparatus including: a base body; a master cylinder; and a stroke sensor, wherein a rear surface of the base body faces a brake operator, a bottomed-cylindrical-shaped first cylinder bore accommodating a first piston of the master cylinder is opened to the rear surface of the base body, and an input member connected to the brake operator is inserted in the first cylinder bore. The stroke sensor, plural solenoid valves and a control unit are attached to one surface of the base body, such that the stroke sensor and the solenoid valves are accommodated within a housing of the control unit. On the one surface, the stroke sensor is disposed adjacent to the rear surface of the base body, and the solenoid valves are disposed adjacent to a front surface of the base body.