Hydraulic Pressure Generating Device Stroke Sensor Integration
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Solution Overview
Problem
Existing hydraulic pressure generating devices for vehicle brake systems face challenges in securing space and protecting stroke sensors, leading to increased complexity and cost due to separate sensor installation and signal line requirements.
Innovation Solution
The hydraulic pressure generating device integrates a stroke sensor within a housing attached to the base body, with the sensor electrically connected to a control board, reducing the device's size and allowing for easier mounting while providing protection through a facing wall portion, thus eliminating the need for separate sensor installation and signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stroke sensor is installed outside the hydraulic pressure generating device, then the device structure is simple, but the space required for mounting increases and the sensor needs additional protection
Solution Approach 1:
The stroke sensor is integrated into the housing of the hydraulic pressure generating device, combining the sensor and the hydraulic device into a single unit. This eliminates the need for separate sensor mounting space while maintaining the simplicity of the overall structure.
Solution Approach 2:
The stroke sensor is placed inside the housing of the hydraulic pressure generating device, nesting the sensor within the existing structure. This allows the sensor to be protected and mounted without requiring additional external space.
2Ease of repair
If the stroke sensor is installed outside the hydraulic pressure generating device, then the sensor is accessible for maintenance, but the sensor is exposed to external damage and contamination
Solution Approach 1:
The stroke sensor is nested within the protective housing, which shields it from external damage and contamination while still allowing for maintenance access when needed.
Solution Approach 2:
The housing acts as a protective shell that encloses the stroke sensor, providing mechanical protection and contamination prevention while maintaining access pathways for maintenance operations.
3Area of stationary object
If the stroke sensor is integrated inside the housing, then the mounting space is reduced and the sensor is protected, but the assembly complexity increases
Solution Approach 1:
The stroke sensor and housing are designed as an integrated assembly, reducing the number of separate components and simplifying the overall assembly process despite the increased integration.
Solution Approach 2:
The housing serves multiple functions: it encloses the stroke sensor, provides mechanical protection, prevents contamination, and facilitates mounting. This multi-functionality reduces the need for additional protective structures.
4Adaptability or versatility
If separate signal lines are used to connect the stroke sensor to the control board, then the sensor can be positioned flexibly, but the device complexity and manufacturing cost increase
Solution Approach 1:
The stroke sensor and control board are integrated within the same housing structure, eliminating the need for external signal lines and reducing the overall device complexity and manufacturing cost.
Solution Approach 2:
The signal transmission function is extracted from external wiring and integrated directly into the housing structure, removing the complexity of separate signal lines while maintaining electrical connectivity.
Data Source
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AI summary
A hydraulic pressure generating device (1) includes a base body (100), a master cylinder (10) provided in the base body (100) and configured to generate a brake hydraulic pressure by a first piston (12b) connected to a brake operating element (P), a housing (91) of an electronic control unit (90) attached to the base body (100), a control board (94) contained in the housing (91), a stroke sensor (77) configured to detect an amount of movement of the first piston (12b) and a detection object member (78) which is detected by the stroke sensor (77). The housing (91) has a facing wall portion (91b) provided so as to face the base body (100). The stroke sensor (77) is provided inside the housing (91) on the opposite side of the facing wall portion (91b) as the base body (100) and is electrically connected to the control board (94).