ABS Modulator Mounting on Down Frame
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Solution Overview
Problem
The placement of an ABS modulator between a pair of right and left upper frames in a saddle-type vehicle complicates its attachment and detachment, and restricts the design freedom of the body frame.
Innovation Solution
The ABS modulator is mounted on the down frame within the leg shield, offset to the left side, with the main harness running in front of a battery, allowing for easier attachment and detachment, and improving design flexibility by utilizing previously unused space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ABS modulator is placed between a pair of right and left upper frames, then the ABS modulator can be securely mounted, but the attachment and detachment become complicated and the degree of freedom in the design of the body frame is reduced
Solution Approach 1:
The ABS modulator is extracted from the conventional placement location (between upper frames) and relocated to a new position (on the down frame within the leg shield). This extraction resolves the contradiction by removing the conflict between secure mounting and ease of attachment/detachment, as the new location provides both secure mounting points on the down frame and accessible positioning within the leg shield area.
Solution Approach 2:
The ABS modulator is relocated from a horizontal placement between frames to a vertical placement on the down frame within the leg shield. This dimensional change in positioning strategy allows the modulator to be securely mounted on the down frame structure while being accessible within the leg shield volume, thereby simplifying attachment and detachment procedures while maintaining secure mounting.
2Shape
If the ABS modulator is placed between a pair of right and left upper frames, then the ABS modulator can be positioned centrally, but the degree of freedom in the design of the body frame is reduced
Solution Approach 1:
The ABS modulator is extracted from the central placement location between upper frames and repositioned to the down frame within the leg shield. This extraction eliminates the constraint on body frame design freedom while maintaining functional effectiveness, as the modulator remains centrally accessible within the leg shield area without restricting frame configuration options.
Solution Approach 2:
The vehicle frame structure is segmented into distinct functional zones: the upper frame area for structural components and the down frame/leg shield area for the ABS modulator. This segmentation allows independent optimization of each zone, enabling central positioning of the modulator within the leg shield while maintaining full design freedom for the upper frame and body structure.
3Device complexity
If the main harness is routed through the center of the vehicle, then electrical connections are simplified, but space for the ABS modulator is reduced
Solution Approach 1:
The main harness routing is positioned asymmetrically to the right of the down frame centerline, creating an asymmetric spatial arrangement that deliberately leaves the left side (within the leg shield) available for ABS modulator installation. This asymmetric routing strategy resolves the contradiction by sacrificing minimal routing complexity for significant gain in available installation space.
Solution Approach 2:
The harness routing problem is solved by transitioning from a horizontal centerline routing approach to a vertical/diagonal routing approach along the right side of the down frame. This dimensional change in routing strategy creates sufficient clearance within the leg shield volume for ABS modulator installation while maintaining acceptable electrical connection complexity through structured harness management.
Data Source
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AI summary
A saddle-type vehicle (10) includes: a leg shield (56) that covers a down frame (16) extending backward and downward from a head pipe (14) pivotally supporting a steering system (21) and that also covers legs of a rider from front; a front wheel (28) mounted at a lower end of the steering system (21); a hydraulic front wheel brake device (72) for applying braking force to the front wheel (28); and an ABS modulator (90) for adjusting the braking force of the front wheel brake device (72). The ABS modulator (90) is mounted on the down frame (16) within the leg shield (56) while being offset to one side of the down frame (16) in a right-left direction.