Hydraulic Control Device Positioning for Scooter ABS Stability
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Solution Overview
Problem
The conventional antilock brake device in scooters, with its hydraulic control device positioned at a high and forward part of the vehicle body, affects driving stability and increases weight and cost due to a large bracket size, which interferes with the front fork's rotation and is not centered around the vehicle's gravity center.
Innovation Solution
The hydraulic control device is positioned below the seating seat, behind the seat hinge, and close to the cylinder unit, with a motor and hydraulic pump driven by the motor to control hydraulic pressure, reducing the need for a large bracket and improving stability by concentrating mass near the vehicle's gravity center.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hydraulic control device is disposed at a high position at the front part of the vehicle body, then the antilock brake device can be effectively implemented, but the driving stability deteriorates due to the mass being far from the gravity center
Solution Approach 1:
The hydraulic control device is relocated from the front high position to the lower rear position beneath the seating seat, changing both the vertical and longitudinal dimensions of placement. This dimensional relocation moves the mass closer to the vehicle's gravity center, improving driving stability while maintaining the antilock brake function through proper hydraulic line routing and positioning near the cylinder unit.
2Reliability
If the hydraulic control device is disposed at the front part of the vehicle body, then the antilock brake device can be installed, but the bracket size increases leading to weight and cost increase
Solution Approach 1:
By relocating the hydraulic control device to the lower rear position beneath the seating seat, the bracket can be integrated into the existing frame structure in a space-efficient manner. This dimensional relocation eliminates the need for a large forward-extending bracket, reducing both weight and manufacturing cost while maintaining functional effectiveness.
3Reliability
If the hydraulic control device is disposed at the front part of the vehicle body, then the antilock brake device can be installed, but the bracket becomes large interfering with the front fork rotation
Solution Approach 1:
The hydraulic control device is relocated from the front high position to the lower rear position beneath the seating seat, behind the seat hinge. This dimensional relocation completely eliminates interference with front fork rotation while maintaining antilock brake functionality through proximity to the cylinder unit and proper hydraulic line routing.
4Reliability
If the hydraulic control device is disposed at a high position, then the antilock brake device can be installed, but the manufacturing cost increases due to larger bracket requirements
Solution Approach 1:
By relocating the hydraulic control device to the lower rear position beneath the seating seat, the bracket design can be simplified and integrated into existing frame structures. This dimensional relocation reduces material requirements and manufacturing complexity, lowering production costs while maintaining effective antilock brake functionality.
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 enhances driving stability by lowering the gravity center, reduces weight and manufacturing costs, and maintains lateral balance, allowing for a more compact and efficient antilock brake system.
Implementation Method 1
an antilock brake device having a hydraulic control device which includes a motor (50a) and a hydraulic pump (50b) driven by the motor (50a) and controls a hydraulic pressure of a hydraulic brake to prevent the wheels from being locked
Data Source
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AI summary
A scooter-type motor cycle (100) includes: a unit swing-type engine (33) which has a cylinder unit (35) extending in a front-rear direction under a seating seat (14), integrally includes a power transmission device (40) which extends rearward from one side in a left-right direction of a crankcase to transmit a power to a rear wheel , and is supported so as to be vertically swingable relative to a vehicle body; and an antilock brake device having a hydraulic control device (50) which controls a hydraulic pressure of a hydraulic brake to prevent the wheels from being locked, wherein the hydraulic control device (50) is disposed at a position that is below the seating seat (14) and is the other side in the left-right direction of the vehicle body, and is above a side of the cylinder unit (35). Therefore, the mass can be concentrated to the vicinity of the gravity center of the vehicle body, which can improve driving stability.