Brake Unit Vibration Isolation via Elastic Mounts
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Solution Overview
Problem
Conventional brake units transmit vibration to the vehicle body, causing discomfort and noise, particularly in vehicles without an engine where the influence on the driver is significant.
Innovation Solution
The brake unit integrates a master cylinder unit and a pump unit, with the latter being elastically fixed to the former using vibration-absorbing mounts, and both units are designed as independent components to minimize vibration transmission. The pump unit is positioned to be separate from the vehicle body, and flexible connection pipes are used to further reduce vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pump unit is rigidly fixed to the vehicle body, then the structural stability is improved, but the vibration transmission to the vehicle body increases
Solution Approach 1:
The patent introduces vibration-absorbing mounts as intermediary elements between the pump unit and the vehicle body. These mounts serve as a mediator that decouples the rigid connection, allowing the pump unit to be securely mounted while preventing vibration transmission to the vehicle body and master cylinder unit.
Solution Approach 2:
The patent extracts the vibration-generating pump unit from direct contact with the vehicle body and master cylinder unit by positioning it separately and connecting it only through flexible hoses. This separation removes the vibration source from the rigid structure, preventing vibration transmission while maintaining functional connectivity.
2Device complexity
If the pump unit is integrated with the master cylinder unit, then the device complexity is reduced, but the vibration transmission to the master cylinder unit increases
Solution Approach 1:
The patent segments the braking system into distinct functional units: the master cylinder unit and the pump unit. By keeping these units separate and connected only through flexible hoses, the design prevents vibration transmission from the pump to the master cylinder while maintaining system functionality. This segmentation resolves the contradiction by prioritizing vibration isolation over structural integration.
3Object-affected harmful factors
If the brake units are elastically fixed, then the vibration transmission is suppressed, but the structural stability decreases
Solution Approach 1:
The vibration-absorbing mounts act as intermediary elements that provide elastic fixation for the pump unit. These mounts reduce vibration transmission to the vehicle body and master cylinder unit while maintaining sufficient structural stability to secure the pump unit in its designated position and support its operational loads.
Solution Approach 2:
The patent employs flexible hoses to connect the pump unit to the master cylinder unit, replacing rigid mechanical connections. These flexible connections allow for elastic fixation that suppresses vibration transmission while maintaining the necessary structural integrity for fluid transmission and system stability.
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 effectively suppresses the transmission of vibration and noise from the pump unit to the vehicle body, enhancing the braking system's silence and comfort by isolating the vibration source from the driver and vehicle interior.
Implementation Method 1
both units are elastically fixed
Implementation Method 2
The both units are elastically fixed
Implementation Method 3
flexible connection pipes are used to further reduce vibration transfer
Data Source
AI summary
A brake unit (1) includes: a master cylinder (2) unit which is fixed to a vehicle body, and which includes a master cylinder (2b) that is received within a first housing (20), and that is arranged to be interlocked with a brake pedal; and a pump unit (3) which is arranged to be driven by a motor (3), and which includes a second housing (30) within which a pump arranged to increase a wheel cylinder pressure is received, the master cylinder unit (2) and the pump unit (3) being integrally fixed through a mount (6) which is an elastic member.