Variable Area Master Cylinder for Brake Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional brake devices for vehicles have a fixed effective cross-sectional area for the master cylinder, leading to increased manufacturing costs and product size when varying brake pressures, as the motor capacity must be adjusted to accommodate different operational conditions.
Innovation Solution
A brake device with a variable effective cross-sectional area for the master cylinder, utilizing a cylinder body with multiple chambers and a valve system to adjust the flow of brake oil, allowing the first and second effective cross-sectional areas to differ based on operational conditions, thereby reducing the motor capacity and size requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the master cylinder has a large inner diameter to generate low pressure with high response, then the response speed is improved, but the pressure generation capability in emergency situations deteriorates
Solution Approach 1:
The master cylinder employs a movable partition wall that can dynamically change the inner diameter of the cylinder between a first inner diameter (larger) and a second inner diameter (smaller). This dynamic structural change allows the system to adapt to different operational requirements: larger diameter for low-pressure high-response situations, and smaller diameter for high-pressure emergency situations, thereby resolving the contradiction between response speed and pressure generation capability.
Solution Approach 2:
The invention changes the geometric parameter (inner diameter) of the master cylinder by moving the partition wall between two positions. This parameter change enables the same physical cylinder to provide two different effective areas, allowing optimization of both response speed (larger area) and pressure generation (smaller area) without requiring two separate cylinders or increasing motor capacity.
2Stress or pressure
If the motor capacity is increased to generate high pressure in emergency situations, then the pressure generation capability is improved, but the manufacturing cost and product size increase
Solution Approach 1:
Instead of using a motor with excessive capacity to handle both low-pressure and high-pressure situations, the invention uses a motor with fixed (smaller) capacity combined with a movable partition wall that dynamically adjusts the cylinder's inner diameter. This allows the same motor to achieve both low-pressure high-response operation (with larger diameter) and high-pressure operation (with smaller diameter), thereby reducing manufacturing cost while maintaining pressure generation capability.
Solution Approach 2:
The cylinder is segmented into two chambers by a movable partition wall, creating two distinct effective areas. This segmentation allows the system to use a smaller motor capacity by optimizing the effective area according to operational needs, rather than requiring a large motor to handle the maximum pressure requirement in all situations.
3Stress or pressure
If the motor capacity is increased to accommodate varying pressure requirements, then the pressure generation capability is improved, but the product size increases
Solution Approach 1:
The movable partition wall enables dynamic adjustment of the cylinder's inner diameter, allowing the system to achieve variable pressure generation capability without increasing the overall product size. The motor maintains a fixed, smaller capacity, and the effective area is changed by moving the partition wall between two positions, thereby maintaining compact dimensions while accommodating varying pressure requirements.
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
Enables efficient generation of varying brake pressures without increasing motor capacity or size, ensuring fast response in low-pressure situations and high pressure generation in emergency scenarios, while reducing manufacturing costs and product weight.
Implementation Method 1
a first piston pressurizing brake oil while moving along the inside of the cylinder body
Implementation Method 2
a valve controlling the flow of the brake oil transferred along the pipe line part
Data Source
AI summary
A brake device for a vehicle includes: a cylinder body in which brake oil is compressed; a first piston pressurizing brake oil while moving along the inside of the cylinder body; a connection part having a smaller outer diameter than the first piston, and including one side connected to the first piston and the other side extended to the outside of the cylinder body; a pipe line part connecting the cylinder body and a wheel brake, and transferring the brake oil compressed through the movement of the connection part to the wheel brake; and a valve controlling the flow of the brake oil transferred along the pipe line part.