Pivot Mounting for Master Brake Cylinder Angular Movement
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Solution Overview
Problem
Existing master brake cylinder mounting arrangements fix the orientation relative to the firewall, limiting the angular movement of the push rod, which affects braking performance due to non-linear brake pedal movement.
Innovation Solution
A master brake cylinder design with a pivotally movable piston and push rod assembly, where the push rod is fixed to the piston and extends through a threaded bushing, allowing the cylinder to pivot relative to the firewall by up to 15 degrees, ensuring secure mounting and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the master brake cylinder orientation is fixed relative to the firewall, then the mounting structure is simple and stable, but the push rod cannot accommodate angular movement required by non-linear brake pedal movement
Solution Approach 1:
The mounting bracket incorporates a pivot connection that allows the master brake cylinder to rotate dynamically relative to the firewall, enabling the push rod to accommodate angular movements during brake pedal operation while maintaining a relatively simple mounting structure
2Reliability
If a pivot connection is used for the push rod to accommodate angular movement, then the braking function is improved, but the mounting structure becomes more complex and less secure
Solution Approach 1:
The pivot connection is integrated into the mounting bracket itself rather than being a separate component, allowing the master brake cylinder to pivot as a unified assembly with the bracket, thereby improving braking reliability through proper angular accommodation while minimizing additional structural complexity
Solution Approach 2:
The mounting bracket combines both the mounting function and the pivot connection function into a single integrated component, eliminating the need for separate pivot mechanisms and reducing overall structural complexity while maintaining reliable braking performance
3Reliability
If the master brake cylinder is securely mounted to the firewall, then the firewall port is isolated from the engine compartment, but the cylinder requires excessive space in the engine compartment
Solution Approach 1:
The pivotable mounting allows the master brake cylinder to be positioned at an optimal angle that reduces its projected footprint in the engine compartment while maintaining secure attachment and effective sealing of the firewall port
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 design enhances braking performance by accommodating angular changes in the push rod movement, providing a secure and compact mounting solution that isolates the firewall port from the engine compartment, ensuring effective brake fluid pressure modulation.
Implementation Method 1
a spring biased piston movable in the cylinder to pressurize the brake fluid in one direction of movement of the piston and to remove brake fluid pressure when the piston is moved in an opposite direction
Implementation Method 2
The bushing includes an extending segment having an exposed threaded exterior surface that receives and cooperates with a ball member threaded on the extension
Data Source
AI summary
A master brake cylinder includes a unique mounting arrangement for securing thereof to a firewall of a vehicle and a particular porting arrangement. A cylinder sleeve includes a series of ports that cooperate with movement of the piston allowing for by-passing of the piston at one end position and then movement of the piston past the ports for brake actuation. Additionally a two stage pressure intensifier is provided that is in-line between a master brake cylinder and brake pistons. The intensifier also includes a by-pass position at one end of the movable piston having a differential area between a forward and a rear face of the piston.