Integrated Braking System Pressure Equalization
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Solution Overview
Problem
Integrated braking systems face issues with durability and valve operation noise, particularly due to frequent operation of shutoff valves, which can lead to plunger impact noise and reduced durability, and slower response times when the brake pedal is quickly depressed.
Innovation Solution
The system includes a direct flow path connecting the pressure generating unit's hydraulic chambers and the pressure medium storage unit, utilizing seal cups and check valves to equalize pressures and maintain atmospheric pressure, reducing the need for constant shutoff valve operation and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shutoff valves are frequently operated to maintain pressure balance, then pressure control is improved, but valve durability deteriorates and operation noise increases
Solution Approach 1:
A communication hole is introduced as an intermediary element that directly connects the first and second hydraulic chambers, allowing pressure equalization without requiring valve intervention. This mediator enables pressure balance while eliminating the wear and noise associated with frequent valve operations.
Solution Approach 2:
The invention extracts the pressure equalization function from the shutoff valve by providing a separate communication path through the communication hole. This separates the pressure balancing function from the valve operation, allowing the valve to focus solely on flow control while the communication hole handles pressure equalization.
2Reliability
If shutoff valves are frequently operated to maintain pressure balance, then pressure control is improved, but operation noise increases
Solution Approach 1:
The communication hole acts as a silent intermediary that enables pressure equalization without mechanical movement. By routing pressure balance through this fixed opening rather than through operating valves, the system eliminates plunger impact noise while maintaining pressure control.
3Device complexity
If shutoff valves respond slowly to brake pedal depression, then valve simplicity is maintained, but brake response time deteriorates
Solution Approach 1:
The communication hole is pre-configured to allow immediate pressure equalization when needed, eliminating the delay associated with valve activation. This preliminary structural arrangement ensures that pressure balancing occurs instantly in response to brake pedal depression, improving response time without adding complex control mechanisms.
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 significantly reduces operation noise and improves the durability of shutoff valves, ensuring smoother and more responsive brake pedal operation, even during quick depressions.
Implementation Method 1
A check valve may be provided at a flow path connecting the first hydraulic line and the pressure medium storage unit
Implementation Method 2
Two seal cups may be provided at an inner wall of the housing, and a flow path connected to the hydraulic line may be provided between the seal cups
Data Source
AI summary
Disclosed is an integrated braking system including a hydraulic piston cylinder unit that is operated by a brake pedal, a pressure medium storage unit that is connected to the hydraulic piston cylinder unit, a pressure generating unit that is driven by a motor, and has first and second hydraulic chambers that are divided by a piston movable within a housing, and a pressure control unit that transmits a pressure to a wheel unit from the hydraulic piston cylinder unit and the pressure generating unit. A hydraulic line directly connects the first hydraulic chamber and the pressure medium storage unit.