Brake Fluid Reservoir Float Testing via Negative Pressure
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Solution Overview
Problem
Conventional fluid level warning indicators in hydraulic brake systems and reservoirs lack a reliable method for testing the functionality of the fluid level detection system, which can lead to undetected fluid leaks or insufficient fluid levels, potentially causing brake failure.
Innovation Solution
A method involving a plunger mechanism that creates negative pressure to simulate fluid level changes, moving a float within the reservoir and using sensing elements to generate signals for a control unit or graphical user interface, confirming the fluid level indicator's functionality and ensuring proper brake fluid system operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluid volume detection sensor is installed in the reservoir tank to detect fluid level, then the fluid level can be monitored and displayed to users, but there is no reliable method to test the functionality of the fluid level detection system, leading to undetected sensor failures
Solution Approach 1:
The system uses its own plunger mechanism and negative pressure generation capability to perform self-testing of the fluid level detection system. The control unit automatically actuates the plunger to create negative pressure, moves the float, and verifies sensor functionality without requiring external testing equipment, thereby maintaining high reliability while avoiding additional testing system complexity.
Solution Approach 2:
The system performs preliminary testing of the fluid level detection mechanism by simulating fluid level changes through plunger actuation before actual operation. This preliminary action ensures the sensor and indicator systems are functioning correctly, preventing undetected failures during critical brake operations.
2Ease of operation
If the plunger is retracted to generate negative pressure for testing, then the float can be moved to simulate fluid level changes, but this requires coordination with solenoid valves and control units which increases system complexity
Solution Approach 1:
The plunger mechanism serves dual functions: it acts as a fluid transfer device during normal brake operation and as a testing actuator for the fluid level detection system. The same solenoid valves and control unit that manage brake fluid distribution are also used to coordinate the testing sequence, eliminating the need for separate testing mechanisms and reducing overall system complexity.
Solution Approach 2:
The testing functionality is merged with the existing brake control system components. The control unit integrates both brake operation control and fluid level testing sequences, using the same plunger, solenoid valves, and sensing elements for both primary brake function and self-testing operations, thereby simplifying the overall control architecture.
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 method allows for the reliable testing of the fluid level indicator system, ensuring the brake fluid system is functioning correctly and alerting users to any fluid level changes or leaks, thereby preventing brake failure.
Implementation Method 1
retracting the plunger from the second extended position towards the first retracted position thereby generating a negative pressure in a fluid passageway which connects the third chamber of the reservoir to the plunger chamber
Implementation Method 2
a fluid volume stream moves out of the third chamber which pulls the float from an upper position to a lower position within the guiding section
Data Source
AI summary
A testing method includes the steps of: (1) providing a negative pressure generator; (2) generating a negative pressure in a fluid passageway and a chamber which are in fluid communication with a guiding section of a fluid reservoir wherein a second sensing element is affixed to a guiding section of the fluid reservoir; (3) transferring a fluid flow stream from the guiding section to the chamber via the fluid passageway and drawing a float having a first sensing element from an upper position to a lower position within the guiding section; (4) generating a signal via the first and second sensing elements as the float moves relative to the second sensing element within the guiding section; and (5) transmitting a signal to at least one of a control unit or a graphical user display.