Hydraulic Interface for Motorized Pressure Build-up Devices
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Solution Overview
Problem
Existing vehicle braking systems face challenges in reliable communication between motorized pressure build-up devices, particularly in the absence of electrical communication systems, which can lead to critical driving situations during electrical failures.
Innovation Solution
A hydraulic interface is introduced between motorized pressure build-up devices in a vehicle braking system, enabling bidirectional communication through sinusoidal or binary pressure change signals, allowing for information transmission even in complete electrical communication failure scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If electrical communication systems (vehicle bus system) are used for communication between motorized pressure build-up devices, then communication speed and information transmission capability are improved, but system reliability deteriorates due to vulnerability to electrical failures
Solution Approach 1:
The patent introduces a hydraulic intermediary system that converts electrical control signals into hydraulic pressure signals, which then actuate the second motorized pressure build-up device. This hydraulic mediation layer isolates the two devices from direct electrical communication dependency, allowing the second device to be controlled through hydraulic pressure changes generated by the first device, thereby maintaining operation during electrical communication failures.
Solution Approach 2:
The patent employs hydraulic pressure as the communication medium between the two motorized pressure build-up devices. The first device generates hydraulic pressure signals that are transmitted through the braking system's hydraulic fluid to the second device, replacing vulnerable electrical communication with a hydraulic signaling mechanism that remains functional during electrical failures.
2Reliability
If a hydraulic interface is introduced for bidirectional communication between motorized pressure build-up devices, then reliability is improved by enabling operation during electrical failures, but device complexity increases
Solution Approach 1:
The patent makes the motorized pressure build-up devices multi-functional by enabling them to operate in dual modes: normal electrical control mode and hydraulic communication mode. The same hardware components (motors, pressure build-up mechanisms) serve both their primary braking function and their secondary function as hydraulic signal generators and receivers, eliminating the need for separate dedicated hydraulic communication hardware.
Solution Approach 2:
The system utilizes the braking system's existing hydraulic fluid and pressure build-up capabilities to serve the dual purpose of both brake actuation and inter-device communication. The hydraulic infrastructure already present in the braking system is repurposed to carry communication signals, eliminating the need for separate communication infrastructure and reducing overall system complexity.
3Measurement precision
If sinusoidal or binary pressure change signals are used for information transmission, then measurement precision is improved for information encoding, but the complexity of detecting and measuring these signals increases
Solution Approach 1:
The patent employs periodic pressure variations (sinusoidal or binary patterns) to encode information signals. By modulating the pressure build-up device's output pressure in regular periodic patterns, complex information can be transmitted through simple on/off or analog pressure variations that are easily distinguishable by pressure sensors, achieving high information density without requiring complex signal generation hardware.
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 solution ensures reliable brake application and extended functionality of motorized pressure build-up devices by maintaining communication and adapting to error scenarios, even in the absence of electrical systems, thereby enhancing safety and reducing the risk of critical driving situations.
Implementation Method 1
the pressure prevailing in the at least partial volume of the braking system is varied in accordance with a sinusoidal or binary pressure change signal, which is interpretable as the respective first piece of information for the activation device using the second pressure sensor unit
Implementation Method 2
which is interpretable as the respective first piece of information for the activation device using the second pressure sensor unit
Data Source
AI summary
A control device for a first motorized pressure build-up device of a braking system of a vehicle. The control device is designed to output at least one first piece of information to an activation device of a second motorized pressure build-up device of the braking system by, under consideration of the respective first piece of information, a first motor activatable in such a way that a pressure prevailing in at least one partial volume of the braking system is varied in accordance with a pressure change signal, which is interpretable as the respective first piece of information for the activation device using a second pressure sensor unit of the second motorized pressure build-up device.