Hydraulic Brake Boosting via Deceleration Sensing
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Solution Overview
Problem
Current hydraulic brake systems without a master cylinder pressure sensor cannot implement a brake assistant function due to cost constraints, limiting the implementation of effective brake assistance technologies.
Innovation Solution
A method for hydraulic brake pressure boosting that generates a second pressure component based on vehicle deceleration values, using a detection device and a pressure generating device, which can include a brake booster and an electrically operated pump, to create an additional pressure component proportional to the first pressure component, and includes a plausibility check using a pressure sensor to ensure accurate pressure control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure sensor is installed to determine master cylinder pressure reliably for brake assistant function, then braking safety and reliability are improved, but system cost increases significantly
Solution Approach 1:
The patent introduces a deceleration sensor as an intermediary device that indirectly measures the effect of brake pressure (vehicle deceleration) rather than directly measuring pressure itself. This mediator allows the brake assistant function to be implemented without requiring expensive high-quality pressure sensors, as the deceleration data provides sufficient information to trigger appropriate braking assistance.
Solution Approach 2:
The patent replaces the mechanical pressure sensing system with a sensor-based deceleration measurement system. Instead of using pressure sensors to directly detect master cylinder pressure, the system uses deceleration sensors to detect the vehicle's motion changes caused by braking, thereby substituting a potentially cheaper sensor type for the expensive pressure sensing mechanism.
2Measurement precision
If high quality or redundant pressure sensors are installed to determine master cylinder pressure reliably, then brake assistant accuracy is improved, but production costs increase
Solution Approach 1:
The patent creates a functional copy of pressure measurement capability through deceleration sensing. Instead of directly measuring pressure with expensive sensors, the system measures the indirect effect (deceleration) and uses this information to achieve the same brake assistant function, effectively copying the measurement capability through a different physical quantity.
Solution Approach 2:
The patent changes the measured parameter from direct pressure to deceleration. By measuring a different physical parameter (deceleration instead of pressure) that correlates with brake application, the system achieves the necessary measurement precision for brake assistant functionality without requiring expensive pressure sensors.
3Ease of manufacture
If a brake assistant system is implemented in hydraulic brake systems without pressure sensors, then cost is reduced and retrofitting becomes possible, but measurement precision and reliability may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where deceleration data is continuously monitored and used to adjust brake assistant activation. The system uses the deceleration feedback to determine when panic braking is occurring and triggers appropriate assistance, maintaining reliability without requiring direct pressure measurement.
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 the integration of a hydraulic brake assistant into brake systems without a pressure sensor, reducing production costs and allowing for retrofitting of vehicles with ABS or ESP systems, while maintaining operational reliability and safety.
Implementation Method 1
detecting a deceleration value indicating a deceleration of the vehicle
Implementation Method 2
generating an additional second pressure component as a function of a second pressure value
Data Source
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AI summary
The invention relates to technology for hydraulic brake boosting in a hydraulic motor vehicle brake system, wherein a first pressure share of a brake pressure in the brake system is produced in a driver-controlled manner. A corresponding method comprises the steps of capturing a deceleration value indicating a deceleration of the vehicle and producing an additional second pressure share according to the deceleration value.