Vehicle Height Sensor Correction for Acceleration-Adaptive Ride Control
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Solution Overview
Problem
Existing methods for ride height control in motor vehicles are inefficient due to the need for empirical determination of correction values for acceleration-dependent height changes, which are complex and not fully adaptable to individual vehicle variations and aging components, leading to unnecessary control processes and reduced safety and comfort.
Innovation Solution
An automated method for adjusting acceleration-dependent height correction values for motor vehicles, using a reference height value and iterative averaging or weighting of height changes during vehicle operation to create an adaptive correction value characteristic curve, reducing unwanted ride height control processes and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If empirical determination of correction values is used for acceleration-dependent height changes, then initial ride height control can be achieved, but the correction values are not fully adaptable to individual vehicle variations and aging components, leading to unnecessary control processes
Solution Approach 1:
The system performs self-calibration by automatically determining correction values during vehicle operation through iterative measurement and evaluation of height changes during acceleration, eliminating the need for manual empirical determination and enabling continuous adaptation to individual vehicle characteristics and aging components
Solution Approach 2:
The control unit continuously monitors actual height values during acceleration, compares them with target values, and iteratively adjusts correction values based on the deviations detected, creating a closed-loop feedback system that adapts to individual vehicle variations and aging
2Reliability
If acceleration-dependent correction values are not adjusted, then the system structure remains simple, but unnecessary ride height control processes occur during acceleration, reducing safety and comfort
Solution Approach 1:
The control unit automatically performs the complex task of determining and adjusting correction values through iterative measurement and evaluation during vehicle operation, eliminating the need for complex manual calibration procedures while improving safety and comfort
Solution Approach 2:
The system determines correction values in advance during vehicle operation and stores them for future use, so that when acceleration occurs, the appropriate correction is already available, preventing unnecessary control processes and improving response time
3Measurement precision
If multiple control processes are performed for ride height adjustment during acceleration, then height control accuracy can be improved, but energy consumption increases and system wear increases
Solution Approach 1:
The control unit determines and stores correction values during normal vehicle operation when energy consumption is lower, preparing the system in advance so that during acceleration the pre-determined correction values can be applied immediately without requiring multiple iterative control processes, thus reducing energy consumption
Data Source
AI summary
Method for correcting a height value, measured using a height sensor, of a spring-damper unit of a motor vehicle, wherein the measured height value is corrected by a correction value that is dependent on an acceleration value if the motor vehicle is accelerated in a longitudinal and/or lateral direction, the correction value being adjusted while the motor vehicle is moving.