DOR Cooler Monitoring via Temperature Curve Analysis
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Solution Overview
Problem
Existing methods for monitoring the operation of ozone-oxygen conversion systems in vehicles, particularly the installation site and functionality of catalytically coated DOR coolers, are inefficient at lower temperatures and prone to manipulation, failing to reliably detect system faults and ensure regulatory compliance.
Innovation Solution
A method and device that evaluate the temperature characteristics of the heat exchanger outlet and DOR sensor over a defined time interval, forming a relation between the two curves to generate a validity signal, using area differences and quotients compared to setpoint ranges, allowing for reliable diagnosis and fault detection even at lower temperatures with reduced technical effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature characteristics are evaluated using conventional methods, then installation monitoring is possible, but the system becomes vulnerable to manipulation and fails at lower temperatures
Solution Approach 1:
The system continuously monitors temperature characteristics and compares them against expected patterns to generate feedback signals. When temperature gradients deviate from expected ranges or patterns, the system generates diagnostic signals indicating potential manipulation or malfunction, creating a feedback loop that detects harmful factors in real-time
Solution Approach 2:
The patent replaces simple mechanical temperature sensing with an electronic evaluation system that processes temperature characteristics electronically. The evaluation of temperature gradients, areas under curves, and temporal patterns is performed through electronic control units, making the system more resistant to physical manipulation while maintaining monitoring capabilities
2Adaptability or versatility
If temperature monitoring is performed at lower temperatures, then broader operational range is achieved, but detection precision deteriorates
Solution Approach 1:
The system transitions from monitoring temperature at a single point to evaluating temperature characteristics across multiple dimensions: spatial temperature gradients, temporal temperature patterns, and areas under temperature-time curves. This multi-dimensional evaluation maintains precision even at lower temperatures by capturing the overall thermal behavior pattern rather than relying on single-point measurements
Solution Approach 2:
The patent changes the evaluation parameters from simple temperature values to temperature gradients, area under curves, and temporal characteristics. By transforming the measurement approach to evaluate the rate of change and integrated behavior of temperature over time and space, the system maintains detection precision across a broader temperature range including lower temperatures
3Reliability
If complex monitoring systems are implemented, then detection capability improves, but device complexity increases
Solution Approach 1:
The evaluation system is designed to perform multiple monitoring functions using a unified approach. The same electronic control unit evaluates installation correctness, detects manipulation attempts, monitors operational status, and generates diagnostic signals all through processing temperature characteristics. This multi-functionality reduces overall system complexity compared to having separate dedicated systems for each monitoring task
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 reliable detection of DOR system functionality and prevention of manipulation, satisfying regulatory requirements by effectively diagnosing correct installation and operation across a broader temperature range with reduced complexity and effort.
Implementation Method 1
a so-called DOR (Direct Ozone Reduction) cooler (for example, PremAIR® cooler). This catalytically coated cooler converts the ozone O3 which occurs at ground level and which is contained in the air flowing through it into oxygen O2 by the heat energy of a radiator
Implementation Method 2
a catalytically coated heat exchanger through or around which air flows and through which a heat exchange medium flows
Data Source
AI summary
A method of monitoring a heat exchanger of a vehicle, coated with an ozone-oxygen conversion material, including detecting the heat exchange medium temperature (tka) and heat exchange temperature (tprem) and plotting the values as a function of time, determining the area value (atka) of the heat exchange medium temperature, comparing the value of the heat exchange medium temperature with a setpoint value, repeating the foregoing steps if the sensed value is negative relative to the setpoint value, devising a quotient of the area values of such temperature, comparing the devised quotient with a defined setpoint range (RA) and determining whether such devised quotient falls within or without such defined setpoint range.