Dosing Device Cleaning via Segmented Media Cycles
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Solution Overview
Problem
Existing dosing devices for internal combustion engines face challenges in effectively cleaning components from medium residues, leading to contamination and operational issues, particularly due to crystallization and deposits.
Innovation Solution
A dosing device with a conditioning system that utilizes two distinct media, one for cleaning, and a sensor to monitor contamination levels, allowing for targeted cleaning by adjusting the flow of these media to prevent and address contamination effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single cleaning medium is used to clean the dosing device, then the cleaning process is simple, but it cannot effectively remove all types of contaminants and residues
Solution Approach 1:
The cleaning process is segmented into multiple stages using different cleaning media: a first cleaning medium (e.g., water) for initial contamination removal, and a second cleaning medium (e.g., solvent) for residue dissolution. This segmentation allows each medium to perform its specialized function, achieving both comprehensive cleaning effectiveness and process simplicity through structured multi-step operation.
2Reliability
If cleaning media are supplied continuously, then the dosing device remains clean, but the complexity of the supply system increases
Solution Approach 1:
Instead of continuous supply, the cleaning media are supplied periodically in alternating cycles. The control device switches between the first and second cleaning media based on operational conditions, achieving effective cleaning while simplifying the supply system through periodic rather than continuous operation.
3Reliability
If the dosing device is cleaned frequently, then contamination is prevented, but operational time is reduced
Solution Approach 1:
A sensor detects contamination levels in real-time and provides feedback to the control device. The control device activates cleaning only when contamination thresholds are exceeded, rather than on fixed schedules. This feedback-based approach prevents contamination effectively while minimizing unnecessary cleaning operations, thus preserving operational time.
4Reliability
If multiple cleaning media are used, then cleaning effectiveness improves, but the device complexity increases
Solution Approach 1:
The control device serves multiple functions: it manages the dosing operation, monitors contamination via sensors, controls the switching between different cleaning media, and coordinates the alternating cleaning cycles. This multi-functionality consolidates the complexity into a single control unit rather than requiring separate control systems for each function, achieving effective multi-medium cleaning without proportionally increasing overall device complexity.
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
The solution enables efficient cleaning of the dosing device and exhaust system components, preventing damage from deposits and ensuring optimal operation by using air and a solvent to remove contaminants and dissolve residues, thereby maintaining system performance.
Implementation Method 1
a first medium and a second medium can be fed to a conditioning device (2) via a central line (10) of the conditioning device (2), via which the first medium and/or the second medium can be introduced into an exhaust system
Implementation Method 2
The second and third medium enable the conditioning device (2) and/or the dispensing device (3) to be cleaned of components of the first medium
Data Source
AI summary
Metering apparatus for the metered dispensing of a first medium into an exhaust gas system of an internal combustion engine, having a conditioning apparatus (2) which can be fed with the first medium (HWL) and a second medium and a dispensing apparatus (3) which is connected to the conditioning apparatus (2) and via which the first medium (HWL) and/or the second medium can be introduced into the exhaust gas system, wherein cleaning of the conditioning apparatus (2) and/or the dispensing apparatus (3) of constituent parts of the first medium (HWL) is made possible by the second medium. According to the invention, a third medium can be fed to the conditioning apparatus (2), wherein cleaning of the conditioning apparatus (2) and/or the dispensing apparatus (3) of constituent parts of the first medium (HWL) is made possible by the third medium, and wherein the third medium differs from the second medium in terms of its physical properties and/or its chemical composition.