Dosing Valve Cooling Device for High-Temperature Engine Modules
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Solution Overview
Problem
Existing metering modules for internal combustion engines face challenges in effectively cooling the metering valve and electrical components, particularly at high temperatures, which can lead to component failure and reduced functionality.
Innovation Solution
A dosing module with a cooling device featuring two interconnected chambers, where the cooling fluid flows through the first chamber to cool the valve tip and the second chamber to cool the electrical components, ensuring optimal thermal management and preventing component damage at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cooling chamber is used, then the structure is simple, but the cooling effectiveness for different temperature zones is insufficient
Solution Approach 1:
The cooling device is divided into a first cooling chamber and a second cooling chamber, each serving different cooling purposes. The first cooling chamber cools the valve tip area exposed to exhaust gases, while the second cooling chamber cools the electrical components, allowing differentiated thermal management for different temperature zones
2Manufacturing precision
If the metering valve is positioned close to the exhaust tract, then the dosing precision is improved, but the temperature exposure increases causing component damage
Solution Approach 1:
The cooling device segments the metering valve into different thermal zones: the valve tip area is cooled by the first cooling chamber to enable close positioning to the exhaust tract for precise dosing, while the electrical components are protected by the second cooling chamber, allowing the valve to operate in high-temperature environments without component damage
Solution Approach 2:
The cooling fluid acts as an intermediary between the exhaust tract heat and the sensitive components. It absorbs heat in the first cooling chamber near the exhaust tract and transports it away, protecting the electrical components in the second chamber from thermal damage while allowing the valve tip to remain close to the exhaust for precise dosing
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 reliable operation of the metering module at ambient temperatures above 160°C, preventing electrical plug connection and magnetic coil damage, thus ensuring continuous functionality and extended service life, even in high-temperature environments like the engine compartment.
Implementation Method 1
the cooling fluid circulating in the cooling circuit of an internal combustion engine or a separate cooling fluid that is separate from this cooling fluid and can circulate in a separate cooling circuit can be used as the cooling fluid
Implementation Method 2
The second chamber is located in the central area of the metering valve and cools, for example, an electrical contact point at which contact is made with a magnetic coil of the electrically actuated metering valve, excluding an electrical short circuit
Data Source
AI summary
The invention relates to a metering module (10) including a metering valve (12). The metering module further includes a cooling device through which a cooling fluid flows. Said cooling device comprises a first chamber (26) that has a cooling fluid inlet (42). The metering valve (12) has an additional cooling member (36) containing a second chamber (52) which is hydraulically connected to the first chamber (26) via at least one opening (50).