Prechamber Cooling Channels for Combustion Engine
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Solution Overview
Problem
Existing prechamber devices for combustion engines face challenges in efficiently managing thermal loads and maintaining mechanical strength while minimizing cross-sectional dimensions, which limits their application in smaller engines and complicates maintenance.
Innovation Solution
A prechamber device with a cooling arrangement where cooling channels extend within the prechamber body but not through the nozzle body, creating a temperature gradient for effective heat conduction and maintaining mechanical strength, allowing for a compact design with reduced cross-sectional dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling channels are provided inside the nozzle body, then cooling efficiency is improved, but the cross-sectional dimension of the nozzle body increases
Solution Approach 1:
The cooling channels are extracted from the nozzle body and relocated to the prechamber body. The prechamber body now contains the cooling channels that extend from a first coolant inlet/outlet to a second coolant inlet/outlet, while the nozzle body remains free of cooling channels, maintaining its compact cross-sectional dimensions.
Solution Approach 2:
The prechamber body acts as an intermediary that houses the cooling channels and transfers cooling functionality to the nozzle body through thermal conduction. The prechamber body serves as a heat sink that conducts heat away from the nozzle body, enabling indirect cooling without increasing the nozzle body's cross-sectional area.
2Ease of operation
If the prechamber device is made compact with reduced cross-sectional dimensions, then ease of installation and maintenance is improved, but cooling efficiency may deteriorate
Solution Approach 1:
The cooling channels are arranged to extend axially along the prechamber body from one end to the other, utilizing the axial dimension for heat dissipation. This axial arrangement allows effective cooling while maintaining a compact radial cross-section, enabling the device to be both compact and efficiently cooled.
3Temperature
If cooling channels are extended through the nozzle body, then heat removal from the nozzle is improved, but mechanical strength of the nozzle body deteriorates
Solution Approach 1:
The cooling channels are extracted from the nozzle body and placed exclusively in the prechamber body. This separation preserves the nozzle body's structural integrity and mechanical strength by avoiding the weakening effects of drilled cooling passages, while still achieving effective heat removal from the prechamber assembly.
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
This design enhances cooling efficiency, maintains mechanical strength, and allows for the use of prechamber technology in smaller engines by reducing the cross-sectional dimensions of the nozzle body and simplifying installation and maintenance.
Implementation Method 1
The prechamber device is equipped with cooling channels. At least one cooling channel extends inside in the prechamber body and apart from the nozzle body from a first coolant inlet/outlet to a second coolant inlet/outlet.
Implementation Method 2
creating a temperature gradient for effective heat conduction
Data Source
AI summary
A prechamber device for a combustion engine, the prechamber device extending from a first axial end to a second axial end along an axial direction, is provided. The prechamber device includes a prechamber body circumferentially enclosing a prechamber volume, a nozzle body extending from the prechamber body and disposed at a first axial end of the prechamber device, an interior of the nozzle body in fluid communication with and providing an appendix of the prechamber volume, and nozzle openings provided through the nozzle body from the interior to the exterior of the nozzle body. The prechamber device also includes one or more cooling channels, extending inside in the prechamber body and apart from the nozzle body from a first coolant inlet/outlet to a second coolant inlet/outlet.