Modular Precombustion Chamber for Engine Injector Space
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Solution Overview
Problem
The integration of an active precombustion chamber into internal combustion engines with high power density is challenging due to the need for precise geometry and energy distribution, as well as limited installation space for fuel injectors and ignition devices.
Innovation Solution
A modular precombustion chamber design where the precombustion chamber module is configured as a separate component from the cylinder head, allowing for oblique positioning of the ignition device and injector, which increases installation space and enables the use of larger-volume injectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the precombustion chamber is integrated directly into the cylinder head with conventional positioning, then the engine maintains compact structure, but the installation space for fuel injectors and ignition devices is insufficient
Solution Approach 1:
The precombustion chamber is separated from the cylinder head as an independent module, allowing separate optimization of installation space in the cylinder head and modular design of the precombustion chamber. This segmentation enables larger-volume fuel injectors and ignition devices to be installed without increasing overall engine complexity.
Solution Approach 2:
The precombustion chamber module is positioned obliquely relative to the cylinder head axis, utilizing three-dimensional space more effectively. This angular arrangement creates sufficient installation space for fuel injectors and ignition devices while maintaining a compact overall engine structure.
2Productivity
If larger-volume fuel injectors are installed to improve fuel delivery capacity, then fuel injection performance across various operating conditions is enhanced, but the available installation space in the cylinder head is exceeded
Solution Approach 1:
By separating the precombustion chamber as a modular component, the system allows installation of larger-volume fuel injectors in the precombustion chamber module rather than constrained within the cylinder head, thereby enhancing fuel delivery capacity without expanding the cylinder head footprint.
Solution Approach 2:
The precombustion chamber module acts as an intermediary structure that houses the fuel injector and ignition device, decoupling their installation requirements from the cylinder head's spatial constraints and enabling optimal component sizing.
3Reliability
If the precombustion chamber geometry is precisely optimized for energy distribution, then ignition reliability is improved, but the manufacturing and integration complexity increases
Solution Approach 1:
The precombustion chamber is manufactured as a separate modular component, allowing precise geometric optimization for energy distribution to be achieved through dedicated manufacturing processes without complicating the overall engine assembly. The module can be precisely manufactured and then integrated as a complete unit.
Solution Approach 2:
The precombustion chamber module is pre-assembled with precisely positioned fuel injectors and ignition devices before integration into the engine. This preliminary assembly allows for optimized energy distribution geometry to be established once during module fabrication rather than requiring complex adjustments during engine 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 solution allows for the efficient integration of an active precombustion chamber into existing engine designs, enabling reliable ignition and fuel injection across various engine operating conditions, while maintaining compatibility with existing engine interfaces.
Implementation Method 1
an ignition device (21) inserted into the precombustion chamber module (10), in particular into a receptacle (20) for the ignition device
Implementation Method 2
a main combustion chamber (7) in a cylinder of the internal combustion engine for combusting a fuel/air mixture
Data Source
AI summary
The disclosure relates to an internal combustion engine, comprising a main combustion chamber in a cylinder of the internal combustion engine for combusting a fuel/air mixture, and an active precombustion chamber having an ignition device protruding therein for igniting a fuel/air mixture located in the precombustion chamber and having a precombustion chamber injector that supplies fuel to the precombustion chamber, wherein at least one precombustion chamber module is provided, configured as a component separate from and inserted into the cylinder head, and wherein the precombustion chamber module comprises a cavity that forms the precombustion chamber and has at least one transfer port for fluidically connecting the precombustion chamber and main combustion chamber.