Dual Spark Plug Ignition Control for Knock and Soot Reduction
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Solution Overview
Problem
Existing methods for controlling internal combustion engines with prechamber or hooked spark plugs do not optimize engine operation across varying operating ranges, leading to inefficiencies in consumption, performance, and increased exhaust emissions.
Innovation Solution
A method that initiates combustion using either a prechamber spark plug or a hooked spark plug based on the engine's operating range, utilizing ignition jets and sparks with timed offsets to reduce knocking and soot deposition, enhancing combustion efficiency and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If combustion is initiated by the prechamber spark plug using an ignition jet, then knocking tendency is reduced, but soot deposits on the prechamber spark plug increase
Solution Approach 1:
The patent converts the harmful effect of soot deposits on the prechamber spark plug into a beneficial outcome by using the hooked spark plug as a secondary ignition source. The hooked spark plug's ignition spark burns off the soot deposits, transforming the harmful accumulation into a self-cleaning mechanism that maintains combustion efficiency while preserving the knocking reduction benefits of prechamber ignition jet initiation
Solution Approach 2:
The patent changes the ignition parameters by introducing a time offset between the prechamber spark plug ignition jet and the hooked spark plug ignition spark. This temporal parameter modification allows the hooked spark plug to operate at optimal moments, ensuring complete combustion and preventing soot formation while maintaining the knocking reduction effect of the prechamber ignition system
2Adaptability or versatility
If a single spark plug type is used, then device complexity is reduced, but engine performance is optimized only in limited operating ranges
Solution Approach 1:
The patent implements multi-functionality by designing a system where both the prechamber spark plug and hooked spark plug can operate independently or in combination based on operating conditions. The prechamber spark plug excels at high load conditions with knocking risk, while the hooked spark plug performs optimally at low load conditions, creating a universal ignition system that adapts to all operating ranges
Solution Approach 2:
The patent introduces dynamic control by continuously monitoring engine operating parameters and automatically selecting or combining ignition sources based on real-time conditions. This dynamic adaptation allows the system to transition between different ignition modes, optimizing performance across varying load and speed conditions without requiring manual intervention
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 method improves engine efficiency, reduces knocking, and minimizes soot buildup by strategically employing both spark plug types, optimizing operation across different load and speed conditions.
Implementation Method 1
Combustion is initiated by the hooked spark plug by means of a corresponding ignition spark between electrodes of the hooked spark plug
Implementation Method 2
Combustion was initiated by the prechamber spark plug by means of at least one ignition jet which extends into a combustion chamber of the internal combustion engine
Implementation Method 3
Combustion is initiated by the hooked spark plug... Combustion was initiated by the prechamber spark plug
Data Source
AI summary
A method and a device for controlling an internal combustion engine which, in a combustion chamber includes a prechamber spark plug and a hooked spark plug. In a first operating range of the internal combustion engine, combustion in the combustion chamber is initiated by the prechamber spark plug, and in a second operating range of the internal combustion engine, combustion is initiated by the hooked spark plug.