Multiple Spark Ignition Control via Programmable Current Thresholds
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Solution Overview
Problem
Existing control systems for internal combustion engines face challenges in optimizing multiple spark operation due to fixed threshold values for primary and secondary currents, which are influenced by factors like fuel-air mixture composition and spark plug aging, leading to suboptimal engine performance and efficiency.
Innovation Solution
The system allows for individual setting of current thresholds based on operating states, using coded time periods and bidirectional interfaces to adapt ignition energy supply, ensuring optimal operation by adjusting thresholds dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed threshold values for primary and secondary currents are used in control systems, then the control system structure is simple, but the engine performance and efficiency deteriorate due to inability to adapt to varying operating conditions
Solution Approach 1:
The patent applies dynamics by transitioning from fixed threshold values to dynamically adjustable threshold values that adapt to varying engine operating conditions. The control system now modifies threshold values based on detected operating parameters, enabling the system to respond flexibly to changing conditions while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent implements parameter changes by modifying the electrical threshold parameters (primary and secondary current thresholds) based on operating conditions. Instead of changing the physical structure of the control system, the invention changes the electrical parameter values dynamically, allowing adaptation to different operating states without increasing hardware complexity.
2Reliability
If fixed threshold values are used for ignition control, then the control electronics are simple, but fuel ignition reliability deteriorates under varying mixture composition and spark plug aging conditions
Solution Approach 1:
The patent applies feedback by using detection means to monitor operating conditions (such as mixture composition and spark plug state) and using this information to adjust the ignition threshold values. This closed-loop feedback mechanism ensures reliable fuel ignition across varying conditions while keeping the control electronics relatively simple by using basic sensing and adjustment circuitry.
3Productivity
If individual current threshold setting is implemented for each operating state, then fuel ignition and engine performance improve, but the control system complexity increases
Solution Approach 1:
The patent implements dynamics by enabling the control system to dynamically adjust current threshold values according to detected operating states. This allows the system to optimize engine efficiency for each operating condition without requiring a completely complex control architecture, as the adjustment mechanism builds upon the existing control structure.
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 approach enhances fuel ignition reliability, reduces fuel consumption, and improves engine power demand by allowing real-time adaptation of current thresholds, ensuring efficient operation across varying conditions.
Implementation Method 1
an ignition transformer (10) for generating or interrupting an ignition spark current
Implementation Method 2
at least one current threshold is set as a function of a transformer current that can be detected or measured with a detection means
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to a device for controlling a multiple spark operation of an internal combustion engine, wherein an ignition transformer can be switched off and back on again for delivering or interrupting an ignition spark energy based on at least one current threshold. The invention proposes that the at least one current threshold be programmable.