Ignition System Abnormality Detection via Magnetic Coupling
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Solution Overview
Problem
Existing ignition systems require complex circuit configurations and additional terminals to detect abnormalities in both sub primary and main primary coils, complicating the system and increasing the number of components needed.
Innovation Solution
An ignition system that uses a main primary coil, a sub primary coil, a secondary coil, and control units to determine the state of the sub primary current path without requiring detection means on the sub primary current path, by utilizing a detection unit on the main primary current path to assess the state of the sub primary coil through magnetic coupling and switching modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If main primary current detection means is independently provided to detect abnormalities in both main and sub primary coils, then detection capability is improved, but device complexity increases and the number of terminals increases
Solution Approach 1:
The main primary current detection means is designed to perform multiple functions: it detects both the main primary current flowing through the main primary coil and the sub primary current flowing through the sub primary coil. By making the detection means universal, the patent eliminates the need for separate detection devices for each coil, thereby reducing device complexity while maintaining comprehensive abnormality detection capability for both coils
Solution Approach 2:
The patent merges the detection functions for the main primary coil and sub primary coil into a single integrated detection unit. This unified detection means monitors both currents through the main primary current path, combining what would traditionally require separate detection systems into one component, thus reducing the overall number of terminals and simplifying the circuit configuration
2Reliability
If main primary current detection means is independently provided to detect abnormalities in both main and sub primary coils, then detection capability is improved, but the number of terminals increases
Solution Approach 1:
The detection means is designed with universal functionality to monitor both main and sub primary currents through the main primary current path. This multi-functional approach allows a single detection unit to replace what would traditionally require multiple separate detection terminals, thereby reducing the total number of terminals needed in the system while maintaining the ability to detect abnormalities in both coils
3Ease of operation
If sub primary current detection means is provided on the sub primary current path, then sub primary coil abnormality detection is simplified, but additional detection means must be added to detect main primary coil abnormalities
Solution Approach 1:
Instead of providing separate detection means for each coil, the patent implements a universal detection approach where the main primary current detection means monitors both the main primary current and sub primary current. This eliminates the need for additional detection devices while maintaining the ability to detect abnormalities in both coils, thus avoiding increased device complexity
Solution Approach 2:
The patent combines the detection of main and sub primary currents into a single integrated detection system. By merging these detection functions and implementing them through the main primary current path, the system achieves comprehensive monitoring without requiring separate detection means for each coil, thereby maintaining operational simplicity while reducing the total quantity of detection components
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 configuration allows for the determination of sub primary current path abnormalities without additional detection means, simplifying the circuit and reducing the number of terminals, thereby enhancing system reliability and efficiency.
Implementation Method 1
a main primary coil configured to generate an energization magnetic flux through current supply, and to generate a de-energization magnetic flux in an opposite direction to a direction of the energization magnetic flux through interruption of the current supply
Implementation Method 2
a sub primary coil configured to generate an additional magnetic flux in the same direction as the direction of the de-energization magnetic flux through current supply
Implementation Method 3
a secondary coil configured to magnetically couple to the main primary coil and the sub primary coil, to thereby generate energy
Data Source
AI summary
Provided is an ignition system including: a main primary coil; a main IC configured to switch a main primary coil mode between an energization mode and a de-energization mode; a sub primary coil; a sub IC configured to switch a sub primary coil mode between an energization mode and a de-energization mode; a secondary coil; a detection unit configured to detect a state of the main primary coil; and a control unit configured to determine whether a state of a sub primary current path is normal or abnormal based on the state of the main primary coil detected by the detection unit, the sub primary current path being a current path of a sub primary current flowing through the sub primary coil.