Ignition Drive Module Stabilizing IGBT Activation
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Solution Overview
Problem
Existing ignition systems face challenges in achieving stable performance and reliable function due to the need for precise matching of ignition coils with dedicated drive circuits, which can be unreliable and prone to disturbances.
Innovation Solution
An ignition drive module comprising a comparator, maximum dwell timer module, logical judgment module, IGBT module, peak filter, dwell time input end with capacitor, and hard-off switch, connected to an ignition drive circuit and ECU, which stabilizes the ignition process by filtering input peaks, controlling dwell time, and ensuring reliable IGBT activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dedicated drive circuits are designed for specific ignition coil performances, then the ignition system achieves precise functional requirements, but the system complexity increases and reliability decreases due to matching requirements
Solution Approach 1:
The ignition drive module is designed with universal functionality to work with different ignition coil types. The module integrates multiple functions including peak filtering, dwell time control, logical judgment, and IGBT driving in a single standardized interface, eliminating the need for dedicated drive circuits for each ignition coil performance level.
Solution Approach 2:
The patent combines previously separate functions (peak filter, dwell timer, logical judgment module, IGBT driver) into a single integrated ignition drive module. This merging reduces system complexity by eliminating multiple discrete components and simplifying the matching requirements between ignition coils and drive circuits.
2Reliability
If dedicated drive circuits are designed for specific ignition coil performances, then functional requirements are met, but the system becomes unreliable and prone to disturbances
Solution Approach 1:
The ignition drive module provides universal adaptability to work with different ignition coil types while maintaining reliable operation through integrated protection and control functions, including ground shift disturbance suppression and hard-off switch capabilities.
3Manufacturing precision
If the IGBT module is activated based on complex logical judgment, then the ignition control precision is improved, but the response time may be delayed
Solution Approach 1:
The module performs preliminary actions by pre-charging the ignition coil during the dwell time period and pre-evaluating input signals through peak filtering before IGBT activation. The logical judgment module continuously monitors conditions and is ready to activate the IGBT immediately when conditions are met, reducing actual response delay.
4Reliability
If input signals are thoroughly filtered and judged, then the reliability of ignition triggering is improved, but the system complexity increases
Solution Approach 1:
The patent merges the peak filter, dwell timer, and logical judgment module into a single integrated ignition drive module with a standardized interface, reducing overall system complexity while maintaining thorough signal processing and reliable ignition triggering.
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 solution provides a stable and reliable ignition drive module that suppresses ground shift disturbances, filters input spikes, and ensures timely shutdown of the IGBT, thereby enhancing the overall performance and reliability of the ignition system.
Implementation Method 1
a comparator, one end of which is connected to the module signal input end, and the other end is connected to a comparison resistance R that is grounded
Implementation Method 2
it comprises a peak filter connected to the output end of the comparator to filter the input positive or negative peak value less than preset time Ts
Implementation Method 3
an IGBT module connected to the logical judgment module which receives the signals from the maximum dwell timer module and the comparator to determine whether to activate the IGBT module
Implementation Method 4
the ignition coil is an executive component that provides ignition energy for igniting the air and fuel mixture in the engine cylinder. It is a special pulse booster based on the principle of electromagnetic induction. The low voltage is turned on and off according to the set frequency to make the secondary produce a voltage of 20-40 KV through the spark plug to produce an electric spark
Data Source
AI summary
Disclosed is an ignition drive module with stable performance and reliable function, which comprises a module signal input end, a voltage input end, a module signal output end, a comparator. One end of the comparator is connected to the module signal input end, and the other end is connected to a comparison resistance R that is grounded. The ignition drive module further comprises a maximum dwell timer module connected to the comparator, a logical judgment module connected to the comparator, and an IGBT module connected to the logical judgment module which receives the signals from the maximum dwell timer module and the comparator to determine whether to activate the IGBT module. The output end of the IGBT module is connected to the module signal output end.