Distributed Ignition Coil Control for Flexible Spark Timing

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Solution Overview

Problem

Existing ignition systems rely on centralized control, which can limit flexibility and efficiency in managing ignition timing across multiple ignition transformers.

Innovation Solution

A distributed architecture ignition system with a central control unit and local control units at each ignition coil assembly, allowing for independent regulation of ignition timing and communication over twisted pair cables.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a centralized control system is used to control multiple ignition transformers, then the system structure is simplified and easier to manufacture, but the flexibility and efficiency in managing ignition timing is reduced

Engineering Contradiction:

Improvesystem structureVSAvoidignition timing control flexibility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The control system is segmented into a central control unit and distributed local control units at each ignition coil assembly. Each local control unit independently regulates ignition timing for its associated ignition transformer, providing flexibility and adaptability while the central unit maintains overall system coordination.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each ignition coil assembly is equipped with its own local control unit that can independently adjust ignition timing parameters based on local conditions. This local quality approach allows each part of the system to have the specific control capabilities needed for optimal performance.

Inventive Principle:

Principle #3Local quality

2Power

If high voltage cabling is used to provide high primary drive voltage to ignition coils, then higher ignition voltage is achieved, but the complexity and safety risks of the cabling system increase

Engineering Contradiction:

Improveprimary drive voltageVSAvoidcabling system

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The voltage boosting function is segmented from the central control unit and placed at the local ignition coil assembly. Each ignition coil assembly includes a power supply that steps up the low-voltage signal from the central controller to the required high voltage locally, eliminating the need for high voltage cabling throughout the system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A low-voltage intermediary signal is transmitted from the central control unit to the ignition coil assemblies, which then converts it to high voltage locally. This intermediary approach allows high power output without requiring high voltage transmission through the cabling system.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If a distributed control system with local control units is implemented, then ignition timing flexibility and diagnostic capabilities are improved, but the device complexity increases

Engineering Contradiction:

Improveignition timing regulationVSAvoidcontrol system architecture

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The local control unit is merged with the ignition coil assembly, combining the control functionality directly at the ignition point. This integration reduces the need for separate control components and simplifies the overall system architecture while maintaining distributed control capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The local control unit performs multiple functions including ignition timing regulation, signal processing, and diagnostic monitoring. This multi-functionality reduces the need for separate dedicated components for each function, thereby reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enables improved packaging, signal processing, and control, allowing for higher primary drive voltages while maintaining low-voltage cabling, and providing enhanced diagnostic capabilities and engine performance monitoring.

Implementation Method 1

An ignition coil assembly (or multiple assemblies) has an ignition transformer with primary and secondary windings

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the local control unit steps up a final primary drive within the coil assembly, such that a higher primary drive voltage is provided

Methodology Applied

Scientific EffectVoltage step-up transformation: Electromagnetic Induction

Data Source

PatentUS20250146466A1Distributed architecture ignition system

Publication Date: 2025.05.08 ALTRONIC LLC

AI summary

A system and method for controlling an ignition system. An ignition coil assembly has an ignition transformer with primary and secondary windings and a local control unit. A spark apparatus is connected with the secondary winding of the ignition transformer. The local control unit is adapted to regulate ignition timing of the ignition transformer for generating a spark at the spark apparatus to ignite a fuel-air mixture in an engine cylinder. A central control unit is in electronic communication with the local control unit for monitoring the ignition transformer.