Electronic Ignition System for Consistent Generator Engine Starting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Standby generators with spark ignition engines face challenges in providing consistent voltage to ignition coils, leading to unpredictable combustion and difficulty in starting the engine, especially in cold climates.
Innovation Solution
An electronic ignition system with a digital ignition module is implemented, which includes ignition coils powered by a battery system and controlled by a digital ignition module that adjusts ignition timing based on engine speed and load, ensuring consistent voltage and improved combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a magneto system is used to power spark plugs, then the system structure is simple, but the voltage provided to spark plugs is inconsistent at different engine speeds
Solution Approach 1:
The patent replaces the mechanical magneto-based ignition system with an electronic ignition system that uses an ignition coil, capacitor, and electronic switch (transistor or SCR). This substitution eliminates the dependency on engine speed for voltage generation, providing consistent high-voltage sparks across all operating conditions while maintaining reasonable system complexity through the use of solid-state electronic components.
2Use of energy by moving object
If a magneto system is used, then no external power source is needed, but sufficient voltage cannot be provided at low engine speeds
Solution Approach 1:
The patent introduces an ignition coil as an intermediary device that transforms low-voltage battery power into high-voltage ignition sparks. The ignition coil, combined with a capacitor and electronic switch, creates a robust voltage multiplication system that delivers consistent high-voltage sparks regardless of engine speed, solving the power insufficiency problem at low speeds while maintaining system simplicity.
3Device complexity
If constant ignition timing is used, then the system is simple to control, but engine performance cannot be optimized under changing operating conditions
Solution Approach 1:
The patent implements dynamic ignition timing control by introducing a variable resistor (potentiometer) that allows adjustment of the firing delay period based on operating conditions. This enables the ignition timing to be optimized for different engine loads and speeds, improving engine performance and fuel efficiency while maintaining relatively simple control circuitry using basic electronic components.
4Productivity
If ignition timing is adjusted for optimal performance, then engine efficiency improves, but the system becomes more complex
Solution Approach 1:
The patent optimizes engine efficiency by enabling adjustment of ignition timing parameters through a variable resistor that changes the firing delay period. This simple parameter adjustment mechanism allows the ignition system to adapt to different operating conditions (idle, partial load, full load) without requiring complex electronic control systems, achieving a balance between performance optimization and system simplicity.
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 electronic ignition system provides consistent voltage to ignition coils, optimizing engine performance by adjusting ignition timing, and improving startup reliability even in cold conditions.
Implementation Method 1
an inductive pickup mounted to the crankcase adjacent the camshaft configured to sense a rotational position of the camshaft
Implementation Method 2
one or more ignition coils each coupled to a respective spark plug to provide a voltage to the respective spark plug
Data Source
AI summary
A standby generator includes an alternator to produce electricity for distribution to an electrical system, and an air-cooled internal combustion engine driving the alternator. The air-cooled internal combustion engine includes one or more cylinders, one or more spark plugs each configured to initiate combustion in a corresponding cylinder, and one or more ignition coils each coupled to a respective spark plug of the one or more spark plugs to provide a voltage to the respective spark plug. The standby generator also includes a battery system electrically coupled to the one or more ignition coils to provide power thereto, and a digital ignition module wiring the battery system to each of the one or more ignition coils to control operation of the one or more spark plugs.