Ignition Switch Periodic Guidance for Energy Reduction
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Solution Overview
Problem
Existing ignition systems for internal combustion engines face inefficiencies in energy consumption, particularly during speed limitation and shutdown operations, due to continuous guidance of the ignition switch over a full revolution, leading to unnecessary current consumption and increased manufacturing costs.
Innovation Solution
The ignition switch is guided only in specific angular ranges where the ignition capacitor would be charged, using electrical impulses to reduce energy consumption, and a high coupling resistance is implemented to maximize energy availability for the ignition capacitor, even with increased mechanical tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ignition switch is continuously guided over a full revolution to ensure reliable ignition control, then the reliability of ignition control is improved, but the energy consumption increases significantly
Solution Approach 1:
The ignition switch is guided only during specific angular ranges (positive charging half waves) rather than continuously throughout the full revolution. This periodic guidance approach maintains reliable ignition control during critical charging phases while eliminating unnecessary current consumption during non-critical periods, achieving energy reduction by a factor of 2-4.
2Power
If a low coupling resistance is used to maximize current supply to the control device, then the current supply capability is improved, but the energy available for the ignition capacitor decreases
Solution Approach 1:
The coupling resistance is optimized to a specific value range (2-10 kΩ) that balances two competing requirements: providing sufficient current to power the control device while preserving adequate energy for charging the ignition capacitor. This parameter optimization resolves the contradiction between control device power supply and ignition energy availability.
3Reliability
If the ignition switch is guided for the entire revolution to prevent capacitor charging during speed limitation, then the speed limitation function is improved, but unnecessary current consumption occurs
Solution Approach 1:
During speed limitation operations, the ignition switch is guided only during the occurrence of positive charging half waves rather than continuously throughout the revolution. This periodic guidance maintains the speed limitation function by preventing capacitor charging when needed, while avoiding unnecessary current consumption during phases where charging would not occur anyway, further reducing energy loss.
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 reduces energy consumption for guiding the ignition switch by a factor of 2-4, increases charging voltage and energy storage in the ignition capacitor, and allows for efficient operation despite mechanical misalignment, thereby optimizing energy use and reducing costs.
Implementation Method 1
the magnetic field of the magnetic ignition generator flows through the coils at times, and a sequence of magnetic flux alterations is generated for each revolution. By this means, corresponding alternating current half waves are induced in the coils.
Implementation Method 2
an energy storage element, for example an ignition capacitor, is charged with alternating current half waves and discharged via the primary coil winding of an ignition transmitter for triggering an ignition spark
Data Source
AI summary
An ignition procedure for internal combustion engines using multiple coils of a generator coupled to and turning synchronously with the engine. A magnetic field flows through the coils and generates a sequence of alternating current half waves induced in the coils. The half waves are used for: (1) charging an energy storage element that is discharged by an ignition switch via the primary coil winding for triggering an ignition spark; (2) processing via a control device for activating the ignition switch at an ignition time in dependence on the processed alternating current half waves and/or on the state of the internal combustion engine; and (3) the power supply for the control device (U8), and an operating mode for switching combustion off for the engine, whereby by means of the control device, the ignition switch is guided over less than the time span that is needed for a complete revolution of the magnetic generator.