Auxiliary Primary Coil Segmentation for Engine Ignition Stability
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Solution Overview
Problem
Existing ignition apparatuses for internal combustion engines face challenges in maintaining stable ignition control and energy supply, particularly at varying engine operation states and power supply voltages, leading to increased size and cost due to the need for larger circuit elements and faster on/off control.
Innovation Solution
The proposed ignition apparatus includes a main ignition coil and an auxiliary primary coil magnetically coupled with a secondary coil, featuring a main ignition circuit unit and an energy supply circuit unit that selectively uses multiple auxiliary-primary-coil portions based on power supply voltage and engine state to control energization, allowing for efficient energy supply over a wider range without increasing size or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If larger circuit elements and faster on/off control are used to maintain stable ignition control and energy supply at varying engine operation states and power supply voltages, then ignition stability is improved, but apparatus size and cost increase
Solution Approach 1:
The auxiliary primary coil is divided into multiple auxiliary-primary-coil portions that can be selectively energized. This segmentation allows the system to maintain stable ignition control across varying operating conditions without requiring a single oversized coil, thereby improving ignition stability while keeping apparatus size compact.
Solution Approach 2:
The control unit dynamically selects which auxiliary-primary-coil portions to energize based on real-time detection of engine operation state and power supply voltage. This dynamic adaptation enables stable ignition performance across varying conditions without requiring fixed oversized circuit elements, resolving the contradiction between reliability and apparatus size.
2Reliability
If larger circuit elements and faster on/off control are used to maintain stable ignition control and energy supply at varying engine operation states and power supply voltages, then ignition stability is improved, but apparatus cost increases
Solution Approach 1:
The auxiliary primary coil is divided into multiple auxiliary-primary-coil portions that can be selectively energized. This segmentation allows the system to maintain stable ignition control across varying operating conditions without requiring a single oversized coil, thereby improving ignition stability while keeping apparatus size compact.
Solution Approach 2:
The control unit dynamically selects which auxiliary-primary-coil portions to energize based on real-time detection of engine operation state and power supply voltage. This dynamic adaptation enables stable ignition performance across varying conditions without requiring fixed oversized circuit elements, resolving the contradiction between reliability and apparatus size.
3Adaptability or versatility
If multiple auxiliary-primary-coil portions are selectively used based on power supply voltage and engine state, then energy supply stability across broader operation range is improved, but circuit complexity increases
Solution Approach 1:
The auxiliary primary coil is divided into multiple auxiliary-primary-coil portions that can be selectively energized. This segmentation allows the system to maintain stable ignition control across varying operating conditions without requiring a single oversized coil, thereby improving ignition stability while keeping apparatus size compact.
Solution Approach 2:
The control unit detects engine operation state and power supply voltage, then selectively energizes appropriate auxiliary-primary-coil portions based on this feedback. This feedback mechanism enables adaptive energy supply across broader operation ranges while managing circuit complexity through intelligent control rather than hardware complexity.
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 enables compact, high-performance ignition with improved controllability and energy supply stability across a broader operation range, reducing the need for larger circuit elements and faster on/off control, thus enhancing ignitability and reducing apparatus size and cost.
Implementation Method 1
an ignition coil that has a primary coil and a secondary coil is connected to a spark plug that is provided for each cylinder. A high voltage that is generated in the secondary coil is applied to the spark plug when energization of the primary coil is interrupted, and a spark discharge is generated
Implementation Method 2
The energy supply circuit unit controls energization of the auxiliary primary coil and performs an energy supply operation in which a current that has the same polarity as a secondary current that flows through the secondary coil as a result of the main ignition operation is superimposed on the secondary current
Data Source
AI summary
An ignition apparatus for internal combustion engine includes an ignition coil in which a main primary coil and an auxiliary primary coil are magnetically coupled with a secondary coil that is connected to a spark plug. In the ignition apparatus, a main ignition circuit unit controls energization of the main primary coil and performs a main ignition operation in which a spark discharge is generated in the spark plug. An energy supply circuit unit controls energization of the auxiliary primary coil and performs an energy supply operation in which a current that has the same polarity as a secondary current that flows through the secondary coil as a result of the main ignition operation is superimposed on the secondary current. The auxiliary primary coil includes a plurality of auxiliary-primary-coil portions. The energy supply circuit unit performs the energy supply operation using one or more of the plurality of auxiliary-primary-coil portions.