Integrated Engine Ignition Controller Layout for Heat and Vibration
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Solution Overview
Problem
Conventional engine ignition systems are large, heavy, and lack integration with modern engine control systems, leading to inefficiencies and susceptibility to high temperatures and vibrations.
Innovation Solution
A multifunction controller is integrated with the exciter, allowing for thermally isolated placement and leveraging existing controller resources to reduce weight and size, while enhancing control and monitoring capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the exciter and controller are integrated in a single housing, then device complexity is reduced, but the controller is exposed to high temperatures and vibrations which worsens reliability
Solution Approach 1:
The system is divided into two functional modules: the exciter unit (handling high voltage generation and spark discharge) and the controller unit (handling control logic and monitoring). This segmentation allows the controller to be physically separated from the high-temperature combustion chamber environment while maintaining functional integration through communication interfaces.
Solution Approach 2:
A thermal barrier or heat shield acts as an intermediary between the combustion chamber and the controller housing, allowing the controller to operate in a thermally protected zone while still monitoring and controlling the ignition process in the high-temperature environment.
2Reliability
If conventional separate housings are used for exciter and controller, then thermal protection is improved, but system weight and size increase
Solution Approach 1:
The controller housing is designed to serve multiple functions: it houses the control electronics, provides thermal protection through integrated heat shielding, and acts as a mounting structure for sensors and actuators. This multi-functionality reduces the need for separate protective structures, thereby reducing overall weight.
3Power
If maximum charge rate is used to define max spark rate, then spark output energy is maximized, but system complexity and power consumption increase
Solution Approach 1:
The charge rate of the energy storage device is dynamically adjusted based on real-time operational requirements, engine load conditions, and desired spark energy levels. This dynamic control allows the system to optimize the balance between charge rate and spark rate, avoiding the need for maximum continuous charging while maintaining adequate spark energy output.
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 results in a lighter, more reliable ignition system with improved thermal management and fault detection, and reduces complexity by integrating modern control functions into the multifunction controller.
Implementation Method 1
The exciter can include a step-up transformer connected between a power supply input and the energy storage device
Implementation Method 2
The exciter is the ignition power supply and driver that converts the low voltage power supply input to a much higher internal voltage, and applies the high voltage to charge an energy storage device
Implementation Method 3
The exciter is the ignition power supply and driver that converts the low voltage power supply input to a much higher internal voltage
Data Source
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Figure 3
AI summary
An engine ignition system (100) can include a multifunction controller (101), and an exciter (103) operatively connected to the multifunction controller (101). The multifunction controller (101) can be configured to control the exciter (103) to output an ignition voltage. The multifunction controller (101) can be configured to perform at least one other engine control function.