Fuel Injector Control Method for Combustion Efficiency
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Solution Overview
Problem
Existing fuel injection methods in vehicle engines fail to optimize combustion efficiency and reduce harmful exhaust gases, particularly due to fuel adhesion issues and inefficient mixing of air and fuel, which can be exacerbated by simultaneous fuel injection from multiple injectors.
Innovation Solution
A control method and system for a fuel injector that determines the necessity of fuel injection based on the combustion cycle, allowing individual and simultaneous fuel injection by multiple injectors at different times, with a delay section between injections to induce swirling and regulate fuel flow, thereby improving mixing efficiency and preventing fuel adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple injectors simultaneously inject fuel, then the total fuel amount is delivered efficiently, but fuel adhesion to the intake port occurs and combustion efficiency decreases
Solution Approach 1:
The fuel injection process is divided into multiple sequential stages: first injection (when intake valve is closed), second injection (when intake valve is open), and optional third injection (near TDC). This segmentation prevents fuel adhesion by ensuring fuel is injected at optimal timing while maintaining efficient total fuel delivery through multiple injection events.
Solution Approach 2:
The system employs periodic injection cycles with specific timing intervals between injections. The controller regulates injection timing and duration for each injector in a periodic sequence, allowing fuel to be delivered efficiently while preventing adhesion through properly timed injection intervals that account for intake valve position and combustion chamber conditions.
2Object-generated harmful factors
If fuel injection timing is optimized for combustion efficiency, then harmful exhaust gases are reduced, but injection control complexity increases
Solution Approach 1:
The controller uses feedback from combustion cycle detection and sensor data to dynamically adjust injection timing and duration. By monitoring combustion conditions and regulating injector operation based on real-time feedback, the system reduces harmful exhaust gases while managing control complexity through adaptive rather than purely predetermined injection strategies.
Solution Approach 2:
The system performs preliminary determination of injection necessity based on detected combustion cycles before executing fuel injection. The controller pre-regulates injection timing and parameters based on anticipated combustion conditions, allowing for optimized combustion efficiency and reduced harmful emissions while simplifying real-time control by having preparation already completed.
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 method enhances combustion efficiency by promoting swirling of fuel and air, reduces harmful exhaust gases, and ensures the required fuel amount is delivered efficiently, preventing fuel adhesion and optimizing engine performance.
Implementation Method 1
swirling indicates that intake air flowing in a combustion chamber forms eddies that rotate along a circumference of a combustion chamber. Due to the swirling intake air, the performance of mixing the intake air and fuel in the combustion chamber is improved
Data Source
AI summary
A control method for a vehicle injector includes an injection time determination step in which a controller determines whether it is necessary for multiple injectors to inject fuel according to a combustion cycle of a combustion chamber, an individual injection step in which the controller controls each of the multiple injectors to individually inject fuel at different times when the controller determines in the injection time determination step that it is necessary for the injectors to inject fuel, and a simultaneous injection step in which the controller controls each of the multiple injectors to simultaneously inject fuel after the multiple injectors individually inject fuel at different times in the individual injection step.