Electronic Control Device for Injector Precharge Voltage Adaptation
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Solution Overview
Problem
Existing fuel injection control systems for internal combustion engines experience changes in injector opening time due to variations in power supply voltage, leading to inconsistent fuel injection amounts, as they do not account for voltage changes during precharge control.
Innovation Solution
An electronic control device that adjusts the precharge current for the fuel injection valve based on the current power supply voltage, ensuring consistent valve opening times by monitoring and adapting the precharge current amount in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If precharge control is performed at a constant precharge current amount, then the control is simple, but the valve open time of the injector changes due to power supply voltage variations
Solution Approach 1:
The precharge current amount is made dynamic by adjusting it according to the detected power supply voltage. The control device changes the precharge current level based on voltage conditions, transforming a static control approach into a dynamic one that adapts to varying electrical conditions, thereby maintaining consistent valve open time across different voltage levels.
Solution Approach 2:
The invention changes the precharge current parameter based on power supply voltage detection. When voltage drops below a threshold, the precharge current amount is reduced proportionally. This parameter adjustment compensates for voltage variations and prevents changes in valve open time, resolving the contradiction between control simplicity and injection precision.
2Device complexity
If precharge current amount is determined based on current change parameter from previous injection, then the control is simplified, but the reflection of precharge current amount is delayed by one injection
Solution Approach 1:
The invention performs preliminary detection of the power supply voltage before the precharge control is executed. By detecting the voltage in advance and using it to determine the precharge current amount for the upcoming injection, the system eliminates the one-injection delay inherent in using feedback from previous injections. This preliminary action ensures real-time adaptation without temporal lag.
3Device complexity
If precharge current amount is determined without considering power supply voltage, then the control is simple, but the valve open time changes when difference occurs between power supply voltage at measurement and actual injection
Solution Approach 1:
The invention implements a feedback mechanism where the power supply voltage is continuously detected and used to adjust the precharge current amount in real-time. This closed-loop control ensures that the precharge current is always appropriate for the current voltage conditions, preventing valve open time variations and ensuring consistent injection performance across different operating conditions.
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 ensures a consistent injector injection amount regardless of power supply voltage changes, maintaining precise control over fuel injection and preventing variations in valve opening times.
Implementation Method 1
an electromagnetic unit (13) that actuates a valve body (33)
Data Source
AI summary
Provided is an electronic control device capable of always achieving a desired injector injection amount by preventing a change in injector opening time regardless of a change (a decrease) of a power supply voltage for opening a valve of an injector. A precharge current amount at the time of precharge control is changed in a stepwise manner based on a voltage of the injector valve open power supply device 10 at the time of the precharge control.