Fuel Injection Control Device Individual Difference Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing fuel injection control devices face challenges in accurately and frequently detecting individual differences among fuel injection valves due to fluctuations in fuel pressure and injection pulse width, leading to reduced execution frequency and accuracy of individual difference detection.
Innovation Solution
A fuel injection control device that measures valve closing time, divides solenoid energization time into sections, calculates average valve closing times, and corrects energization time based on specific valve closing times to improve detection accuracy and frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the injection pulse width for permitting individual difference detection is lengthened, then the valve body stability improves, but the execution frequency of individual difference detection decreases
Solution Approach 1:
The patent divides the energization time into multiple sections and performs individual difference detection in each section. This segmentation allows detection to occur at multiple time points during the injection pulse, thereby increasing execution frequency while maintaining valve body stability through cumulative measurements across sections.
2Productivity
If the injection pulse width for permitting individual difference detection is shortened, then the execution frequency increases, but the variation in detection results increases and accuracy deteriorates
Solution Approach 1:
The patent continuously performs individual difference detection across multiple sections of the energization time rather than relying on a single measurement. This continuous action accumulates detection data throughout the injection pulse, maintaining high execution frequency while improving accuracy through multiple measurements that average out variations.
Solution Approach 2:
The patent uses the detection results from multiple sections to calculate individual difference values, applying feedback mechanisms to refine measurements. By comparing results across sections and using cumulative data, the system maintains accuracy even with shorter pulse widths and higher execution frequencies.
3Adaptability or versatility
If individual difference detection is performed under varying fuel pressure conditions, then the adaptability improves, but the accuracy of individual difference detection deteriorates
Solution Approach 1:
The patent dynamically adjusts the detection approach by dividing energization time into sections and performing detection at multiple points. This dynamic method allows the system to adapt to varying fuel pressure conditions while maintaining accuracy through multiple measurements that compensate for pressure fluctuations.
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 enhances the execution frequency and accuracy of individual difference detection for multiple fuel injection valves by accounting for variations in valve closing times, thereby stabilizing valve operations and improving fuel injection control.
Implementation Method 1
a valve body moves from a valve closing position to a valve opening position by energizing a solenoid
Data Source
AI summary
An object of the present invention is to provide a fuel injection control device capable of improving the execution frequency and accuracy of individual difference detection of a plurality of fuel injection valves. Therefore, the fuel injection control device 127 is configured to measure, as a valve closing time, a time from when energization of the solenoid 407 is finished to when the valve body 402 moves to the valve closing position for each of the plurality of fuel injection valves 105; divide an energization time of the solenoid 407 into a plurality of sections 1001 to 1004; calculate, as an average valve closing time, an average value of the valve closing times measured a plurality of times, in each of the plurality of sections 1001 to 1004; calculate a specific valve closing time based on the average valve closing time of at least one section among the plurality of sections 1001 to 1004; and correct the energization time according to the specific valve closing time of each of the plurality of fuel injection valves 105.