Injector Deviation Correction via Dynamic Voltage Current Selection
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Solution Overview
Problem
Conventional fuel injectors struggle to accurately correct deviations in characteristics due to variations in voltage and current across different types and environmental factors, leading to inefficiencies in fuel injection and emission control, particularly under stringent Euro 6+ emission regulations.
Innovation Solution
A device with a drive semiconductor that automatically selects voltage or current to correct injector characteristics by detecting drive characteristics, using a combination of sensors and control units to generate a correction signal and adjust the injector's driving, ensuring precise fuel injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a general injector uses only one of voltage or current to recognize injector characteristics, then the device complexity is reduced, but the measurement precision of injector deviation is insufficient due to variations in voltage and current characteristics across different injector types and environmental conditions
Solution Approach 1:
The control method dynamically selects between voltage and current as the detection parameter based on real-time comparison of their deviation values. The system switches from static single-parameter detection to dynamic multi-parameter selection, allowing the most accurate parameter to be used at any given moment while maintaining relatively simple hardware architecture.
Solution Approach 2:
The system changes the detection parameter (switching between voltage and current) based on which parameter shows larger deviation characteristics for the specific injector type and environmental conditions. This parameter adaptation enables accurate deviation detection across different injector types without requiring completely separate detection systems.
2Productivity
If the same injector repeatedly injects fuel, then the productivity is improved, but the manufacturing precision of fuel injection amount deteriorates due to accumulated deviations and environmental factor changes
Solution Approach 1:
The system continuously monitors injector performance by comparing actual voltage or current consumption against expected values and provides real-time feedback for deviation correction. This feedback mechanism allows the system to maintain precision over repeated injection cycles by compensating for accumulated deviations and environmental changes.
Solution Approach 2:
The system performs preliminary deviation detection and correction before each injection cycle by comparing actual injector characteristics against stored reference data. This preliminary action prevents precision degradation from accumulating during repeated operation, ensuring consistent fuel injection accuracy throughout the injection sequence.
3Object-affected harmful factors
If multi-injection technology is implemented to meet Euro 6+ emission regulations, then the emission control is improved, but the device complexity increases due to the need for precise control of multiple injection events
Solution Approach 1:
The injection process is segmented into multiple independent injection events, each of which can be controlled using the same simplified voltage/current selection method. By dividing the total fuel injection into separate controllable segments, the system achieves precise control for emission reduction without requiring a fundamentally complex control architecture.
Solution Approach 2:
The same voltage/current selection and deviation correction mechanism serves all multiple injection events, making the control system universal rather than requiring separate specialized control for each injection phase. This multi-functionality reduces overall system complexity while enabling precise control of multiple injection events for emission compliance.
Data Source
AI summary
A device for correcting injector characteristics includes: an injector-characteristic detection unit that outputs a selection signal by detecting drive characteristics of injectors in response to a selection control signal; a selection control unit that outputs the selection control signal for selecting a factor for deviation correction to the injector-characteristic detection unit; a selection confirmation unit that confirms a variation value of the factor corresponding to the selection signal; a deviation correction unit that calculates a deviation compensation value corresponding to the injector characteristics in response to an output signal of the selection confirmation unit, and thus output a correction signal; a control unit that generates a correction clock in response to the correction signal; and an output drive unit that controls driving of the injectors in response to the correction clock.