Decentralized Injector Data Processing for Common Rail Systems
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Solution Overview
Problem
In common rail systems for internal combustion engines, there is a challenge in accurately regulating the start and end of fuel injection due to time shifts between injector needle lift and actual injection, leading to imprecision in fuel volume delivery, and existing systems struggle with diagnosing injector malfunctions and aging effects.
Innovation Solution
A decentralized electronic system is implemented, where a local logic and storage device is coupled with a pressure measurement device to analyze injector data locally, reducing reliance on central systems, enabling efficient data handling and analysis, and allowing for adaptive adjustments based on aging high-pressure components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a centralized electronic device is used to collect and analyze injector data, then system complexity is reduced, but data transmission distance increases causing signal noise and reduced quality
Solution Approach 1:
The patent divides the data processing system into decentralized evaluation units, each assigned to specific injectors or injector groups. Each evaluation unit locally processes data from its assigned sensors, eliminating the need for long data transmission lines to a centralized device while maintaining reduced system complexity through modular architecture.
2Quantity of substance
If data is transmitted over long distances to a central electronic device, then data volume is reduced through centralized processing, but transmission time increases and signal quality deteriorates
Solution Approach 1:
The evaluation units perform preliminary data processing and analysis locally before any transmission to central storage. This preliminary action filters and prepares data in advance, reducing the volume of data that needs transmission and enabling faster response times without compromising comprehensive data collection.
3Reliability
If injector data is analyzed centrally, then diagnostic capability is reduced for aged or exchanged injectors, but system cost is reduced
Solution Approach 1:
The system continuously monitors injector performance parameters and provides feedback to the evaluation units. This enables real-time detection of injector aging effects and performance drifts, maintaining high diagnostic capability by comparing current measurements against historical data and theoretical models specific to each injector.
Solution Approach 2:
Each evaluation unit autonomously analyzes data from its assigned injectors without requiring constant central intervention. The decentralized units independently perform diagnostic functions, maintaining reliability for aged or exchanged injectors while reducing overall system cost through autonomous local processing.
Data Source
AI summary
Exemplary illustrations are provided of a common rail system for an internal combustion engine, having a rail for fuel and an injector for the purpose of injecting the fuel into a working space of the internal combustion engine, said injector having a fluid connection to said rail via a high-pressure conduit. The high-pressure conduit may have a high-pressure component with an individual reservoir, and the high-pressure conduit and/or the rail may have a pressure measurement device. The pressure measurement device may be coupled to a local logic and storage device of a decentralized, local electronic device which is designed for the purpose of locally analyzing and storing measurement data of the pressure measurement device, e.g., injector data and/or rail data, and the pressure measurement device is connected to the central electronic device via a bus, with the local logic and storage device connected between the same.