Internal Combustion Engine Fuel Control Using Injector Drift Compensation
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Solution Overview
Problem
Improper fuel injection due to fuel injector drift causes engine damage and decreased performance in internal combustion engines, particularly in dual fuel engines where different fuels with varying energy densities are used.
Innovation Solution
A control system with sensors and a controller that estimates actual fueling amounts and determines compensation amounts for fuel injectors based on cylinder conditions, adjusting fueling commands to account for injector drift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fuel injector drift occurs, then fuel injection accuracy deteriorates, but engine performance and reliability worsen
Solution Approach 1:
The system implements feedback by sensing actual cylinder conditions (pressure, temperature, combustion characteristics) and using this information to estimate actual fueling amounts. The controller continuously monitors engine operation and adjusts fueling commands based on detected deviations from expected performance, thereby compensating for injector drift and maintaining both measurement precision and reliability.
Solution Approach 2:
The system changes operational parameters by adjusting fueling commands based on estimated actual fueling amounts. When injector drift is detected through sensor data analysis, the controller modifies fuel injection parameters (quantity, timing, duration) to compensate for the drift, thereby restoring accurate fuel injection and preventing engine damage.
2Measurement precision
If fuel injector drift occurs, then fuel injection accuracy deteriorates, but engine performance decreases
Solution Approach 1:
The system uses sensor feedback to continuously monitor actual fueling amounts and compares them against target values. When deviations indicating injector drift are detected, the controller adjusts subsequent fueling commands to compensate, thereby maintaining optimal engine performance despite the drift condition.
Solution Approach 2:
The system performs preliminary estimation of actual fueling amounts based on sensor data before executing adjusted fueling commands. This preliminary assessment allows the controller to proactively compensate for injector drift by pre-calculating the necessary compensation amounts, thereby preventing performance degradation before it occurs.
3Measurement precision
If compensation amounts are determined based on actual fueling amounts, then fuel injection accuracy improves, but control system complexity increases
Solution Approach 1:
The system implements self-service by using the engine's own operational data (sensor readings from cylinder pressure, temperature, and combustion characteristics) to estimate actual fueling amounts and determine compensation amounts. This self-diagnostic capability eliminates the need for external calibration equipment or complex additional hardware, achieving improved accuracy through the engine's inherent operational information.
Solution Approach 2:
The control system achieves multi-functionality by using the same sensor network and controller for both monitoring engine operation and estimating fueling amounts. The existing sensor infrastructure serves dual purposes: traditional engine control functions and drift detection/compensation functions, thereby improving fuel injection accuracy without proportionally increasing system complexity.
Data Source
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AI summary
A control system for an internal combustion engine structured to operate using at least a first fuel includes at least one sensor configured to sense a condition within at least one cylinder of the internal combustion engine, and a controller operably connected to the at least one sensor. The controller is configured to receive at least one fueling request corresponding to at least the first fuel, send at least one fueling command to at least one injector within the internal combustion engine system corresponding to the at least one fueling request, receive at least one signal from the at least one sensor corresponding to the condition, estimate an actual fueling amount within the internal combustion engine based on the at least one signal, and determine at least one compensation amount corresponding to the at least one injector based on the actual fueling amount.