Fuel Injection Control Information Generation for NOx and Fuel Consumption Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The NOx emission amount and fuel consumption rate are in a trade-off relationship with respect to changes in fuel injection timing (SOI), requiring a solution to adequately suppress both increases in NOx emissions and deterioration of fuel consumption.
Innovation Solution
A fuel injection control information generation apparatus that associates engine speed, fuel injection amount, and intake oxygen concentration with optimum fuel injection timing to minimize the total amount of fuel consumption rate and NOx emission, using a control apparatus to determine fuel injection timing based on generated control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fuel injection timing (SOI) is retarded to reduce combustion temperature, then NOx emission amount is reduced, but fuel consumption rate is deteriorated
Solution Approach 1:
The invention changes the parameter of fuel injection timing (SOI) to optimize the trade-off between NOx emissions and fuel consumption. By systematically varying SOI across multiple test points and identifying the optimum value that minimizes a composite index of both NOx emission amount and fuel consumption rate, the system dynamically adjusts this critical parameter to achieve balanced performance.
Solution Approach 2:
The invention introduces dynamic adjustment of fuel injection timing based on operating conditions. Instead of using a fixed SOI value, the system determines optimal injection timing for each specific test point (combination of engine speed, fuel injection amount, and intake oxygen concentration), allowing the control strategy to adapt dynamically to changing engine operating conditions and achieve optimal balance between emissions and fuel efficiency.
2Use of energy by moving object
If fuel injection timing (SOI) is advanced to improve fuel consumption rate, then fuel consumption rate is improved, but NOx emission amount increases
Solution Approach 1:
The invention systematically varies the fuel injection timing parameter to find the optimal balance point. By testing multiple SOI values and evaluating a composite index that combines both fuel consumption rate and NOx emission amount, the system identifies the specific parameter setting that minimizes the overall negative impact, rather than optimizing for fuel consumption alone.
Solution Approach 2:
The system implements dynamic control of injection timing that adapts to operating conditions. For each test point representing different engine operating conditions, the system determines the optimal SOI value, enabling the control strategy to dynamically adjust between advancing or retarding injection timing based on real-time conditions to balance fuel efficiency and emissions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In order to adequately suppress both an increase in NOx emission amount and deterioration of fuel consumption rate, the present invention provides a fuel injection control information generation device equipped with: a test point information storage unit for holding test point information including a plurality of test points constituted by sets of engine speed, fuel injection amount, and oxygen concentration; and a control information generation unit for generating, for each test point included in the test point information, fuel injection control information in which the engine speed, fuel injection amount, and oxygen concentration of the test point are associated with an optimum fuel injection timing at which an index pertaining to the total of a fuel consumption rate and an NOx emission amount in the test point becomes the smallest.