Fuel Injection Control Circuit Shortest Path Angle Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In internal combustion engines, adjusting the start of fuel injection from a source angle to a destination angle often results in fuel injection overlapping with the intake valve close, leading to inefficient fuel allocation and undesirable emissions, as existing systems fail to accurately account for the intake valve close timing.
Innovation Solution
A control circuit with a processor and memory adjusts the start of fuel injection by calculating the shortest path from the source to the destination angle, determining if fuel injection will overlap with the intake valve close, and sending signals to increment the injection in the appropriate direction to avoid overlap, ensuring all fuel is allocated to the correct engine cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the start of fuel injection is adjusted from a source angle to a destination angle using the shortest path, then the adjustment speed is improved, but fuel injection may overlap with the intake valve close causing incorrect fuel allocation
Solution Approach 1:
The control circuit performs preliminary detection to check whether the shortest path from source angle to destination angle will cause fuel injection to overlap with intake valve close. Based on this preliminary assessment, the system proactively selects the appropriate path (shortest or alternative) before executing the angle adjustment, preventing incorrect fuel allocation while maintaining efficient convergence
Solution Approach 2:
The system dynamically adjusts the path selection for start of injection angle based on real-time engine operating conditions, including the position of intake valve close. The control circuit can switch between shortest path and alternative path strategies depending on whether overlap with intake valve close would occur, optimizing both adjustment speed and fuel allocation accuracy under varying conditions
2Productivity
If fuel injection is advanced to reach destination angle faster, then productivity is improved, but fuel may be lost to the intake manifold causing emissions problems
Solution Approach 1:
The control circuit continuously monitors the relationship between fuel injection timing and intake valve close position, using this feedback to determine whether advancing the start of injection angle would cause overlap. The system adjusts the injection angle increment strategy based on this feedback loop, ensuring rapid convergence to destination angle while preventing fuel loss to the intake manifold and associated emissions problems
Data Source
AI summary
Systems and methods for optimizing fuel injection in an internal combustion engine adjust start of fuel injection by calculating whether one of advancing or retarding start of fuel injection will provide a shortest path from a source angle to a destination angle. Based on the source angle and a given injection pulse width and angle increment, it is determined whether fuel injection will overlap with a specified engine event if start of fuel injection is moved in a direction of the shortest path. A control circuit increments start fuel injection in the direction of the shortest path if it is determined that fuel injection will not overlap with the specified engine event, or increments start fuel injection in a direction opposite that of the shortest path if it is determined that fuel injection will overlap with the specified engine event.